Macintosh-HW/MacIIROMDiskDriver
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This commit is contained in:
Zane Kaminski 2021-04-01 20:15:18 -04:00
parent a2f6c2fa2c
commit 6a3bc43f05
4 changed files with 10 additions and 8 deletions
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bin/driver7M5.bin
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bin/rom8M.bin
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4
entry.s
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@ -22,9 +22,9 @@ RDiskDBGDisPos:
dc.l 0x00000031
RDiskCDROMDisPos:
dc.l 0x00012CAF
RDiskDBGNamePos:
RDiskDBGNameAddr:
dc.l 0x4088002A
RDiskCDROMNamePos:
RDiskCDROMNameAddr:
dc.l 0x40892C96
RDiskDBGDisByte:
dc.b 0x44

14
rdisk.c
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@ -58,12 +58,13 @@ void C24(Ptr sourcePtr, Ptr destPtr, unsigned long byteCount) {
// Switch to 32-bit mode and patch
void P24(Ptr ramdisk, char dbgEN, char cdromEN) {
if (!ramdisk) { return; }
signed char mode = true32b;
SwapMMUMode(&mode);
register Ptr dbg __asm__("%a1") = &ramdisk[*RDiskDBGDisPos];
register Ptr cdrom __asm__("%a2") = &ramdisk[*RDiskCDROMDisPos];
// Patch debug and CD-ROM disable bytes
//if (!dbgEN) { ramdisk[*RDiskDBGDisPos] = *RDiskDBGDisByte; }
//if (!cdromEN) { ramdisk[*RDiskCDROMDisPos] = *RDiskCDROMDisByte; }
if (!dbgEN) { *dbg = *RDiskDBGDisByte; }
if (!cdromEN) { *cdrom = *RDiskCDROMDisByte; }
SwapMMUMode(&mode);
}
@ -153,6 +154,8 @@ static void RDInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
BlockMove(RDiskBuf, c->ramdisk, RDiskSize);
// Clearing write protect marks RAM disk enabled
c->status.writeProt = 0;
// Patch debug and CD-ROM enable bytes
patch24(c->ramdisk, dbgEN, cdromEN);
}
} else { // 24-bit mode
// Put RAM disk just past 8MB
@ -165,12 +168,11 @@ static void RDInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
copy24(RDiskBuf, c->ramdisk, RDiskSize);
// Clearing write protect marks RAM disk enabled
c->status.writeProt = 0;
// Patch debug and CD-ROM enable bytes
patch24(c->ramdisk, dbgEN, cdromEN);
}
}
// Patch debug and CD-ROM enable bytes
patch24(c->ramdisk, dbgEN, cdromEN);
// Unmount if not booting from ROM disk
if (unmountEN) { c->status.diskInPlace = 0; }