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DiskII: Prevent stepper motor changing phase when motor is off (fixes #525)

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tomcw 2018-01-27 17:02:33 +00:00
parent 597843bc3a
commit b50da5a95b
1 changed files with 9 additions and 0 deletions
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9
source/Disk.cpp
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@ -365,6 +365,7 @@ static void __stdcall DiskControlMotor(WORD, WORD address, BYTE, BYTE, ULONG uEx
g_formatTrack.DriveNotWritingTrack();
floppymotoron = newState;
// TODO: should turning the motor off reset the state: floppyloadmode, floppywritemode, phases? Like DiskReset()
#if LOG_DISK_MOTOR
LOG_DISK("motor %s\r\n", (floppymotoron) ? "on" : "off");
#endif
@ -375,6 +376,14 @@ static void __stdcall DiskControlMotor(WORD, WORD address, BYTE, BYTE, ULONG uEx
static void __stdcall DiskControlStepper(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles)
{
if (!floppymotoron) // GH#525
{
#if LOG_DISK_PHASES
LOG_DISK("stepper accessed whilst motor is off\r\n");
#endif
return;
}
Disk_t * fptr = &g_aFloppyDisk[currdrive];
int phase = (address >> 1) & 3;
int phase_bit = (1 << phase);