Macintosh-HW
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MacIIROMDiskDriver
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Factored out traps

This commit is contained in:
Zane Kaminski 2020-06-24 13:10:44 -04:00
parent 48b3fd3c90
commit 16e179075f
2 changed files with 19 additions and 14 deletions
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20
rdisk.c
View File

@ -7,20 +7,12 @@
#include <OSUtils.h>
#define RDiskSize (0x00780000L)
#include "rdtraps.h"
#define RDiskBuf ((char*)0x40880000)
#define BufPtr ((Ptr*)0x10C)
#define MemTop ((Ptr*)0x108)
#define MMU32bit ((char*)0x0CB2)
#pragma parameter __D0 ReadXPRam(__D0, __D1, __A0)
OSErr ReadXPRam(short numBytes, short whichByte, void *dest) = {0x4840, 0x3001, 0xA051};
#pragma parameter __D0 RDiskAddDrive(__D1, __D0, __A0)
OSErr RDiskAddDrive(short drvrRefNum, short drvNum, DrvQElPtr dq) = {0x4840, 0x3001, 0xA04E};
inline char IsRPressed() { return *((char*)0x175) & 0x80; }
inline char ISAPressed() { return *((char*)0x174) & 0x01; }
#define Copy24Size (64)
typedef void (*ROMDiskCopy_t)(char *, char *, unsigned long);
void Copy24(char *source, char *dest, unsigned long count) {
@ -87,7 +79,7 @@ OSErr RDiskOpen(IOParamPtr p, DCtlPtr d) {
dNeedLockMask; */
// Add drive to drive queue and return
RDiskAddDrive(c->drvsts.dQRefNum, drvnum, (DrvQElPtr)&c->drvsts.qLink);
RDAddDrive(status->dQRefNum, drvNum, (DrvQElPtr)&status->qLink);
return noErr;
}
@ -99,11 +91,11 @@ static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
else { c->init_done = 1; }
// Read PRAM
ReadXPRam(1, 4, &startup);
ReadXPRam(1, 5, &ram);
RDReadXPRAM(1, 4, &startup);
RDReadXPRAM(1, 5, &ram);
// Either enable ROM disk or remove ourselves from the drive queue
if (startup || IsRPressed()) { // If ROM disk boot set in PRAM or R pressed,
if (startup || RDIsRPressed()) { // If ROM disk boot set in PRAM or R pressed,
// Set ROM disk attributes
c->drvsts.writeProt = -1; // Set write protected
// Clear RAM disk structure fields (even though we used NewHandleSysClear)
@ -111,7 +103,7 @@ static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
c->ramdisk_alloc = NULL;
c-> ramdisk_valid = 0;
// If RAM disk set in PRAM or A pressed, enable RAM disk
if (ram || ISAPressed()) {
if (ram || RDISAPressed()) {
unsigned long minBufPtr, newBufPtr;
// Clearing write protect marks RAM disk enabled
c->drvsts.writeProt = 0;

13
rdtraps.h Normal file
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@ -0,0 +1,13 @@
#ifndef RDTRAPS_H
#define RDTRAPS_H
#pragma parameter __D0 RDReadXPRAM(__D0, __D1, __A0)
OSErr RDReadXPRAM(short numBytes, short whichByte, void *dest) = {0x4840, 0x3001, 0xA051};
#pragma parameter __D0 RDAddDrive(__D1, __D0, __A0)
OSErr RDAddDrive(short drvrRefNum, short drvNum, DrvQElPtr dq) = {0x4840, 0x3001, 0xA04E};
inline char RDIsRPressed() { return *((char*)0x175) & 0x80; }
inline char RDISAPressed() { return *((char*)0x174) & 0x01; }
#endif