MacIIROMDiskDriver/entry.s

.EQU	killCode,	 1
.EQU	noQueueBit,	 9
.EQU	kioTrap,	 6
.EQU	kioResult,	16
.EQU	kcsCode,	26
.EQU	JIODone,	0x08FC
.GLOBAL RDiskSig
.GLOBAL RDiskDBGNamePos
.GLOBAL RDiskDBGDisPos
.GLOBAL RDiskDBGDisByte
.GLOBAL RDiskCDRNamePos
.GLOBAL RDiskCDRDisPos
.GLOBAL RDiskCDRDisByte

dc.l	0x00000000, 0x00000000, 0x00000000, 0x00000000
dc.l	0x00000000, 0x00000000, 0x00000000, 0x00000000

RDiskSig:
.ascii	"\5RDisk\0"
.align 4
RDiskDBGDisPos:
dc.l 0x00000031
RDiskCDRDisPos:
dc.l 0x00012CAF
RDiskDBGNameAddr:
dc.l 0x4088002A
RDiskCDRNameAddr:
dc.l 0x40892C96
RDiskDBGDisByte:
dc.b 0x44
RDiskCDRDisByte:
dc.b 0x44
RDiskRAMRequired:
.ascii	"16"

.align 4
DOpen:
	movem.l		%A0-%A1, -(%SP)
	bsr			RDOpen
	movem.l		(%SP)+, %A0-%A1
	rts

DClose:
	movem.l		%A0-%A1, -(%SP)
	bsr			RDClose
	movem.l		(%SP)+, %A0-%A1
	rts

DPrime:
	movem.l		%A0-%A1, -(%SP)
	bsr			RDPrime
	movem.l		(%SP)+, %A0-%A1
	bra.b		IOReturn

DControl:
	movem.l		%A0-%A1, -(%SP)
	bsr			RDCtl
	movem.l		(%SP)+, %A0-%A1
	cmpi.w		#killCode, kcsCode(%A0)
	bne.b		IOReturn
	rts

DStatus:
	movem.l		%A0-%A1, -(%SP)
	bsr			RDStat
	movem.l		(%SP)+, %A0-%A1

IOReturn:
	move.w		kioTrap(%A0), %D1
	btst		#noQueueBit, %D1
	beq.b		Queued

NotQueued:
	tst.w		%D0
	ble.b		ImmedRTS
	clr.w		%D0

ImmedRTS:
	move.w		%D0, kioResult(%A0)
	rts

Queued:
	move.l		JIODone, -(%SP)
	rts
Works but read-only 2020-06-26 07:12:08 +00:00			`.EQU killCode, 1`
			`.EQU noQueueBit, 9`
			`.EQU kioTrap, 6`
			`.EQU kioResult, 16`
			`.EQU kcsCode, 26`
			`.EQU JIODone, 0x08FC`
Add more signature stuff to entry.s 2021-03-04 17:43:34 +00:00			`.GLOBAL RDiskSig`
			`.GLOBAL RDiskDBGNamePos`
			`.GLOBAL RDiskDBGDisPos`
			`.GLOBAL RDiskDBGDisByte`
Make CD and debug patches explicit 2021-04-02 02:05:21 +00:00			`.GLOBAL RDiskCDRNamePos`
			`.GLOBAL RDiskCDRDisPos`
			`.GLOBAL RDiskCDRDisByte`
Works but read-only 2020-06-26 07:12:08 +00:00
With boot patch 2020-06-30 01:08:50 +00:00			`dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000`
			`dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000`
Add more signature stuff to entry.s 2021-03-04 17:43:34 +00:00
			`RDiskSig:`
Release candidate 1 2020-07-02 07:06:35 +00:00			`.ascii "\5RDisk\0"`
With boot patch 2020-06-30 01:08:50 +00:00			`.align 4`
Add more signature stuff to entry.s 2021-03-04 17:43:34 +00:00			`RDiskDBGDisPos:`
New 7.5 MB disk image with new control panel 2021-03-31 10:33:00 +00:00			`dc.l 0x00000031`
Make CD and debug patches explicit 2021-04-02 02:05:21 +00:00			`RDiskCDRDisPos:`
New 7.5 MB disk image with new control panel 2021-03-31 10:33:00 +00:00			`dc.l 0x00012CAF`
Try avoiding indexed instructions... 2021-04-02 00:15:18 +00:00			`RDiskDBGNameAddr:`
Add more signature stuff to entry.s 2021-03-04 17:43:34 +00:00			`dc.l 0x4088002A`
Make CD and debug patches explicit 2021-04-02 02:05:21 +00:00			`RDiskCDRNameAddr:`
Add more signature stuff to entry.s 2021-03-04 17:43:34 +00:00			`dc.l 0x40892C96`
			`RDiskDBGDisByte:`
			`dc.b 0x44`
Make CD and debug patches explicit 2021-04-02 02:05:21 +00:00			`RDiskCDRDisByte:`
Change CD-ROM disable byte back to 0x44 ('D') 2021-04-03 10:30:03 +00:00			`dc.b 0x44`
Add RDiskRAMReq string to entry.s 2021-03-05 15:07:48 +00:00			`RDiskRAMRequired:`
			`.ascii "16"`
With boot patch 2020-06-30 01:08:50 +00:00
Add more signature stuff to entry.s 2021-03-04 17:43:34 +00:00			`.align 4`
Works but read-only 2020-06-26 07:12:08 +00:00			`DOpen:`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l %A0-%A1, -(%SP)`
Change "RDisk" prefix of method names to "RD" Change saves space in driver.o because ASCII method name string is appended to end of each method 2021-03-04 17:43:08 +00:00			`bsr RDOpen`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l (%SP)+, %A0-%A1`
Works but read-only 2020-06-26 07:12:08 +00:00			`rts`

			`DClose:`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l %A0-%A1, -(%SP)`
Change "RDisk" prefix of method names to "RD" Change saves space in driver.o because ASCII method name string is appended to end of each method 2021-03-04 17:43:08 +00:00			`bsr RDClose`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l (%SP)+, %A0-%A1`
Works but read-only 2020-06-26 07:12:08 +00:00			`rts`

			`DPrime:`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l %A0-%A1, -(%SP)`
Change "RDisk" prefix of method names to "RD" Change saves space in driver.o because ASCII method name string is appended to end of each method 2021-03-04 17:43:08 +00:00			`bsr RDPrime`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l (%SP)+, %A0-%A1`
Works but read-only 2020-06-26 07:12:08 +00:00			`bra.b IOReturn`

			`DControl:`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l %A0-%A1, -(%SP)`
Change "RDisk" prefix of method names to "RD" Change saves space in driver.o because ASCII method name string is appended to end of each method 2021-03-04 17:43:08 +00:00			`bsr RDCtl`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l (%SP)+, %A0-%A1`
Works but read-only 2020-06-26 07:12:08 +00:00			`cmpi.w #killCode, kcsCode(%A0)`
			`bne.b IOReturn`
			`rts`

			`DStatus:`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l %A0-%A1, -(%SP)`
Change "RDisk" prefix of method names to "RD" Change saves space in driver.o because ASCII method name string is appended to end of each method 2021-03-04 17:43:08 +00:00			`bsr RDStat`
With boot patch 2020-06-30 01:08:50 +00:00			`movem.l (%SP)+, %A0-%A1`
Works but read-only 2020-06-26 07:12:08 +00:00
			`IOReturn:`
With boot patch 2020-06-30 01:08:50 +00:00			`move.w kioTrap(%A0), %D1`
			`btst #noQueueBit, %D1`
Works but read-only 2020-06-26 07:12:08 +00:00			`beq.b Queued`

			`NotQueued:`
			`tst.w %D0`
			`ble.b ImmedRTS`
			`clr.w %D0`

			`ImmedRTS:`
With boot patch 2020-06-30 01:08:50 +00:00			`move.w %D0, kioResult(%A0)`
Works but read-only 2020-06-26 07:12:08 +00:00			`rts`

			`Queued:`
With boot patch 2020-06-30 01:08:50 +00:00			`move.l JIODone, -(%SP)`
Works but read-only 2020-06-26 07:12:08 +00:00			`rts`