2021-09-07 02:28:07 +00:00
|
|
|
* MAINMEM.INIT.S
|
|
|
|
|
* (c) Bobbi 2021 GPLv3
|
|
|
|
|
*
|
|
|
|
|
* Initialization, interrupt handling and reset handling code
|
|
|
|
|
* that resides in main memory.
|
|
|
|
|
|
2021-11-14 22:28:48 +00:00
|
|
|
* 14-Nov-2021 If started from CSD, gets prefix to CMDBUF.
|
|
|
|
|
|
|
|
|
|
|
2021-09-07 02:28:07 +00:00
|
|
|
* Trampoline in main memory used by aux memory IRQ handler
|
|
|
|
|
* to invoke Apple II / ProDOS IRQs in main memory
|
2021-11-14 23:04:10 +00:00
|
|
|
A2IRQ >>> IENTMAIN ; IENTMAIN does not do CLI
|
|
|
|
|
JSR A2IRQ2
|
|
|
|
|
>>> XF2AUX,IRQBRKRET
|
|
|
|
|
A2IRQ2 PHP ; Fake things to look like IRQ
|
|
|
|
|
JMP (A2IRQV) ; Call Apple II ProDOS ISR
|
2021-09-07 02:28:07 +00:00
|
|
|
|
|
|
|
|
* BRK handler in main memory. Used on Apple IIgs only.
|
2021-11-14 23:04:10 +00:00
|
|
|
GSBRK >>> XF2AUX,GSBRKAUX
|
2021-09-07 02:28:07 +00:00
|
|
|
|
2022-10-10 06:38:13 +00:00
|
|
|
** Set prefix if not already set
|
|
|
|
|
*SETPRFX LDA #GPFXCMD
|
|
|
|
|
* STA :OPC7 ; Initialize cmd byte to $C7
|
|
|
|
|
*:L1 JSR MLI
|
|
|
|
|
*:OPC7 DB $00
|
|
|
|
|
* DW GSPFXPL
|
|
|
|
|
* LDX DRVBUF1 ; was $0300
|
|
|
|
|
* BNE RTSINST
|
|
|
|
|
* LDA DEVNUM
|
|
|
|
|
* STA ONLNPL+1 ; Device number
|
|
|
|
|
* JSR MLI
|
|
|
|
|
* DB ONLNCMD
|
|
|
|
|
* DW ONLNPL
|
|
|
|
|
* LDA DRVBUF2 ; was $0301
|
|
|
|
|
* AND #$0F
|
|
|
|
|
* TAX
|
|
|
|
|
* INX
|
|
|
|
|
* STX DRVBUF1 ; was $0300
|
|
|
|
|
* LDA #'/'
|
|
|
|
|
* STA DRVBUF2 ; was $0301
|
|
|
|
|
* DEC :OPC7
|
|
|
|
|
* BNE :L1
|
|
|
|
|
*RTSINST LDA CMDPATH
|
|
|
|
|
* BEQ :GETPFX ; CMDPATH empty
|
|
|
|
|
* LDA CMDPATH+1
|
|
|
|
|
* CMP #'/'
|
|
|
|
|
* BEQ :GETPFXDONE ; CMDPATH already absolute path
|
|
|
|
|
*:GETPFX JSR MLI
|
|
|
|
|
* DB $C7 ; Get Prefix
|
|
|
|
|
* DW :GETADDR
|
|
|
|
|
*:GETPFXDONE RTS
|
|
|
|
|
*:GETADDR HEX 01 ; One parameter
|
|
|
|
|
* DW CMDPATH ; Get prefix to CMDPATH
|
|
|
|
|
*
|
|
|
|
|
*
|
|
|
|
|
** Disconnect /RAM ramdrive to avoid aux corruption
|
|
|
|
|
** Stolen from Beagle Bros Extra K
|
|
|
|
|
*DISCONN LDA MACHID
|
|
|
|
|
* AND #$30
|
|
|
|
|
* CMP #$30
|
|
|
|
|
* BNE :S1
|
|
|
|
|
* LDA DEVADR32
|
|
|
|
|
* CMP DEVADR01
|
|
|
|
|
* BNE :S2
|
|
|
|
|
* LDA DEVADR32+1
|
|
|
|
|
* CMP DEVADR01+1
|
|
|
|
|
* BEQ :S1
|
|
|
|
|
*:S2 LDY DEVCNT
|
|
|
|
|
*:L1 LDA DEVLST,Y
|
|
|
|
|
* AND #$F3
|
|
|
|
|
* CMP #$B3
|
|
|
|
|
* BEQ :S3
|
|
|
|
|
* DEY
|
|
|
|
|
* BPL :L1
|
|
|
|
|
* BMI :S1
|
|
|
|
|
*:S3 LDA DEVLST,Y
|
|
|
|
|
* STA DRVBUF2+1 ; was $0302
|
|
|
|
|
*:L2 LDA DEVLST+1,Y
|
|
|
|
|
* STA DEVLST,Y
|
|
|
|
|
* BEQ :S4
|
|
|
|
|
* INY
|
|
|
|
|
* BNE :L2
|
|
|
|
|
*:S4 LDA DEVADR32
|
|
|
|
|
* STA DRVBUF1 ; was $0300
|
|
|
|
|
* LDA DEVADR32+1
|
|
|
|
|
* STA DRVBUF2 ; was $0301
|
|
|
|
|
* LDA DEVADR01
|
|
|
|
|
* STA DEVADR32
|
|
|
|
|
* LDA DEVADR01+1
|
|
|
|
|
* STA DEVADR32+1
|
|
|
|
|
* DEC DEVCNT
|
|
|
|
|
*:S1 RTS
|
|
|
|
|
*
|
2021-09-07 02:28:07 +00:00
|
|
|
* Reset handler - invoked on Ctrl-Reset
|
2022-10-12 04:00:36 +00:00
|
|
|
* XFER to AUXMOS ($D000) in aux, AuxZP on, LC on
|
2021-11-14 23:04:10 +00:00
|
|
|
RESET TSX
|
|
|
|
|
STX $0100
|
2022-10-12 04:00:36 +00:00
|
|
|
LDA AN0OFF ; AN0 off
|
|
|
|
|
LDA AN1OFF ; AN1 off
|
|
|
|
|
LDA AN2ON ; AN2 on
|
|
|
|
|
LDA AN3ON ; AN3 on
|
2021-11-14 23:04:10 +00:00
|
|
|
>>> XF2AUX,AUXMOS
|
|
|
|
|
RTS
|
|
|
|
|
|
|
|
|
|
|
2021-09-07 02:28:07 +00:00
|
|
|
|
