Macintosh-HW/MacIIROMDiskDriver
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Add ROM disk disable

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This commit is contained in:
Zane Kaminski 2021-04-02 03:51:40 -04:00
parent 809c78f9dc
commit dfd35cef2d
4 changed files with 27 additions and 19 deletions
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bin/driver7M5.bin
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36
rdisk.c
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@ -54,10 +54,10 @@ void C24(Ptr sourcePtr, Ptr destPtr, unsigned long byteCount) {
// Switch to 32-bit mode and patch
#pragma parameter P24(__A2, __D3)
void __attribute__ ((noinline)) P24(Ptr ptr, char patch) {
void __attribute__ ((noinline)) P24(Ptr pos, char patch) {
signed char mode = true32b;
SwapMMUMode(&mode);
*ptr = patch; // Patch byte
*pos = patch; // Patch byte
SwapMMUMode(&mode);
}
@ -127,10 +127,12 @@ static void RDInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
c->initialized = 1;
// Decode settings
RDDecodeSettings(&unmountEN, &mountEN, &ramEN, &dbgEN, &cdrEN);
// Set debug and CD-ROM enable flags in storage struct
c->dbgEN = dbgEN;
c->cdrEN = cdrEN;
// Set debug and CD-ROM disable stuff in storage struct
c->dbgDisPos = dbgEN ? *((long*)0x40851D98) : -1;
c->cdrDisPos = cdrEN ? *((long*)0x40851D9C) : -1;
c->dbgDisByte = *((char*)0x40851DA8);
c->cdrDisByte = *((char*)0x40851DA9);
// If RAM disk enabled, try to allocate RAM disk buffer if not already
if (ramEN & !c->ramdisk) {
if (*MMU32bit) { // 32-bit mode
@ -162,14 +164,12 @@ static void RDInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
}
}
// Patch debug and CD-ROM enable bytes
// Apply patches to RAM disk
if (c->ramdisk) {
Ptr pos = c->ramdisk + *((long*)0x40851D98);
char patch = *((char*)0x40851DA8);
if (!dbgEN /*&& *RDiskDBGDisPos >= 0*/) { patch24(pos, patch); }
pos = c->ramdisk + *((long*)0x40851D9C);
patch = *((char*)0x40851DA9);
if (!cdrEN /*&& *RDiskCDRDisPos >= 0*/) { patch24(pos, patch); }
// Patch debugger enable byte
if (c->dbgDisPos >=0) { patch24(c->ramdisk + c->dbgDisPos, c->dbgDisByte); }
// Patch CD-R enable byte
if (c->cdrDisPos >=0) { patch24(c->ramdisk + c->dbgDisPos, c->dbgDisByte); }
}
// Unmount if not booting from ROM disk
@ -211,6 +211,16 @@ OSErr RDPrime(IOParamPtr p, DCtlPtr d) {
// Read from disk into buffer.
if (*MMU32bit) { BlockMove(disk, p->ioBuffer, p->ioReqCount); }
else { copy24(disk, StripAddress(p->ioBuffer), p->ioReqCount); }
if (c->dbgDisPos >= 0 &&
c->dbgDisPos >= d->dCtlPosition &&
c->dbgDisPos < d->dCtlPosition + p->ioReqCount) {
p->ioBuffer[c->dbgDisPos - d->dCtlPosition] = c->dbgDisByte;
}
if (c->dbgDisPos >= 0 &&
c->cdrDisPos >= d->dCtlPosition &&
c->cdrDisPos < d->dCtlPosition + p->ioReqCount) {
p->ioBuffer[c->cdrDisPos - d->dCtlPosition] = c->cdrDisByte;
}
} else if (cmd == aWrCmd) { // Write
// Fail if write protected or RAM disk buffer not set up
if (c->status.writeProt || !c->ramdisk) { return wPrErr; }

10
rdisk.h
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@ -2,10 +2,6 @@
#define RDISK_H
#define RDiskBuf ((char*)0x40880000)
extern uint32_t *RDiskDBGDisPos;
extern char *RDiskDBGDisByte;
extern uint32_t *RDiskCDRDisPos;
extern char *RDiskCDRDisByte;
#define BufPtr ((Ptr*)0x10C)
#define MemTop ((Ptr*)0x108)
#define MMU32bit ((char*)0xCB2)
@ -27,8 +23,10 @@ typedef struct RDiskStorage_s {
DrvSts2 status;
char initialized;
Ptr ramdisk;
char dbgEN;
char cdrEN;
long dbgDisPos;
long cdrDisPos;
char dbgDisByte;
char cdrDisByte;
#ifdef RDISK_COMPRESS_ICON_ENABLE
char icon[RDISK_ICON_SIZE];
#endif