Macintosh-HW
/
MacIIROMDiskDriver
mirror of https://github.com/garrettsworkshop/MacIIROMDiskDriver.git
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This commit is contained in:
Zane Kaminski 2021-04-01 20:49:27 -04:00
parent 77a46f81df
commit ab16e98a10
4 changed files with 11 additions and 7 deletions
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16
rdisk.c
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@ -57,17 +57,23 @@ void C24(Ptr sourcePtr, Ptr destPtr, unsigned long byteCount) {
}
// Switch to 32-bit mode and patch
void P24(Ptr ramdisk, char dbgEN, char cdromEN) {
void P24(Ptr dbg, Ptr cdrom, char dbgByte, char cdromByte) {
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) { *dbg = *RDiskDBGDisByte; }
if (!cdromEN) { *cdrom = *RDiskCDROMDisByte; }
if (dbg) { *dbg = dbgByte; }
if (cdrom) { *cdrom = cdromByte; }
SwapMMUMode(&mode);
}
typedef void (*RDiskPatch_t)(Ptr, Ptr, char, char);
static void patch24(Ptr buf, char dbgEN, char cdromEN) {
RDiskPatch_t fun = (RDiskPatch_t)P24;
fun(/*dbgEN ?*/ buf + *RDiskDBGDisPos /*: (Ptr)0*/,
/*cdromEN ?*/ buf + *RDiskCDROMDisPos /*: (Ptr)0*/,
*RDiskDBGDisByte, *RDiskCDROMDisPos);
}
// Figure out the first available drive number >= 5
static int RDFindDrvNum() {
DrvQElPtr dq;

2
rdisk.h
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@ -34,8 +34,6 @@ typedef struct RDiskStorage_s {
typedef void (*RDiskCopy_t)(Ptr, Ptr, unsigned long);
#define copy24(s, d, b) { RDiskCopy_t copy24 = (RDiskCopy_t)C24; copy24(s, d, b); }
typedef void (*RDiskPatch_t)(Ptr, char, char);
#define patch24(s, d, b) { RDiskPatch_t patch24 = (RDiskPatch_t)P24; patch24(s, d, b); }
#define PackBits_Repeat(count) (-1 * (count - 1))
#define PackBits_Literal(count) (count - 1)