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Fixed second drive motor keeps running when first drive is only accessed.

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This commit is contained in:
Toni Riikonen
2025-09-20 13:40:17 +03:00
parent 108872390a
commit 307b173ae7
1 changed files with 10 additions and 5 deletions
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15
src/floppy/fdc.c
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@@ -854,11 +854,16 @@ fdc_write(uint16_t addr, uint8_t val, void *priv)
fdc_soft_reset(fdc);
/* We can now simplify this since each motor now spins separately. */
for (int i = 0; i < FDD_NUM; i++) {
drive_num = real_drive(fdc, i);
if ((!fdd_get_flags(drive_num)) || (drive_num >= FDD_NUM))
val &= ~(0x10 << drive_num);
else
fdd_set_motor_enable(i, (val & (0x10 << drive_num)));
int phys = real_drive(fdc, i);
if (phys >= FDD_NUM || !fdd_get_flags(phys)) {
/* Clear the logical motor bit for a non‑present drive */
val &= ~(0x10 << i);
fdd_set_motor_enable(phys, 0);
continue;
}
/* Motor bit positions are tied to logical index i (bits 4..7) */
int on = (val & (0x10 << i)) ? 1 : 0;
fdd_set_motor_enable(phys, on);
}
drive_num = real_drive(fdc, val & 0x03);
current_drive = drive_num;