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Diffstat (limited to 'Floppy.HH')
| -rw-r--r-- | Floppy.HH | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/Floppy.HH b/Floppy.HH deleted file mode 100644 index 4e5cfdb..0000000 --- a/Floppy.HH +++ /dev/null @@ -1,98 +0,0 @@ -// FDC uses IRQ6 = int 26h -#define I_FDC 0x26 -#define IRQ_FDC 6 - -// FDC regs (primary ctrlr) -#define FDC_STAT_A 0x0 -#define FDC_STAT_B 0x1 -#define FDC_DOR 0x2 -#define FDC_TAPE 0x3 -#define FDC_MSR_DSR 0x4 -#define FDC_DATA 0x5 -#define FDC_CCR_DIR 0x7 - -// FDC cmds -#define FDC_READ_TRACK 0x02 -#define FDC_SPECIFY 0x03 -#define FDC_SENSE_STAT 0x04 -#define FDC_WRITE_DATA 0x05 -#define FDC_READ_DATA 0x06 -#define FDC_RECALIBRATE 0x07 -#define FDC_SENSE_INTR 0x08 -#define FDC_WRITE_DEL 0x09 -#define FDC_READ_ID 0x0A -#define FDC_READ_DEL 0x0C -#define FDC_FMT_TRACK 0x0D -#define FDC_DUMP_REG 0x0E -#define FDC_SEEK 0x0F -#define FDC_VERSION 0x10 -#define FDC_SCAN_EQL 0x11 -#define FDC_PERP_MODE 0x12 -#define FDC_CONFIGURE 0x13 -#define FDC_LOCK 0x14 -#define FDC_VERIFY 0x16 -#define FDC_SCAN_LO_EQL 0x19 -#define FDC_SCAN_HI_EQL 0x1D - -// Motor stuff -#define FDC_MOTOR_OFF 0 -#define FDC_MOTOR_ON 1 -#define FDC_MOTOR_WAIT 2 - -// Read/write directions -#define FDC_DIR_READ 0 -#define FDC_DIR_WRITE 1 - -// Digital Output Register (DOR) flags - -// DOR motor control flags: 1 = on, 0 = off -#define FDC_DOR_MOTD 0x80 // Drive D -#define FDC_DOR_MOTC 0x40 // Drive C -#define FDC_DOR_MOTB 0x20 // Drive B -#define FDC_DOR_MOTA 0x10 // Drive A - -// other DOR flags -#define FDC_DOR_DMA 0x08 // DMA2/IRQ6 On/Off -#define FDC_DOR_REST 0x04 // Controller Reset: this is active low; 1 = normal, 0 = reset - -// DOR drive select (DOR & 0x03): selects drive 0-3 - -// Main Status Register (MSR) flags -#define FDC_MSR_RQM 0x80 // Main Request: 1 = ready, 0 = not ready -#define FDC_MSR_DIO 0x40 // Data In/Out: 1 = FDC -> PC, 0 = PC -> FDC -#define FDC_MSR_NDMA 0x20 // Non-DMA: 1 = DMA off, 0 = DMA on -#define FDC_MSR_BUSY 0x10 // Device busy: self-explanatory - -// MSR drive seek flags: 1 = seeking, 0 = idle -#define FDC_MSR_ACTD 0x08 // Drive D -#define FDC_MSR_ACTC 0x04 // Drive C -#define FDC_MSR_ACTB 0x02 // Drive B -#define FDC_MSR_ACTA 0x01 // Drive A - -// Status Register 0 (ST0) flags - -/* ST0 interrupt code (ST0 & 0xC0): - 00 = normal termination - 01 = abnormal termination - 10 = invalid cmd - 11 = abnormal termination by poilling (drive became not ready) -*/ - -#define FDC_ST0_SEEK_END 0x20 // Seek End: seek/calibration completed -#define FDC_ST0_UNIT_CHK 0x10 // Unit Check: drive encountered a fault or recalibration failed -#define FDC_ST0_NOT_RDY 0x08 // Not Ready: self-explanatory -#define FDC_ST0_HEAD 0x04 // Active Head - -// ST0 unit select (ST0 & 0x03): same fmt as DOR drive select - -// Status Register 1 (ST1) flags -#define FDC_ST1_END_CYL 0x80 // End of Cylinder: set when sector count > sectors on track -// 0x40 is unused -#define FDC_ST1_DATA_ERR 0x20 // Data Error: set when an error is detected in a sector's data or ID fields -#define FDC_ST1_TIMEOUT 0x10 // Timeout: set when a data overrun occurs (i.e. the system is not reading data fast enough) -// 0x08 is unused -#define FDC_ST1_NO_DATA 0x04 // No Data: set when either a sector cannot be read, or an ID cannot be successfully read, or if the sector sequence cannot be determined -#define FDC_ST1_NO_WRITE 0x02 // Not Writable: set when attempting to write to a write-protected disk -#define FDC_ST1_NO_ID 0x01 // No Addr. Mark: set when an ID/(deleted) data address mark cannot be found. - -// Status Register 2 (ST2) flags
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