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| author | Nikolay Nikolov <nickysn@users.sourceforge.net> | 2018-02-04 17:26:58 +0200 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2018-02-07 21:16:17 -0500 |
| commit | 53fc631307b2c4a403e183afcc5ffe27987349a6 (patch) | |
| tree | 1fad02636929d96df8483742b1facb34c0d6865e | |
| parent | 5157a7882de8b50c2365fd9166c5d91861a478a2 (diff) | |
| download | seabios-53fc631307b2c4a403e183afcc5ffe27987349a6.tar.gz | |
floppy: Introduce FLOPPY_DOR_XXX constants
Signed-off-by: Nikolay Nikolov <nickysn@users.sourceforge.net>
| -rw-r--r-- | src/hw/floppy.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/src/hw/floppy.c b/src/hw/floppy.c index f45676e2..992983dc 100644 --- a/src/hw/floppy.c +++ b/src/hw/floppy.c @@ -35,6 +35,15 @@ #define FLOPPY_FORMAT_GAPLEN 0x6c #define FLOPPY_PIO_TIMEOUT 1000 +#define FLOPPY_DOR_MOTOR_D 0x80 // Set to turn drive 3's motor ON +#define FLOPPY_DOR_MOTOR_C 0x40 // Set to turn drive 2's motor ON +#define FLOPPY_DOR_MOTOR_B 0x20 // Set to turn drive 1's motor ON +#define FLOPPY_DOR_MOTOR_A 0x10 // Set to turn drive 0's motor ON +#define FLOPPY_DOR_MOTOR_MASK 0xf0 +#define FLOPPY_DOR_IRQ 0x08 // Set to enable IRQs and DMA +#define FLOPPY_DOR_RESET 0x04 // Clear = enter reset mode, Set = normal operation +#define FLOPPY_DOR_DSEL_MASK 0x03 // "Select" drive number for next access + // New diskette parameter table adding 3 parameters from IBM // Since no provisions are made for multiple drive types, most // values in this table are ignored. I set parameters for 1.44M @@ -316,7 +325,7 @@ floppy_enable_controller(void) dprintf(2, "Floppy_enable_controller\n"); SET_BDA(floppy_motor_counter, FLOPPY_MOTOR_TICKS); floppy_dor_write(0x00); - floppy_dor_write(0x0c); + floppy_dor_write(FLOPPY_DOR_IRQ | FLOPPY_DOR_RESET); int ret = floppy_wait_irq(); if (ret) return ret; @@ -330,7 +339,7 @@ static int floppy_drive_pio(u8 floppyid, int command, u8 *param) { // Enable controller if it isn't running. - if (!(floppy_dor_read() & 0x04)) { + if (!(floppy_dor_read() & FLOPPY_DOR_RESET)) { int ret = floppy_enable_controller(); if (ret) return ret; @@ -340,7 +349,7 @@ floppy_drive_pio(u8 floppyid, int command, u8 *param) SET_BDA(floppy_motor_counter, FLOPPY_MOTOR_TICKS); // Turn on motor of selected drive, DMA & int enabled, normal operation - floppy_dor_write((floppyid ? 0x20 : 0x10) | 0x0c | floppyid); + floppy_dor_write((floppyid ? FLOPPY_DOR_MOTOR_B : FLOPPY_DOR_MOTOR_A) | FLOPPY_DOR_IRQ | FLOPPY_DOR_RESET | floppyid); // Send command. int ret = floppy_pio(command, param); @@ -680,6 +689,6 @@ floppy_tick(void) SET_BDA(floppy_motor_counter, fcount); if (fcount == 0) // turn motor(s) off - floppy_dor_mask(0xf0, 0); + floppy_dor_mask(FLOPPY_DOR_MOTOR_MASK, 0); } } |