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Several changes...

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1. We have much more logging.
2. We were not properly turning off drives when we would get called with
   C0x8.
3. We now roll over sector pos if we are greater than ENC_ETRACK.
4. We now reset sector pos when we step.
This commit is contained in:
Peter Evans 2018-03-30 16:07:58 -05:00
parent d2047457e9
commit 523b9c4a03
1 changed files with 19 additions and 3 deletions
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22
src/apple2.dd.c
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@ -281,6 +281,10 @@ apple2_dd_phaser(apple2dd *drive, int phase)
int step = transitions[(drive->phase * 5) + phase];
apple2_dd_step(drive, step);
log_info("Phase %1d, step %2d, track %2d, sector pos %05x, segment position %05x",
phase, step, drive->track_pos / 2, drive->sector_pos,
apple2_dd_position(drive));
// Record this new phase for the next time we make a transition
drive->phase = phase;
}
@ -316,6 +320,12 @@ apple2_dd_read(apple2dd *drive)
}
vm_8bit byte = vm_segment_get(drive->data, apple2_dd_position(drive));
drive->latch = byte;
log_info("Read byte %02x at track %2d, sector %2d, position %05x",
byte, drive->track_pos / 2, drive->sector_pos / ENC_ESECTOR,
apple2_dd_position(drive));
apple2_dd_shift(drive, 1);
return byte;
@ -385,7 +395,7 @@ apple2_dd_shift(apple2dd *drive, int pos)
drive->sector_pos += pos;
if (drive->sector_pos >= ENC_ETRACK) {
if (drive->sector_pos > ENC_ETRACK) {
// We need to reset the sector pos to zero, because...
drive->sector_pos = 0;
}
@ -408,6 +418,8 @@ apple2_dd_step(apple2dd *drive, int steps)
} else if (drive->track_pos < 0) {
drive->track_pos = 0;
}
drive->sector_pos = 0;
}
/*
@ -466,6 +478,10 @@ apple2_dd_switch_phase(apple2dd *drive, size_t addr)
case 0x7: phase = 4; break;
}
if (phase == -1) {
log_info("Phase addr %02x, operation skipped", addr & 0xf);
}
apple2_dd_phaser(drive, phase);
}
@ -579,7 +595,7 @@ SEGMENT_READER(apple2_dd_switch_read)
// In the first if block, we will handle 0x0..0x8; in the second if,
// we'll do 0x9..0xB, 0xE, and 0xF.
if (nib < 0x9) {
if (nib < 0x8) {
apple2_dd_switch_phase(drive, nib);
} else if (nib < 0xC || nib > 0xD) {
apple2_dd_switch_drive(mach, nib);
@ -617,7 +633,7 @@ SEGMENT_WRITER(apple2_dd_switch_write)
drive = mach->drive1;
}
if (nib < 0x9) {
if (nib < 0x8) {
apple2_dd_switch_phase(drive, nib);
} else if (nib < 0xC || nib > 0xD) {
apple2_dd_switch_drive(mach, nib);