Macintosh-HW/MacIIROMDiskDriver
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This commit is contained in:
Zane Kaminski 2021-04-02 02:50:54 -04:00
parent b4bc1d6f21
commit 3679761214
4 changed files with 7 additions and 8 deletions
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bin/driver7M5.bin
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11
rdisk.c
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@ -53,12 +53,11 @@ void C24(Ptr sourcePtr, Ptr destPtr, unsigned long byteCount) {
}
// Switch to 32-bit mode and patch
#pragma parameter P24(__A0, __A1)
void __attribute__ ((noinline)) P24(Ptr ptr, Ptr patch) {
#pragma parameter P24(__A2, __D3)
void __attribute__ ((noinline)) P24(Ptr ptr, char patch) {
signed char mode = true32b;
SwapMMUMode(&mode);
if (*patch == 0x44) { Debugger(); }
//*ptr = *patch; // Patch byte
*ptr = patch; // Patch byte
SwapMMUMode(&mode);
}
@ -165,8 +164,8 @@ static void RDInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
// Patch debug and CD-ROM enable bytes
if (c->ramdisk) {
if (!dbgEN /*&& *RDiskDBGDisPos >= 0*/) { patch24(c->ramdisk + 0x00000031UL, RDiskDBGDisByte); }
if (!cdrEN /*&& *RDiskCDRDisPos >= 0*/) { patch24(c->ramdisk + 0x00012CAFUL, RDiskCDRDisByte); }
if (!dbgEN /*&& *RDiskDBGDisPos >= 0*/) { patch24(c->ramdisk + 0x00000031UL, 0x44); }
if (!cdrEN /*&& *RDiskCDRDisPos >= 0*/) { patch24(c->ramdisk + 0x00012CAFUL, 0x44); }
}
// Unmount if not booting from ROM disk

4
rdisk.h
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@ -37,8 +37,8 @@ typedef struct RDiskStorage_s {
typedef void (*RDiskCopy_t)(Ptr, Ptr, unsigned long);
#define copy24(s, d, b) { RDiskCopy_t f = C24; f(s, d, b); }
typedef void (*RDiskPatch_t)(Ptr, Ptr);
#define patch24(d, s) { RDiskPatch_t f = P24; f(d, s); }
typedef void (*RDiskPatch_t)(Ptr, char);
#define patch24(a, d) { RDiskPatch_t f = P24; f(a, d); }
#define PackBits_Repeat(count) (-1 * (count - 1))
#define PackBits_Literal(count) (count - 1)