Floppy disk emulation (Jocelyn Mayer)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@545 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/hw/fdc.c b/hw/fdc.c
new file mode 100644
index 0000000..a47b809b
--- /dev/null
+++ b/hw/fdc.c
@@ -0,0 +1,1435 @@
+/*
+ * QEMU Floppy disk emulator
+ *
+ * Copyright (c) 2003 Jocelyn Mayer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "cpu.h"
+#include "vl.h"
+
+/********************************************************/
+/* debug Floppy devices */
+//#define DEBUG_FLOPPY
+
+#ifdef DEBUG_FLOPPY
+#define FLOPPY_DPRINTF(fmt, args...) \
+do { printf("FLOPPY: " fmt , ##args); } while (0)
+#else
+#define FLOPPY_DPRINTF(fmt, args...)
+#endif
+
+#define FLOPPY_ERROR(fmt, args...) \
+do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
+
+/********************************************************/
+/* Floppy drive emulation */
+
+/* Will always be a fixed parameter for us */
+#define FD_SECTOR_LEN 512
+#define FD_SECTOR_SC 2 /* Sector size code */
+
+/* Floppy disk drive emulation */
+typedef enum fdisk_type_t {
+ FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
+ FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
+ FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
+ FDRIVE_DISK_NONE = 0x04, /* No disk */
+} fdisk_type_t;
+
+typedef enum fdrive_type_t {
+ FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
+ FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
+ FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
+ FDRIVE_DRV_NONE = 0x03, /* No drive connected */
+} fdrive_type_t;
+
+typedef struct fdrive_t {
+ BlockDriverState *bs;
+ /* Drive status */
+ fdrive_type_t drive;
+ uint8_t motor; /* on/off */
+ uint8_t perpendicular; /* 2.88 MB access mode */
+ uint8_t rv; /* Revalidated */
+ /* Position */
+ uint8_t head;
+ uint8_t track;
+ uint8_t sect;
+ /* Last operation status */
+ uint8_t dir; /* Direction */
+ uint8_t rw; /* Read/write */
+ /* Media */
+ fdisk_type_t disk; /* Disk type */
+ uint8_t last_sect; /* Nb sector per track */
+ uint8_t max_track; /* Nb of tracks */
+ uint8_t ro; /* Is read-only */
+} fdrive_t;
+
+static void fd_init (fdrive_t *drv)
+{
+ /* Drive */
+ drv->bs = NULL;
+// drv->drive = FDRIVE_DRV_288;
+ drv->drive = FDRIVE_DRV_144;
+ drv->motor = 0;
+ drv->perpendicular = 0;
+ drv->rv = 0;
+ /* Disk */
+ drv->disk = FDRIVE_DISK_NONE;
+ drv->last_sect = 1;
+ drv->max_track = 0;
+}
+
+static int _fd_sector (uint8_t head, uint8_t track,
+ uint8_t sect, uint8_t last_sect)
+{
+ return (((track * 2) + head) * last_sect) + sect - 1;
+}
+
+/* Returns current position, in sectors, for given drive */
+static int fd_sector (fdrive_t *drv)
+{
+ return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
+}
+
+static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
+ int enable_seek)
+{
+ uint32_t sector;
+
+ if (track > drv->max_track) {
+ FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
+ head, track, sect, 1, drv->max_track, drv->last_sect);
+ return 2;
+ }
+ if (sect > drv->last_sect) {
+ FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
+ head, track, sect, 1, drv->max_track, drv->last_sect);
+ return 3;
+ }
+ sector = _fd_sector(head, track, sect, drv->last_sect);
+ if (sector != fd_sector(drv)) {
+#if 0
+ if (!enable_seek) {
+ FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
+ head, track, sect, 1, drv->max_track, drv->last_sect);
+ return 4;
+ }
+#endif
+ drv->head = head;
+ drv->track = track;
+ drv->sect = sect;
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Set drive back to track 0 */
+static void fd_recalibrate (fdrive_t *drv)
+{
+ FLOPPY_DPRINTF("recalibrate\n");
+ drv->head = 0;
+ drv->track = 0;
+ drv->sect = 1;
+ drv->dir = 1;
+ drv->rw = 0;
+}
+
+/* Revalidate a disk drive after a disk change */
+static void fd_revalidate (fdrive_t *drv, int ro)
+{
+ int64_t nb_sectors;
+
+ FLOPPY_DPRINTF("revalidate\n");
+ drv->rv = 0;
+ if (drv->bs != NULL) {
+ bdrv_get_geometry(drv->bs, &nb_sectors);
+#if 1
+ if (nb_sectors > 2880)
+#endif
+ {
+ /* Pretend we have a 2.88 MB disk */
+ drv->disk = FDRIVE_DISK_288;
+ drv->last_sect = 36;
+ drv->max_track = 80;
+#if 1
+ } else if (nb_sectors > 1440) {
+ /* Pretend we have a 1.44 MB disk */
+ drv->disk = FDRIVE_DISK_144;
+ drv->last_sect = 18;
+ drv->max_track = 80;
+ } else {
+ /* Pretend we have a 720 kB disk */
+ drv->disk = FDRIVE_DISK_720;
+ drv->last_sect = 9;
+ drv->max_track = 80;
+#endif
+ }
+ } else {
+ drv->disk = FDRIVE_DISK_NONE;
+ drv->last_sect = 1; /* Avoid eventual divide by 0 bugs */
+ }
+ drv->ro = ro;
+ drv->rv = 1;
+}
+
+/* Motor control */
+static void fd_start (fdrive_t *drv)
+{
+ drv->motor = 1;
+}
+
+static void fd_stop (fdrive_t *drv)
+{
+ drv->motor = 0;
+}
+
+/* Re-initialise a drives (motor off, repositioned) */
+static void fd_reset (fdrive_t *drv)
+{
+ fd_stop(drv);
+ fd_recalibrate(drv);
+}
+
+/********************************************************/
+/* Intel 82078 floppy disk controler emulation */
+
+static void fdctrl_reset (int do_irq);
+static void fdctrl_reset_fifo (void);
+static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq);
+static int fdctrl_misc_handler (int duknwo);
+static void fdctrl_raise_irq (uint8_t status);
+
+static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg);
+static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg);
+static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value);
+static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg);
+static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value);
+static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg);
+static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value);
+static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg);
+static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value);
+static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg);
+
+enum {
+ FD_CTRL_ACTIVE = 0x01,
+ FD_CTRL_RESET = 0x02,
+ FD_CTRL_SLEEP = 0x04,
+ FD_CTRL_BUSY = 0x08,
+ FD_CTRL_INTR = 0x10,
+};
+
+enum {
+ FD_DIR_WRITE = 0,
+ FD_DIR_READ = 1,
+ FD_DIR_SCANE = 2,
+ FD_DIR_SCANL = 3,
+ FD_DIR_SCANH = 4,
+};
+
+enum {
+ FD_STATE_CMD = 0x00,
+ FD_STATE_STATUS = 0x01,
+ FD_STATE_DATA = 0x02,
+ FD_STATE_STATE = 0x03,
+ FD_STATE_MULTI = 0x10,
+ FD_STATE_SEEK = 0x20,
+};
+
+#define FD_STATE(state) ((state) & FD_STATE_STATE)
+#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
+#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
+
+typedef struct fdctrl_t {
+ /* Controler's identification */
+ uint8_t version;
+ /* HW */
+ int irq_lvl;
+ int dma_chann;
+ /* Controler state */
+ uint8_t state;
+ uint8_t dma_en;
+ uint8_t cur_drv;
+ uint8_t bootsel;
+ /* Command FIFO */
+ uint8_t fifo[FD_SECTOR_LEN];
+ uint32_t data_pos;
+ uint32_t data_len;
+ uint8_t data_state;
+ uint8_t data_dir;
+ uint8_t int_status;
+ /* States kept only to be returned back */
+ /* Timers state */
+ uint8_t timer0;
+ uint8_t timer1;
+ /* precompensation */
+ uint8_t precomp_trk;
+ uint8_t config;
+ uint8_t lock;
+ /* Power down config (also with status regB access mode */
+ uint8_t pwrd;
+ /* Floppy drives */
+ fdrive_t drives[2];
+} fdctrl_t;
+
+static fdctrl_t fdctrl;
+
+void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base,
+ char boot_device)
+{
+// int io_mem;
+ int i;
+
+ FLOPPY_DPRINTF("init controler\n");
+ memset(&fdctrl, 0, sizeof(fdctrl));
+ fdctrl.version = 0x90; /* Intel 82078 controler */
+ fdctrl.irq_lvl = irq_lvl;
+ fdctrl.dma_chann = dma_chann;
+ fdctrl.config = 0x40; /* Implicit seek, polling & FIFO enabled */
+ if (fdctrl.dma_chann != -1) {
+ fdctrl.dma_en = 1;
+ DMA_register_channel(dma_chann, &fdctrl_transfer_handler,
+ &fdctrl_misc_handler);
+ } else {
+ fdctrl.dma_en = 0;
+ }
+ for (i = 0; i < MAX_FD; i++)
+ fd_init(&fdctrl.drives[i]);
+ fdctrl_reset(0);
+ fdctrl.state = FD_CTRL_ACTIVE;
+ if (mem_mapped) {
+ FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
+#if 0
+ io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
+ cpu_register_physical_memory(base, 0x08, io_mem);
+#endif
+ } else {
+ register_ioport_read(base + 0x01, 1, fdctrl_read_statusB, 1);
+ register_ioport_read(base + 0x02, 1, fdctrl_read_dor, 1);
+ register_ioport_write(base + 0x02, 1, fdctrl_write_dor, 1);
+ register_ioport_read(base + 0x03, 1, fdctrl_read_tape, 1);
+ register_ioport_write(base + 0x03, 1, fdctrl_write_tape, 1);
+ register_ioport_read(base + 0x04, 1, fdctrl_read_main_status, 1);
+ register_ioport_write(base + 0x04, 1, fdctrl_write_rate, 1);
+ register_ioport_read(base + 0x05, 1, fdctrl_read_data, 1);
+ register_ioport_write(base + 0x05, 1, fdctrl_write_data, 1);
+ register_ioport_read(base + 0x07, 1, fdctrl_read_dir, 1);
+ }
+ if (boot_device == 'b')
+ fdctrl.bootsel = 1;
+ else
+ fdctrl.bootsel = 0;
+#if defined (TARGET_I386)
+ cmos_register_fd(fdctrl.drives[0].drive, fdctrl.drives[1].drive);
+#endif
+}
+
+int fdctrl_disk_change (int idx, const unsigned char *filename, int ro)
+{
+ fdrive_t *drv;
+
+ if (idx < 0 || idx > 1)
+ return -1;
+ FLOPPY_DPRINTF("disk %d change: %s (%s)\n", idx, filename,
+ ro == 0 ? "rw" : "ro");
+ drv = &fdctrl.drives[idx];
+ if (fd_table[idx] != NULL) {
+ bdrv_close(fd_table[idx]);
+ fd_table[idx] = NULL;
+ }
+ fd_table[idx] = bdrv_open(filename, ro);
+ drv->bs = fd_table[idx];
+ if (fd_table[idx] == NULL)
+ return -1;
+ fd_revalidate(drv, ro);
+#if 0
+ fd_recalibrate(drv);
+ fdctrl_reset_fifo();
+ fdctrl_raise_irq(0x20);
+#endif
+
+ return 0;
+}
+
+/* Change IRQ state */
+static void fdctrl_reset_irq (void)
+{
+ if (fdctrl.state & FD_CTRL_INTR) {
+ pic_set_irq(fdctrl.irq_lvl, 0);
+ fdctrl.state &= ~(FD_CTRL_INTR | FD_CTRL_SLEEP | FD_CTRL_BUSY);
+ }
+}
+
+static void fdctrl_raise_irq (uint8_t status)
+{
+ if (~(fdctrl.state & FD_CTRL_INTR)) {
+ pic_set_irq(fdctrl.irq_lvl, 1);
+ fdctrl.state |= FD_CTRL_INTR;
+ }
+ FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
+ fdctrl.int_status = status;
+}
+
+/* Reset controler */
+static void fdctrl_reset (int do_irq)
+{
+ int i;
+
+ FLOPPY_DPRINTF("reset controler\n");
+ fdctrl_reset_irq();
+ /* Initialise controler */
+ fdctrl.cur_drv = 0;
+ /* FIFO state */
+ fdctrl.data_pos = 0;
+ fdctrl.data_len = 0;
+ fdctrl.data_state = FD_STATE_CMD;
+ fdctrl.data_dir = FD_DIR_WRITE;
+ for (i = 0; i < MAX_FD; i++)
+ fd_reset(&fdctrl.drives[i]);
+ fdctrl_reset_fifo();
+ if (do_irq)
+ fdctrl_raise_irq(0x20);
+}
+
+/* Status B register : 0x01 (read-only) */
+static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg)
+{
+ fdctrl_reset_irq();
+ FLOPPY_DPRINTF("status register: 0x00\n");
+
+ return 0;
+}
+
+/* Digital output register : 0x02 */
+static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg)
+{
+ fdrive_t *cur_drv, *drv0, *drv1;
+ uint32_t retval = 0;
+
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ /* Drive motors state indicators */
+ retval |= drv1->motor << 5;
+ retval |= drv0->motor << 4;
+ /* DMA enable */
+ retval |= fdctrl.dma_en << 3;
+ /* Reset indicator */
+ retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
+ /* Selected drive */
+ retval |= fdctrl.cur_drv;
+ FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value)
+{
+ fdrive_t *drv0, *drv1;
+
+ fdctrl_reset_irq();
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ /* Reset mode */
+ if (fdctrl.state & FD_CTRL_RESET) {
+ if (!(value & 0x04)) {
+ FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
+ return;
+ }
+ }
+ FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
+ /* Drive motors state indicators */
+ if (value & 0x20)
+ fd_start(drv1);
+ else
+ fd_stop(drv1);
+ if (value & 0x10)
+ fd_start(drv0);
+ else
+ fd_stop(drv0);
+ /* DMA enable */
+#if 0
+ if (fdctrl.dma_chann != -1)
+ fdctrl.dma_en = 1 - ((value >> 3) & 1);
+#endif
+ /* Reset */
+ if (!(value & 0x04)) {
+ if (!(fdctrl.state & FD_CTRL_RESET)) {
+ FLOPPY_DPRINTF("controler enter RESET state\n");
+ fdctrl.state |= FD_CTRL_RESET;
+ fdctrl_reset(1);
+ }
+ } else {
+ if (fdctrl.state & FD_CTRL_RESET) {
+ FLOPPY_DPRINTF("controler out of RESET state\n");
+ fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
+ }
+ }
+ /* Selected drive */
+ fdctrl.cur_drv = value & 1;
+}
+
+/* Tape drive register : 0x03 */
+static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg)
+{
+ uint32_t retval = 0;
+
+ fdctrl_reset_irq();
+ /* Disk boot selection indicator */
+ retval |= fdctrl.bootsel << 2;
+ /* Tape indicators: never allowed */
+ FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value)
+{
+ fdctrl_reset_irq();
+ /* Reset mode */
+ if (fdctrl.state & FD_CTRL_RESET) {
+ FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
+ return;
+ }
+ FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
+ /* Disk boot selection indicator */
+ fdctrl.bootsel = (value >> 2) & 1;
+ /* Tape indicators: never allow */
+}
+
+/* Main status register : 0x04 (read) */
+static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg)
+{
+ uint32_t retval = 0;
+
+ fdctrl_reset_irq();
+ fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
+ if (!(fdctrl.state & FD_CTRL_BUSY)) {
+ /* Data transfer allowed */
+ retval |= 0x80;
+ /* Data transfer direction indicator */
+ if (fdctrl.data_dir == FD_DIR_READ)
+ retval |= 0x40;
+ }
+ /* Should handle 0x20 for SPECIFY command */
+ /* Command busy indicator */
+ if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA ||
+ FD_STATE(fdctrl.data_state) == FD_STATE_STATUS)
+ retval |= 0x10;
+ FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+/* Data select rate register : 0x04 (write) */
+static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value)
+{
+ fdctrl_reset_irq();
+ /* Reset mode */
+ if (fdctrl.state & FD_CTRL_RESET) {
+ if (reg != 0x2 || !(value & 0x04)) {
+ FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
+ return;
+ }
+ }
+ FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
+ /* Reset: autoclear */
+ if (value & 0x80) {
+ fdctrl.state |= FD_CTRL_RESET;
+ fdctrl_reset(1);
+ fdctrl.state &= ~FD_CTRL_RESET;
+ }
+ if (value & 0x40) {
+ fdctrl.state |= FD_CTRL_SLEEP;
+ fdctrl_reset(1);
+ }
+// fdctrl.precomp = (value >> 2) & 0x07;
+}
+
+/* Digital input register : 0x07 (read-only) */
+static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg)
+{
+ fdrive_t *drv0, *drv1;
+ uint32_t retval = 0;
+
+ fdctrl_reset_irq();
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ if (drv0->rv || drv1->rv)
+ retval |= 0x80;
+ if (retval != 0)
+ FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval);
+ drv0->rv = 0;
+ drv1->rv = 0;
+
+ return retval;
+}
+
+/* FIFO state control */
+static void fdctrl_reset_fifo (void)
+{
+ fdctrl.data_dir = FD_DIR_WRITE;
+ fdctrl.data_pos = 0;
+ fdctrl.data_state = FD_STATE_CMD;
+}
+
+/* Set FIFO status for the host to read */
+static void fdctrl_set_fifo (int fifo_len, int do_irq)
+{
+ fdctrl.data_dir = FD_DIR_READ;
+ fdctrl.data_len = fifo_len;
+ fdctrl.data_pos = 0;
+ fdctrl.data_state = FD_STATE_STATUS;
+ if (do_irq)
+ fdctrl_raise_irq(0x00);
+}
+
+/* Set an error: unimplemented/unknown command */
+static void fdctrl_unimplemented (void)
+{
+#if 0
+ fdrive_t *cur_drv, *drv0, *drv1;
+
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv;
+ fdctrl.fifo[1] = 0x00;
+ fdctrl.fifo[2] = 0x00;
+ fdctrl_set_fifo(3, 1);
+#else
+ fdctrl_reset_fifo();
+#endif
+}
+
+/* Callback for transfer end (stop or abort) */
+static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1,
+ uint8_t status2)
+{
+ fdrive_t *cur_drv, *drv0, *drv1;
+
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
+ status0, status1, status2,
+ status0 | (cur_drv->head << 1) | fdctrl.cur_drv);
+ fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv;
+ fdctrl.fifo[1] = status1;
+ fdctrl.fifo[2] = status2;
+ fdctrl.fifo[3] = cur_drv->track;
+ fdctrl.fifo[4] = cur_drv->head;
+ fdctrl.fifo[5] = cur_drv->sect;
+ fdctrl.fifo[6] = FD_SECTOR_SC;
+ fdctrl.data_dir = FD_DIR_READ;
+ if (fdctrl.state & FD_CTRL_BUSY)
+ DMA_release_DREQ(fdctrl.dma_chann);
+ fdctrl_set_fifo(7, 1);
+}
+
+/* Prepare a data transfer (either DMA or FIFO) */
+static void fdctrl_start_transfer (int direction)
+{
+ fdrive_t *cur_drv, *drv0, *drv1;
+ uint8_t kh, kt, ks;
+ int did_seek;
+
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ fdctrl.cur_drv = fdctrl.fifo[1] & 1;
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ kt = fdctrl.fifo[2];
+ kh = fdctrl.fifo[3];
+ ks = fdctrl.fifo[4];
+ FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
+ fdctrl.cur_drv, kh, kt, ks,
+ _fd_sector(kh, kt, ks, cur_drv->last_sect));
+ did_seek = 0;
+ switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) {
+ case 2:
+ /* sect too big */
+ fdctrl_stop_transfer(0x40, 0x00, 0x00);
+ fdctrl.fifo[3] = kt;
+ fdctrl.fifo[4] = kh;
+ fdctrl.fifo[5] = ks;
+ return;
+ case 3:
+ /* track too big */
+ fdctrl_stop_transfer(0x40, 0x80, 0x00);
+ fdctrl.fifo[3] = kt;
+ fdctrl.fifo[4] = kh;
+ fdctrl.fifo[5] = ks;
+ return;
+ case 4:
+ /* No seek enabled */
+ fdctrl_stop_transfer(0x40, 0x00, 0x00);
+ fdctrl.fifo[3] = kt;
+ fdctrl.fifo[4] = kh;
+ fdctrl.fifo[5] = ks;
+ return;
+ case 1:
+ did_seek = 1;
+ break;
+ default:
+ break;
+ }
+ /* Set the FIFO state */
+ fdctrl.data_dir = direction;
+ fdctrl.data_pos = 0;
+ fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */
+ if (fdctrl.fifo[0] & 0x80)
+ fdctrl.data_state |= FD_STATE_MULTI;
+ if (did_seek)
+ fdctrl.data_state |= FD_STATE_SEEK;
+ if (fdctrl.dma_en) {
+ int dma_mode;
+ /* DMA transfer are enabled. Check if DMA channel is well programmed */
+ dma_mode = DMA_get_channel_mode(fdctrl.dma_chann);
+ dma_mode = (dma_mode >> 2) & 3;
+ FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction,
+ (128 << fdctrl.fifo[5]) *
+ (cur_drv->last_sect - ks + 1));
+ if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
+ direction == FD_DIR_SCANH) && dma_mode == 0) ||
+ (direction == FD_DIR_WRITE && dma_mode == 2) ||
+ (direction == FD_DIR_READ && dma_mode == 1)) {
+ /* No access is allowed until DMA transfer has completed */
+ fdctrl.state |= FD_CTRL_BUSY;
+ /* Now, we just have to wait for the DMA controler to
+ * recall us...
+ */
+ DMA_hold_DREQ(fdctrl.dma_chann);
+ return;
+ }
+ }
+ FLOPPY_DPRINTF("start non-DMA transfer\n");
+ /* IO based transfer: calculate len */
+ if (fdctrl.fifo[5] == 00) {
+ fdctrl.data_len = fdctrl.fifo[8];
+ } else {
+ fdctrl.data_len = 128 << fdctrl.fifo[5];
+ fdctrl.data_len *= (cur_drv->last_sect - ks + 1);
+ if (fdctrl.fifo[0] & 0x80)
+ fdctrl.data_len *= 2;
+ }
+ fdctrl_raise_irq(0x00);
+
+ return;
+}
+
+/* Prepare a transfer of deleted data */
+static void fdctrl_start_transfer_del (int direction)
+{
+ /* We don't handle deleted data,
+ * so we don't return *ANYTHING*
+ */
+ fdctrl_stop_transfer(0x60, 0x00, 0x00);
+}
+
+/* handlers for DMA transfers */
+static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq)
+{
+ fdrive_t *cur_drv, *drv0, *drv1;
+ void *orig;
+ int len;
+ uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
+
+ fdctrl_reset_irq();
+ if (!(fdctrl.state & FD_CTRL_BUSY)) {
+ FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
+ return 0;
+ }
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+// *irq = fdctrl.irq_lvl;
+ *irq = -1;
+ if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL ||
+ fdctrl.data_dir == FD_DIR_SCANH)
+ status2 = 0x04;
+ for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len;
+ fdctrl.data_pos += len) {
+ len = size - fdctrl.data_pos;
+ if (len > FD_SECTOR_LEN)
+ len = FD_SECTOR_LEN;
+ FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
+ "(%d-0x%08x)\n", len, size, fdctrl.data_pos,
+ fdctrl.data_len, fdctrl.cur_drv, cur_drv->head,
+ cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
+ fd_sector(cur_drv) * 512);
+ if (len < FD_SECTOR_LEN) {
+ memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0,
+ FD_SECTOR_LEN - len - 1);
+ orig = fdctrl.fifo;
+ } else {
+ orig = (void *)(addr + fdctrl.data_pos);
+ }
+ if (fdctrl.data_dir != FD_DIR_WRITE) {
+ /* READ & SCAN commands */
+ if (cur_drv->bs == NULL ||
+ bdrv_read(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) {
+ FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
+ fd_sector(cur_drv));
+ /* Sure, image size is too small... */
+ memset((void *)(addr + fdctrl.data_pos), 0, FD_SECTOR_LEN);
+ }
+ if (fdctrl.data_dir == FD_DIR_READ) {
+ if (len < FD_SECTOR_LEN) {
+ memcpy((void *)(addr + fdctrl.data_pos),
+ fdctrl.fifo, FD_SECTOR_LEN);
+ }
+ } else {
+ int ret;
+ ret = memcmp((void *)(addr + fdctrl.data_pos),
+ fdctrl.fifo, FD_SECTOR_LEN);
+ if (ret == 0) {
+ status2 = 0x08;
+ goto end_transfer;
+ }
+ if ((ret < 0 && fdctrl.data_dir == FD_DIR_SCANL) ||
+ (ret > 0 && fdctrl.data_dir == FD_DIR_SCANH)) {
+ status2 = 0x00;
+ goto end_transfer;
+ }
+ }
+ } else {
+ /* WRITE commands */
+ if (cur_drv->bs == NULL ||
+ bdrv_write(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) {
+ FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
+ fdctrl_stop_transfer(0x60, 0x00, 0x00);
+ goto transfer_error;
+ }
+ }
+ if (len == FD_SECTOR_LEN) {
+ /* Seek to next sector */
+ if (cur_drv->sect == cur_drv->last_sect) {
+ if (cur_drv->head == 0) {
+ cur_drv->head = 1;
+ } else {
+ cur_drv->track++;
+ cur_drv->head = 0;
+ }
+ cur_drv->sect = 1;
+ FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
+ cur_drv->head, cur_drv->track, cur_drv->sect,
+ fd_sector(cur_drv));
+ if (cur_drv->head == 0) {
+ FLOPPY_DPRINTF("end transfer\n");
+ goto end_transfer;
+ }
+ if (!FD_MULTI_TRACK(fdctrl.data_state)) {
+ /* Single track read */
+ FLOPPY_DPRINTF("single track transfert: end transfer\n");
+// status1 |= 0x80;
+ goto end_transfer;
+ }
+ } else {
+ cur_drv->sect++;
+ FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
+ cur_drv->head, cur_drv->track, cur_drv->sect,
+ fd_sector(cur_drv));
+ }
+ }
+ }
+end_transfer:
+ if (fdctrl.data_dir == FD_DIR_SCANE ||
+ fdctrl.data_dir == FD_DIR_SCANL ||
+ fdctrl.data_dir == FD_DIR_SCANH)
+ status2 = 0x08;
+ if (FD_DID_SEEK(fdctrl.data_state))
+ status0 |= 0x20;
+ fdctrl_stop_transfer(status0, status1, status2);
+transfer_error:
+
+ return fdctrl.data_pos;
+}
+
+/* Unused... */
+static int fdctrl_misc_handler (int duknwo)
+{
+ return -1;
+}
+
+/* Data register : 0x05 */
+static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg)
+{
+ fdrive_t *cur_drv, *drv0, *drv1;
+ uint32_t retval = 0;
+ int pos, len;
+
+ fdctrl_reset_irq();
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ fdctrl.state &= ~FD_CTRL_SLEEP;
+ if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) {
+ FLOPPY_ERROR("can't read data in CMD state\n");
+ return 0;
+ }
+ pos = fdctrl.data_pos;
+ if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
+ pos %= FD_SECTOR_LEN;
+ if (pos == 0) {
+ len = fdctrl.data_len - fdctrl.data_pos;
+ if (len > FD_SECTOR_LEN)
+ len = FD_SECTOR_LEN;
+ bdrv_read(cur_drv->bs, fd_sector(cur_drv),
+ fdctrl.fifo, len);
+ }
+ }
+ retval = fdctrl.fifo[pos];
+ if (++fdctrl.data_pos == fdctrl.data_len) {
+ fdctrl.data_pos = 0;
+ /* Switch from transfert mode to status mode
+ * then from status mode to command mode
+ */
+ if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
+ fdctrl_stop_transfer(0x20, 0x00, 0x00);
+ else
+ fdctrl_reset_fifo();
+ }
+ FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value)
+{
+ fdrive_t *cur_drv, *drv0, *drv1;
+
+ fdctrl_reset_irq();
+ drv0 = &fdctrl.drives[fdctrl.bootsel];
+ drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ /* Reset mode */
+ if (fdctrl.state & FD_CTRL_RESET) {
+ FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
+ return;
+ }
+ fdctrl.state &= ~FD_CTRL_SLEEP;
+ if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) {
+ FLOPPY_ERROR("can't write data in status mode\n");
+ return;
+ }
+ /* Is it write command time ? */
+ if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
+ /* FIFO data write */
+ fdctrl.fifo[fdctrl.data_pos++] = value;
+ if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
+ fdctrl.data_pos == fdctrl.data_len) {
+ bdrv_write(cur_drv->bs, fd_sector(cur_drv),
+ fdctrl.fifo, FD_SECTOR_LEN);
+ }
+ /* Switch from transfert mode to status mode
+ * then from status mode to command mode
+ */
+ if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
+ fdctrl_stop_transfer(0x20, 0x00, 0x00);
+ return;
+ }
+ if (fdctrl.data_pos == 0) {
+ /* Command */
+ switch (value & 0x5F) {
+ case 0x46:
+ /* READ variants */
+ FLOPPY_DPRINTF("READ command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x4C:
+ /* READ_DELETED variants */
+ FLOPPY_DPRINTF("READ_DELETED command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x50:
+ /* SCAN_EQUAL variants */
+ FLOPPY_DPRINTF("SCAN_EQUAL command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x56:
+ /* VERIFY variants */
+ FLOPPY_DPRINTF("VERIFY command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x59:
+ /* SCAN_LOW_OR_EQUAL variants */
+ FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x5D:
+ /* SCAN_HIGH_OR_EQUAL variants */
+ FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ default:
+ break;
+ }
+ switch (value & 0x7F) {
+ case 0x45:
+ /* WRITE variants */
+ FLOPPY_DPRINTF("WRITE command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x49:
+ /* WRITE_DELETED variants */
+ FLOPPY_DPRINTF("WRITE_DELETED command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ default:
+ break;
+ }
+ switch (value) {
+ case 0x03:
+ /* SPECIFY */
+ FLOPPY_DPRINTF("SPECIFY command\n");
+ /* 1 parameter cmd */
+ fdctrl.data_len = 3;
+ goto enqueue;
+ case 0x04:
+ /* SENSE_DRIVE_STATUS */
+ FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
+ /* 1 parameter cmd */
+ fdctrl.data_len = 2;
+ goto enqueue;
+ case 0x07:
+ /* RECALIBRATE */
+ FLOPPY_DPRINTF("RECALIBRATE command\n");
+ /* 1 parameter cmd */
+ fdctrl.data_len = 2;
+ goto enqueue;
+ case 0x08:
+ /* SENSE_INTERRUPT_STATUS */
+ FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
+ fdctrl.int_status);
+ /* No parameters cmd: returns status if no interrupt */
+ fdctrl.fifo[0] =
+ fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv;
+ fdctrl.fifo[1] = cur_drv->track;
+ fdctrl_set_fifo(2, 0);
+ return;
+ case 0x0E:
+ /* DUMPREG */
+ FLOPPY_DPRINTF("DUMPREG command\n");
+ /* Drives position */
+ fdctrl.fifo[0] = drv0->track;
+ fdctrl.fifo[1] = drv1->track;
+ fdctrl.fifo[2] = 0;
+ fdctrl.fifo[3] = 0;
+ /* timers */
+ fdctrl.fifo[4] = fdctrl.timer0;
+ fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en;
+ fdctrl.fifo[6] = cur_drv->last_sect;
+ fdctrl.fifo[7] = (fdctrl.lock << 7) |
+ (cur_drv->perpendicular << 2);
+ fdctrl.fifo[8] = fdctrl.config;
+ fdctrl.fifo[9] = fdctrl.precomp_trk;
+ fdctrl_set_fifo(10, 0);
+ return;
+ case 0x0F:
+ /* SEEK */
+ FLOPPY_DPRINTF("SEEK command\n");
+ /* 2 parameters cmd */
+ fdctrl.data_len = 3;
+ goto enqueue;
+ case 0x10:
+ /* VERSION */
+ FLOPPY_DPRINTF("VERSION command\n");
+ /* No parameters cmd */
+ /* Controler's version */
+ fdctrl.fifo[0] = fdctrl.version;
+ fdctrl_set_fifo(1, 1);
+ return;
+ case 0x12:
+ /* PERPENDICULAR_MODE */
+ FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
+ /* 1 parameter cmd */
+ fdctrl.data_len = 2;
+ goto enqueue;
+ case 0x13:
+ /* CONFIGURE */
+ FLOPPY_DPRINTF("CONFIGURE command\n");
+ /* 3 parameters cmd */
+ fdctrl.data_len = 4;
+ goto enqueue;
+ case 0x14:
+ /* UNLOCK */
+ FLOPPY_DPRINTF("UNLOCK command\n");
+ /* No parameters cmd */
+ fdctrl.lock = 0;
+ fdctrl.fifo[0] = 0;
+ fdctrl_set_fifo(1, 0);
+ return;
+ case 0x17:
+ /* POWERDOWN_MODE */
+ FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
+ /* 2 parameters cmd */
+ fdctrl.data_len = 3;
+ goto enqueue;
+ case 0x18:
+ /* PART_ID */
+ FLOPPY_DPRINTF("PART_ID command\n");
+ /* No parameters cmd */
+ fdctrl.fifo[0] = 0x41; /* Stepping 1 */
+ fdctrl_set_fifo(1, 0);
+ return;
+ case 0x2C:
+ /* SAVE */
+ FLOPPY_DPRINTF("SAVE command\n");
+ /* No parameters cmd */
+ fdctrl.fifo[0] = 0;
+ fdctrl.fifo[1] = 0;
+ /* Drives position */
+ fdctrl.fifo[2] = drv0->track;
+ fdctrl.fifo[3] = drv1->track;
+ fdctrl.fifo[4] = 0;
+ fdctrl.fifo[5] = 0;
+ /* timers */
+ fdctrl.fifo[6] = fdctrl.timer0;
+ fdctrl.fifo[7] = fdctrl.timer1;
+ fdctrl.fifo[8] = cur_drv->last_sect;
+ fdctrl.fifo[9] = (fdctrl.lock << 7) |
+ (cur_drv->perpendicular << 2);
+ fdctrl.fifo[10] = fdctrl.config;
+ fdctrl.fifo[11] = fdctrl.precomp_trk;
+ fdctrl.fifo[12] = fdctrl.pwrd;
+ fdctrl.fifo[13] = 0;
+ fdctrl.fifo[14] = 0;
+ fdctrl_set_fifo(15, 1);
+ return;
+ case 0x33:
+ /* OPTION */
+ FLOPPY_DPRINTF("OPTION command\n");
+ /* 1 parameter cmd */
+ fdctrl.data_len = 2;
+ goto enqueue;
+ case 0x42:
+ /* READ_TRACK */
+ FLOPPY_DPRINTF("READ_TRACK command\n");
+ /* 8 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x4A:
+ /* READ_ID */
+ FLOPPY_DPRINTF("READ_ID command\n");
+ /* 1 parameter cmd */
+ fdctrl.data_len = 2;
+ goto enqueue;
+ case 0x4C:
+ /* RESTORE */
+ FLOPPY_DPRINTF("RESTORE command\n");
+ /* 17 parameters cmd */
+ fdctrl.data_len = 18;
+ goto enqueue;
+ case 0x4D:
+ /* FORMAT_TRACK */
+ FLOPPY_DPRINTF("FORMAT_TRACK command\n");
+ /* 5 parameters cmd */
+ fdctrl.data_len = 9;
+ goto enqueue;
+ case 0x8E:
+ /* DRIVE_SPECIFICATION_COMMAND */
+ FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
+ /* 5 parameters cmd */
+ fdctrl.data_len = 6;
+ goto enqueue;
+ case 0x8F:
+ /* RELATIVE_SEEK_OUT */
+ FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
+ /* 2 parameters cmd */
+ fdctrl.data_len = 3;
+ goto enqueue;
+ case 0x94:
+ /* LOCK */
+ FLOPPY_DPRINTF("LOCK command\n");
+ /* No parameters cmd */
+ fdctrl.lock = 1;
+ fdctrl.fifo[0] = 0x10;
+ fdctrl_set_fifo(1, 1);
+ return;
+ case 0xCD:
+ /* FORMAT_AND_WRITE */
+ FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
+ /* 10 parameters cmd */
+ fdctrl.data_len = 11;
+ goto enqueue;
+ case 0xCF:
+ /* RELATIVE_SEEK_IN */
+ FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
+ /* 2 parameters cmd */
+ fdctrl.data_len = 3;
+ goto enqueue;
+ default:
+ /* Unknown command */
+ FLOPPY_ERROR("unknown command: 0x%02x\n", value);
+ fdctrl_unimplemented();
+ return;
+ }
+ }
+enqueue:
+ fdctrl.fifo[fdctrl.data_pos] = value;
+ if (++fdctrl.data_pos == fdctrl.data_len) {
+ /* We now have all parameters
+ * and will be able to treat the command
+ */
+ switch (fdctrl.fifo[0] & 0x1F) {
+ case 0x06:
+ {
+ /* READ variants */
+ FLOPPY_DPRINTF("treat READ command\n");
+ fdctrl_start_transfer(FD_DIR_READ);
+ return;
+ }
+ case 0x0C:
+ /* READ_DELETED variants */
+// FLOPPY_DPRINTF("treat READ_DELETED command\n");
+ FLOPPY_ERROR("treat READ_DELETED command\n");
+ fdctrl_start_transfer_del(1);
+ return;
+ case 0x16:
+ /* VERIFY variants */
+// FLOPPY_DPRINTF("treat VERIFY command\n");
+ FLOPPY_ERROR("treat VERIFY command\n");
+ fdctrl_stop_transfer(0x20, 0x00, 0x00);
+ return;
+ case 0x10:
+ /* SCAN_EQUAL variants */
+// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
+ FLOPPY_ERROR("treat SCAN_EQUAL command\n");
+ fdctrl_start_transfer(FD_DIR_SCANE);
+ return;
+ case 0x19:
+ /* SCAN_LOW_OR_EQUAL variants */
+// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
+ FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
+ fdctrl_start_transfer(FD_DIR_SCANL);
+ return;
+ case 0x1D:
+ /* SCAN_HIGH_OR_EQUAL variants */
+// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
+ FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
+ fdctrl_start_transfer(FD_DIR_SCANH);
+ return;
+ default:
+ break;
+ }
+ switch (fdctrl.fifo[0] & 0x3F) {
+ case 0x05:
+ /* WRITE variants */
+ FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]);
+ fdctrl_start_transfer(FD_DIR_WRITE);
+ return;
+ case 0x09:
+ /* WRITE_DELETED variants */
+// FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
+ FLOPPY_ERROR("treat WRITE_DELETED command\n");
+ fdctrl_start_transfer_del(FD_DIR_WRITE);
+ return;
+ default:
+ break;
+ }
+ switch (fdctrl.fifo[0]) {
+ case 0x03:
+ /* SPECIFY */
+ FLOPPY_DPRINTF("treat SPECIFY command\n");
+ fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF;
+ fdctrl.timer1 = fdctrl.fifo[1] >> 1;
+ /* No result back */
+ fdctrl_reset_fifo();
+ break;
+ case 0x04:
+ /* SENSE_DRIVE_STATUS */
+ FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
+ fdctrl.cur_drv = fdctrl.fifo[1] & 1;
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
+ /* 1 Byte status back */
+ fdctrl.fifo[0] = (cur_drv->ro << 6) |
+ (cur_drv->track == 0 ? 0x10 : 0x00) |
+ fdctrl.cur_drv;
+ fdctrl_set_fifo(1, 0);
+ break;
+ case 0x07:
+ /* RECALIBRATE */
+ FLOPPY_DPRINTF("treat RECALIBRATE command\n");
+ fdctrl.cur_drv = fdctrl.fifo[1] & 1;
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ fd_recalibrate(cur_drv);
+ fdctrl_reset_fifo();
+ /* Raise Interrupt */
+ fdctrl_raise_irq(0x20);
+ break;
+ case 0x0F:
+ /* SEEK */
+ FLOPPY_DPRINTF("treat SEEK command\n");
+ fdctrl.cur_drv = fdctrl.fifo[1] & 1;
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ if (fdctrl.fifo[2] <= cur_drv->track)
+ cur_drv->dir = 1;
+ else
+ cur_drv->dir = 0;
+ cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
+ if (fdctrl.fifo[2] > cur_drv->max_track) {
+ fdctrl_raise_irq(0x60);
+ } else {
+ cur_drv->track = fdctrl.fifo[2];
+ fdctrl_reset_fifo();
+ /* Raise Interrupt */
+ fdctrl_raise_irq(0x20);
+ }
+ break;
+ case 0x12:
+ /* PERPENDICULAR_MODE */
+ FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
+ if (fdctrl.fifo[1] & 0x80)
+ cur_drv->perpendicular = fdctrl.fifo[1] & 0x7;
+ /* No result back */
+ fdctrl_reset_fifo();
+ break;
+ case 0x13:
+ /* CONFIGURE */
+ FLOPPY_DPRINTF("treat CONFIGURE command\n");
+ fdctrl.config = fdctrl.fifo[2];
+ fdctrl.precomp_trk = fdctrl.fifo[3];
+ /* No result back */
+ fdctrl_reset_fifo();
+ break;
+ case 0x17:
+ /* POWERDOWN_MODE */
+ FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
+ fdctrl.pwrd = fdctrl.fifo[1];
+ fdctrl.fifo[0] = fdctrl.fifo[1];
+ fdctrl_set_fifo(1, 1);
+ break;
+ case 0x33:
+ /* OPTION */
+ FLOPPY_DPRINTF("treat OPTION command\n");
+ /* No result back */
+ fdctrl_reset_fifo();
+ break;
+ case 0x42:
+ /* READ_TRACK */
+// FLOPPY_DPRINTF("treat READ_TRACK command\n");
+ FLOPPY_ERROR("treat READ_TRACK command\n");
+ fdctrl_unimplemented();
+ break;
+ case 0x4A:
+ /* READ_ID */
+// FLOPPY_DPRINTF("treat READ_ID command\n");
+ FLOPPY_ERROR("treat READ_ID command\n");
+ fdctrl_stop_transfer(0x00, 0x00, 0x00);
+ break;
+ case 0x4C:
+ /* RESTORE */
+ FLOPPY_DPRINTF("treat RESTORE command\n");
+ /* Drives position */
+ drv0->track = fdctrl.fifo[3];
+ drv1->track = fdctrl.fifo[4];
+ /* timers */
+ fdctrl.timer0 = fdctrl.fifo[7];
+ fdctrl.timer1 = fdctrl.fifo[8];
+ cur_drv->last_sect = fdctrl.fifo[9];
+ fdctrl.lock = fdctrl.fifo[10] >> 7;
+ cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF;
+ fdctrl.config = fdctrl.fifo[11];
+ fdctrl.precomp_trk = fdctrl.fifo[12];
+ fdctrl.pwrd = fdctrl.fifo[13];
+ fdctrl_reset_fifo();
+ break;
+ case 0x4D:
+ /* FORMAT_TRACK */
+// FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
+ FLOPPY_ERROR("treat FORMAT_TRACK command\n");
+ fdctrl_unimplemented();
+ break;
+ case 0x8E:
+ /* DRIVE_SPECIFICATION_COMMAND */
+ FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
+ if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) {
+ /* Command parameters done */
+ if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) {
+ fdctrl.fifo[0] = fdctrl.fifo[1];
+ fdctrl.fifo[2] = 0;
+ fdctrl.fifo[3] = 0;
+ fdctrl_set_fifo(4, 1);
+ } else {
+ fdctrl_reset_fifo();
+ }
+ } else if (fdctrl.data_len > 7) {
+ /* ERROR */
+ fdctrl.fifo[0] = 0x80 |
+ (cur_drv->head << 2) | fdctrl.cur_drv;
+ fdctrl_set_fifo(1, 1);
+ }
+ break;
+ case 0x8F:
+ /* RELATIVE_SEEK_OUT */
+ FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
+ fdctrl.cur_drv = fdctrl.fifo[1] & 1;
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
+ if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) {
+ /* ERROR */
+ fdctrl_raise_irq(0x70);
+ } else {
+ cur_drv->track += fdctrl.fifo[2];
+ cur_drv->dir = 0;
+ fdctrl_reset_fifo();
+ fdctrl_raise_irq(0x20);
+ }
+ break;
+ case 0xCD:
+ /* FORMAT_AND_WRITE */
+// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
+ FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
+ fdctrl_unimplemented();
+ break;
+ case 0xCF:
+ /* RELATIVE_SEEK_IN */
+ FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
+ fdctrl.cur_drv = fdctrl.fifo[1] & 1;
+ cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
+ cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
+ if (fdctrl.fifo[2] > cur_drv->track) {
+ /* ERROR */
+ fdctrl_raise_irq(0x60);
+ } else {
+ fdctrl_reset_fifo();
+ cur_drv->track -= fdctrl.fifo[2];
+ cur_drv->dir = 1;
+ /* Raise Interrupt */
+ fdctrl_raise_irq(0x20);
+ }
+ break;
+ }
+ }
+}
