Macintosh-HW/MacIIROMDiskDriver
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With boot patch

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This commit is contained in:
Zane Kaminski 2020-06-29 21:08:50 -04:00
parent eb34dbb0a3
commit 8600f9ef0e
6 changed files with 70 additions and 38 deletions
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9
Makefile
View File

@ -45,8 +45,13 @@ bin/driver.bin: bin obj/driver.o
$(OBJCOPY) -O binary obj/driver.o $@
bin/rom.bin: baserom.bin RDisk1M5.dsk bin bin/driver.bin obj/entry_rel.sym
cp baserom.bin $@ # copy base rom
bin/rom.bin: baserom.bin RDisk1M5.dsk bin bin/driver.bin obj/driver_abs.sym obj/entry_rel.sym
cp baserom.bin $@ # Copy base rom
# Patch boot
printf '\x4E' | dd of=$@ bs=1 seek=5888 count=1 conv=notrunc # Copy JSR opcode into IsFloppy boot routine
printf '\xF9' | dd of=$@ bs=1 seek=5889 count=1 conv=notrunc # Copy JSR opcode second byte
cat obj/driver_abs.sym | grep "BootCheckEntry" | cut -c1-8 | xxd -r -p - | dd of=$@ bs=1 seek=5890 count=4 conv=notrunc
# Patch driver
dd if=bin/driver.bin of=$@ bs=1 seek=335248 skip=32 conv=notrunc # Copy driver code
printf '\x78' | dd of=$@ bs=1 seek=335168 count=1 conv=notrunc # Set resource flags
printf '\x4F' | dd of=$@ bs=1 seek=335216 count=1 conv=notrunc # Set driver flags

BIN
bin/driver.bin
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Binary file not shown.

BIN
bin/rom.bin
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Binary file not shown.

58
entry.s
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@ -1,51 +1,65 @@
.EQU killCode, 1
.EQU noQueueBit, 9
.EQU kioTrap, 6
.EQU kioResult, 16
.EQU kcsCode, 26
.EQU JIODone, 0x08FC
dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000
dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000
.ascii "\9GWROMDisk\0"
.align 4
.EQU killCode, 1
.EQU noQueueBit, 9
.EQU kioTrap, 6
.EQU kioResult, 16
.EQU kcsCode, 26
.EQU JIODone, 0x08FC
BootCheckEntry:
* Boot if reference number == -5
cmp #-5, 8(%A2)
beq.b BootCheckRet
* Otherwise don't boot if reference number != -50
cmp #-50, 8(%A2)
bne.b BootCheckRet
* Call to check PRAM
movem.l %A0-%A7/%D0-%D7, -(%SP)
jsr RDiskBootCheckPRAM
cmp #0, %D0
movem.l (%SP)+, %A0-%A7/%D0-%D7
BootCheckRet:
rts
jmp BootCheckEntry
DOpen:
movem.l %A0-%A1,-(%SP)
movem.l %A0-%A1, -(%SP)
bsr RDiskOpen
movem.l (%SP)+,%A0-%A1
movem.l (%SP)+, %A0-%A1
rts
DClose:
movem.l %A0-%A1,-(%SP)
movem.l %A0-%A1, -(%SP)
bsr RDiskClose
movem.l (%SP)+,%A0-%A1
movem.l (%SP)+, %A0-%A1
rts
DPrime:
movem.l %A0-%A1,-(%SP)
movem.l %A0-%A1, -(%SP)
bsr RDiskPrime
movem.l (%SP)+,%A0-%A1
movem.l (%SP)+, %A0-%A1
bra.b IOReturn
DControl:
movem.l %A0-%A1,-(%SP)
movem.l %A0-%A1, -(%SP)
bsr RDiskControl
movem.l (%SP)+,%A0-%A1
movem.l (%SP)+, %A0-%A1
cmpi.w #killCode, kcsCode(%A0)
bne.b IOReturn
rts
DStatus:
movem.l %A0-%A1,-(%SP)
movem.l %A0-%A1, -(%SP)
bsr RDiskStatus
movem.l (%SP)+,%A0-%A1
movem.l (%SP)+, %A0-%A1
IOReturn:
move.w kioTrap(%A0),%D1
btst #noQueueBit,%D1
move.w kioTrap(%A0), %D1
btst #noQueueBit, %D1
beq.b Queued
NotQueued:
@ -54,7 +68,7 @@ NotQueued:
clr.w %D0
ImmedRTS:
move.w %D0,kioResult(%A0)
move.w %D0, kioResult(%A0)
rts
Queued:
@ -64,5 +78,5 @@ Queued:
rts
MyIODone:
move.l JIODone,-(%SP)
move.l JIODone, -(%SP)
rts

36
rdisk.c
View File

@ -78,6 +78,13 @@ const long RDiskIcon[65] = {
0
};
#pragma parameter __D0 RDiskBootCheckPRAM()
short RDiskBootCheckPRAM() {
char mount;
RDiskReadXPRAM(1, 4, &mount);
return mount == 0x5D;
}
// Switch to 24-bit mode and copy
void RDiskCopy24(Ptr sourcePtr, Ptr destPtr, unsigned long byteCount) {
char mode = true32b;
@ -116,7 +123,9 @@ OSErr RDiskOpen(IOParamPtr p, DCtlPtr d) {
c = *(RDiskStorage_t**)d->dCtlStorage;
// Initialize storage struct fields
c->init_done = 0;
c->initialized = 0;
c->offline = 0;
c->forceMount = 0;
c->ramdisk = NULL;
c->copy24 = (RDiskCopy_t)copy24;
@ -138,22 +147,22 @@ OSErr RDiskOpen(IOParamPtr p, DCtlPtr d) {
return noErr;
}
OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
char startup = 0, ram = 0;
static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
char mount = 0, ram = 0;
// Mark init done
c->init_done = 1;
c->initialized = 1;
// Read PRAM
RDiskReadXPRAM(1, 4, &startup);
RDiskReadXPRAM(1, 4, &mount);
RDiskReadXPRAM(1, 5, &ram);
// Either enable ROM disk or remove ourselves from the drive queue
if (startup || RDiskIsRPressed()) { // If ROM disk boot set in PRAM or R pressed,*/
if (c->forceMount || mount || RDiskIsRPressed()) { // If ROM disk boot set in PRAM or R pressed,
// Set ROM disk attributes
c->status.writeProt = -1; // Set write protected
// If RAM disk set in PRAM or A pressed, enable RAM disk
if (ram || RDiskIsAPressed() || c->mount) {
if (ram || RDiskIsAPressed()) { // If RAM disk set in PRAM or A pressed
// Try to allocate RAM disk buffer
if (*MMU32bit) { // 32-bit mode
unsigned long minBufPtr, newBufPtr;
@ -161,7 +170,7 @@ OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
minBufPtr = ((unsigned long)*MemTop / 2) + 1024;
newBufPtr = (unsigned long)*BufPtr - RDiskSize;
if (newBufPtr > minBufPtr && (unsigned long)*BufPtr > newBufPtr) {
// Allocate RAM disk buffer by lowering BufPtrå
// Allocate RAM disk buffer by lowering BufPtra
*BufPtr = (Ptr)newBufPtr;
// Set RAM disk buffer pointer.
c->ramdisk = *BufPtr;
@ -200,9 +209,8 @@ OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
// If we found our driver, remove it from the queue
if (dq->dQRefNum == d->dCtlRefNum) {
Dequeue((QElemPtr)dq, head);
DisposeHandle(d->dCtlStorage);
}
d->dCtlStorage = NULL;
c->offline = 1;
// Return disk offline error
return offLinErr;
}
@ -219,9 +227,11 @@ OSErr RDiskPrime(IOParamPtr p, DCtlPtr d) {
if (!d->dCtlStorage) { return offLinErr; }
// Dereference dCtlStorage to get pointer to our context
c = *(RDiskStorage_t**)d->dCtlStorage;
// Return disk offline error if marked offline
if (c->offline) { return offLinErr; }
// Initialize if this is the first prime call
if (!c->init_done) {
if (!c->initialized) {
OSErr ret = RDiskInit(p, d, c);
if (ret != noErr) { return ret; }
}
@ -291,7 +301,7 @@ OSErr RDiskControl(CntrlParamPtr p, DCtlPtr d) {
case 21: case 22:
*(Ptr*)&p->csParam = (Ptr)&RDiskIcon;
return noErr;
case 128: c->mount = 1; return noErr;
case 128: c->forceMount = 1; return noErr;
default: return controlErr;
}
}
@ -303,6 +313,8 @@ OSErr RDiskStatus(CntrlParamPtr p, DCtlPtr d) {
if (!d->dCtlStorage) { return statusErr; }
// Dereference dCtlStorage to get pointer to our context
c = *(RDiskStorage_t**)d->dCtlStorage;
// Fail if offline
if (c->offline) { return statusErr; }
// Handle status request based on csCode
switch (p->csCode) {
case drvStsCode:

5
rdisk.h
View File

@ -37,10 +37,11 @@ typedef void (*RDiskCopy_t)(Ptr, Ptr, unsigned long);
typedef struct RDiskStorage_s {
DrvSts2 status;
unsigned long init_done;
char initialized;
char offline;
char forceMount;
char *ramdisk;
RDiskCopy_t copy24;
char mount;
} RDiskStorage_t;
#endif