mirror of https://github.com/A2osX/A2osX.git
770 lines
20 KiB
Plaintext
770 lines
20 KiB
Plaintext
NEW
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AUTO 3,1
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*--------------------------------------
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H2000 jmp prostart
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jmp atalkset appletalk setup for network boot
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jmp p16start GQuit setup for gs/os
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LDR.MSG.AppleII .AS -"Apple II"
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LDR.MSG.ProDOS .AS -"ProDOS 8 V2.0.3tc "
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.AS -"06-May-93"
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H202F .AS -" "
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LDR.MSG.Copyright
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.AS -"Copyright Apple Computer, Inc., 1983-93"
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LDR.MSG.Reserved
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.AS -"All Rights Reserved."
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p16start inc setuprts set = 2 for GQuit rts
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atalkset inc setuprts set = 1 for appletalk rts
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prostart lda unitnum
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sta LDR.MLIONLINE.P+1
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jsr LDR.Splash
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* test for at least a 65c02
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sed
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lda #$99 a negative #
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clc
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adc #$01 +1 in decimal = 0 (positive)
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cld
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bmi m48k if 6502 because will not clear N flag
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* machine at least an m65c02
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lda #$01 patch for the gs rom
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trb statereg to force off intcxrom
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ldx #H232B yx=232B location table
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ldy /H232B
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jsr reloc move interpreter loader to $800
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bcs m48k error
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* test for at least 64k
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ldy #$00
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lda #$FF
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sta kversion at least 48k ?
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eor kversion
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sec
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bne m48k if not.
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sta kversion try again to be sure
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lda kversion
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bne m48k still not.
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lda RROMBNK2 read ROM
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jsr whchrom get preliminary system config
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bcs m48k machine too small
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lda idapple
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and #$20
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bne m64k if at least 64k //+.
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m48k jmp H22EB need enhanced IIe
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* we have 64k, now determine model: //e , iic, or Cortland (//gs)
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m64k ldx #H2367 yx=2367 relocation table
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ldy /H2367
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jsr reloc
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lda kversion
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sta xdosver save current version for dir use
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H20CE bcc H20D3
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jmp relocerr
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H20D3 lda RROMBNK2 read ROM
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ldx version ROM id byte
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cpx #$06
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bne H211D then it's a //e
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lda #$E0
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bit zidbyte another ROM id byte
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php
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lda idapple
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and #$37
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plp
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bvc set3 if //c or //x
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bmi set7 if //e
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set3 php
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ora #$08
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plp
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bpl mach2 if //c
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ora #$40
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bpl H20FD always taken.
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mach2 inc cflag //c or later
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bvs H20FD
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set7 ora #$80
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H20FD sta idapple
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lda RROMBNK2 read ROM
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sec
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jsr idroutine returns system info
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bcs H211D branch if // family
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inc cortland it's a Cortland, set loader flag
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stz vmode force setvid to reset cursor
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jsr setvid reset output to screen
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lda setuprts
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bne H211D branch if prodos 8 alone
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* running from gs/os shell so zero out os_boot for appletalk
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sta OS_BOOT indicates O/S initially booted.
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jsr patch101 patch for gs/os - rev note #101
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* put dispatcher in bank 2 of language card
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H211D lda LDR.MLIONLINE.P+1 place boot devnum in globals
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sta LDR.MLIREADBLOCK.P+1
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sta devnum last device used
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jsr devsrch finish setting up globals
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lda LDR.MLIREADBLOCK.P+1
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sta devnum
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jsr lc1in switch in language card bank 1.
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ldx #rlclk64 set up clock
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ldy /rlclk64
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jsr reloc
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H2139 bcs H20CE
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lda #calldisp
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sta jspare+1 P8 system death vector
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lda /calldisp
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sta jspare+2
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lda RRAMWRAMBNK2 read/write RAM bank 2
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lda RRAMWRAMBNK2
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ldx #altdsptbl GQuit dispatcher
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ldy /altdsptbl
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lda setuprts
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cmp #$02 is this a GQuit setup?
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beq H216E taken to use GQuit dispatcher.
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ldx #newquitbl else, use Bird's Better Bye
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ldy /newquitbl if correct machine.
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lda machid machine ID byte
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bit #$00 //c ?
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bne H216E if yes, can use.
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and #$C2
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cmp #$82 //e with 80 col card ?
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beq H216E if yes, can use.
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ldx #dsp64 else, use original quit code
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ldy /dsp64
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inc newquitflag using old quit code so set flag
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H216E jsr reloc
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lda #$EE byte to distinguish LC bank 2
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sta $D000
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jsr lc1in switch in LC bank 1
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bcs H2139
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* test for 128k needed to install ram disk
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lda machid machine ID byte
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and #$30
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eor #$30
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bne noramdsk if < 128k
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ldx #$FF
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php save interrupt status
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pla in acc.
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sei no interrupts.
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sta SETALTZP use alt zero page/stack
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stx auxsp init aux sp to $FF
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sta CLRALTZP use main zero page/stack
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pha restore interrupt status
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plp
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sta CLRC3ROM enable internal slot 3 ROM
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jsr RAMDRV.Install
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* check interrupt vector to determine ROM version
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noramdsk lda RROMWRAMBNK2 read ROM/write RAM bank 2
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ldy irqv interrupt vector
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ldx irqv+1 x = high byte
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jsr lc1in set language card bank 1 to r/w
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cpx #$D0 is it > $D000 (old roms)
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lda #$00
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bcs H21C5 branch if old roms
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sta SETALTZP use alt zero page/stack
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lda #$FF set aux sp = $FF
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sta auxsp
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stx irqv+1 interrupt vector
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sty irqv save irq vector in aux lc
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sta CLRALTZP use main zero page/stack
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stx irqv+1 save irq vector in main lc
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sty irqv
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lda #$01
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H21C5 sta irqflag 1 = new roms
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stz cortflag assume not Cortland system
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lda cortland running on a Cortland ?
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beq H21D5 branch if not.
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inc cortflag yes it's Cortland
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bra docard
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* check for a rom in slot 3. if no rom, use internal $C300 firmware
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H21D5 sta CLRC3ROM enable internal slot 3 ROM
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lda rommap slot ROM bit map
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and #$08 mask all but slot 3
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bne isromin3 taken if rom in slot 3
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bra H2247 else continue booting
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* found a rom in slot 3. is it an external, identifiable 80 col card
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* with interrupt routines? if so, enable it else use internal $C300 firmware.
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isromin3 sta SETC3ROM enable slot 3 rom
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lda $C305 check card id bytes
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cmp #$38
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bne hitswtch not terminal card
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lda $C307
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cmp #$18
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bne hitswtch
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lda $C30B
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cmp #$01
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bne hitswtch
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lda $C30C is it an apple 80 col compatible card?
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and #$F0
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cmp #$80
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bne hitswtch if not.
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lda machid machine ID byte
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and #$C8
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cmp #$C0 is it a //+ ?
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beq docard yes
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lda $C3FA
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cmp #$2C does card have an interrupt handler?
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beq docard yes
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hitswtch sta CLRC3ROM enable internal $C300 firmware
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* verify that the card in aux slot is actually present
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sta SET80STORE enable 80-col store
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sta SETPAGE2 switch in text page 2
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lda #$EE
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sta txtp2
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asl
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asl txtp2
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cmp txtp2
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bne H2230
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lsr
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lsr txtp2
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cmp txtp2
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H2230 sta CLRPAGE2 main memory
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sta CLR80STORE disable 80-col store
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beq docard branch if card is there
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lda machid machine ID byte
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and #$FD clear 80-col bit 2 (no card)
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bne H2244 always
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docard lda machid
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ora #$02 turn bit 2 on (80-col card is present)
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H2244 sta machid
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H2247 lda cortland are we running on a //gs ?
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beq H225D if not.
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lda #$4C enable clock routine by putting a jmp
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sta clockv in front of clock vector
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ldx #cortclock yx = relocation table
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ldy /cortclock for cortland clock driver
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jsr reloc
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lda #$01 set bit 0 = clock present
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tsb machid
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H225D lda setuprts get setup entry point flag
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beq H2267 taken if normal boot.
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lda RROMBNK2 read ROM
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rts return to caller at setup entry point.
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setuprts .DA #$00 0 = normal boot, <>0 = return
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* set prefix to boot device
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H2267 jsr MLI
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.DA #MLIONLINE
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.DA LDR.MLIONLINE.P
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bcs relocerr
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lda pbuf+1 get volume name length.
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and #$0F strip devnum
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beq relocerr
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inc add 1 for leading '/'
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sta pbuf save prefix length.
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lda #'/' place leading '/' in prefix buffer
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sta pbuf+1
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jsr MLI
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.DA #MLISETPREFIX
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.DA LDR.MLISETPREFIX.P
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bcs relocerr
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tax =0
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stx dst
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ldy #$02 read directory into buffer
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lda /DirBlkBuf
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H228E sta dst+1
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sta LDR.MLIREADBLOCK.P+3
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sty LDR.MLIREADBLOCK.P+4
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stx LDR.MLIREADBLOCK.P+5
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jsr MLI
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.DA #MLIREADBLOCK
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.DA LDR.MLIREADBLOCK.P
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bcs relocerr
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ldy #$03 get next block# from link
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lda (dst),y
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tax
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dey
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ora (dst),y if both bytes are the same
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beq H22B7 then no more blocks of directory.
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lda (dst),y
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tay
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lda dst+1
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clc
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adc #$02 add $200 to buffer pointer
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cmp /dbuf+$800 until it points past end of buffer.
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bcc H228E if ok, read next block.
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H22B7 jmp $800 jmp to "load interpreter" code
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* relocation/configuration error
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relocerr sta RROMBNK2 read ROM
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jsr home
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ldy #$1D
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.1 lda LDR.MSG.LdrErr,y
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sta vline12+4,y
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dey
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bpl .1
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bmi *
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LDR.MSG.LdrErr .AS -"Relocation/Configuration Error"
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H22EB ldy #$23
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.1 lda LDR.MSG.EnhErr,y
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sta vline14+2,y
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dey
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bpl .1
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bmi *
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LDR.MSG.EnhErr .AS -"REQUIRES ENHANCED APPLE IIE OR LATER"
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LDR.MLIONLINE.P .DA #2
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.DA #$60
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.DA pbuf+1
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LDR.MLISETPREFIX.P
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.DA #1
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.DA pbuf
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LDR.MLIREADBLOCK.P
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.DA #3
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.DA #0 unit number
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.DA 0 2 byte data buffer
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.DA 0 2 byte block number
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cortland .BS 1 cortland loader flag (1 = Cortland)
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newquitflag .BS 1 1 = old quit code
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H232B .DA #1 move interpreter loader code
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.DA $800 destination address
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.DA licode.end-licode length to move
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.DA LOADINT source address
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.DA #$01 move $3F0 vectors
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.DA p3vect destination
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.DA $0010 16 bytes to move
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.DA H257B source
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.DA #$01
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.DA lookptr destination address
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.DA $0002 length to move
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.DA dst source
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.DA #$01 move 128k test to zero page
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.DA tst128 destination
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.DA LDR.Test128.Len length to move
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.DA LDR.Test128 source
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.HS FF done
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dsp64 .DA #$01 move p8 dispatcher code
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.DA displc2 destination
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.DA $0300 length (must be <= 3 pages)
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.DA SEL0 source
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.HS FF done
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newquitbl .DA #$01 move Bird's Bye code
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.DA displc2 dest
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.DA $0300 length (must be <= 3 pages)
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.DA SEL1 source
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.HS FF done
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altdsptbl .DA #$01 move GQuit launcher
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.DA displc2 destination
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.DA $0300 length (must be <= 3 pages)
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.DA SEL2 source
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.DA #$01 move a copy of GQuit launcher
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.DA dispadr to dispadr for gsos
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.DA $0300 length (must be <= 3 pages)
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.DA SEL2 source
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.HS FF done
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* tables for moving 64k version of mli for execution
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H2367 .DA #$01 relocation table. 1=move src to dst
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.DA $ff9b destination
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.DA $100-$9B length to move
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.DA IRQ source
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.DA #$01
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.DA MLI dst
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.DA $0100 in one page
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.DA GP src
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.HS 00 0=clear buffers $D700-$DDFF
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.DA $D700 start
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.DA $0700 len
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.DA #$01
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.DA $DE00 dst
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.DA $2100 length of mli
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.DA XDOS src
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.DA #$01
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.DA $D000
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.DA $0700 length of disk ii driver
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.DA XRW
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.HS FF done
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* move thunderclock
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rlclk64 .DA #$01 relocation table. 1=move src to dst
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.DA $D742 destination
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.DA TCLK.END-TCLK.START length of thunderclock driver
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.DA TCLK source
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.DA #$04 4=relocate and move program
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.DA TCLK.START
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.DA TCLK.CEND-TCLK.START
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.DA TCLK.START
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.HS 00
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.HS C1C1
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clock64 .DA #$00
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.HS FF done
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* move cortland clock
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cortclock .DA #$01 relocation table. 1=move src to dst
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.DA $D742 destination
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.DA CCLK.END-CCLK.START length of cortland clock driver
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.DA CCLK source
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.HS FF done
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* load and run appletalk configuration file (atinit) if present
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* or continue loading and running .system file
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* loader origin $800
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LOADINT .PH $800
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licode jsr MLI check for file 'atinit'
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.DA #MLIGETFILEINFO
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.DA gfi_list
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bcc gfi_ok branch if 'atinit' file found
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cmp #$46 file not found?
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beq H23DF if so, continue loading interpreter
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bne H23E2
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gfi_ok lda gfi_type
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cmp #$E2 is 'atinit' correct file type?
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bne H23E2 error - wrong file type
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jsr MLI open 'atinit' file
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.DA #$C8
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.DA atopen
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bne H23E2 error
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lda #$9F max size = 39.75k ($2000-$BF00)
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sta rdlen+1
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stz rdlen
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jsr MLI read 'atinit' file to 'sysentry'
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.DA #$CA
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.DA rdparm
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bne H23E2 error - too big
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jsr MLI close 'atinit' file
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.DA #$CC
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.DA clparm
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bne H23E2 error
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lda RROMBNK2 enable ROM
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jsr sysentry execute ATinit
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H23DF jmp goloadint execute .system file
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* fatal error
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H23E2 ldx $23F0 BUG: should be ATINIT.ERR
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H23E5 lda $23F0,x BUG: should be ATINIT.ERR
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sta vline16,x
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dex
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bne H23E5
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beq *
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ATINIT.ERR .DA #$1A length of message
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.AS -"Unable to load ATInit file"
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gfi_list .DA #$0A
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.DA atinitname
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.HS 00
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gfi_type .HS 00000000
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.HS 0000000000000000
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.HS 0000
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atopen .HS 03
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.DA atinitname
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.DA iobuf i/o buffer
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.HS 01 ref# hard coded since no other files
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atinitname .DA #06 length of name
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.AS -"atinit" name of appletalk config file
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goloadint
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lda /dbuf search directory buffer
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sta idxl+1
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lda #$04 start 1 entry past header
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bne H2434 always.
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H2432 lda idxl calc next entry position
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H2434 clc
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adc dbuf+35 inc to next entry address
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sta idxl
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bcs H2451 branch if page cross.
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adc dbuf+35 test for end of block.
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bcc H2453 branch if not page cross
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lda idxl+1
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lsr end of block?
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bcc H2453 no.
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cmp #$09 end of directory?
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bne H244D no.
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jmp nointrp no interpreter, go quit.
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H244D lda #$04 reset index to 1st entry in next block.
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sta idxl
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H2451 inc idxl+1 inc to next page.
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H2453 ldy #$10 check file type.
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lda #$FF must be a prodos sys file
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eor (idxl),y
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bne H2432 if not sys.
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tay see if active
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lda (idxl),y
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||
beq H2432 if deleted file.
|
||
and #$0F strip file 'kind'.
|
||
sta pbuf save length of name.
|
||
cmp #$08 must be at least 'x.system'
|
||
bcc H2432 else, ignore it.
|
||
tay compare last 7 chars for '.system'
|
||
ldx #$06
|
||
H246C lda (idxl),y
|
||
eor iterp,x
|
||
asl
|
||
bne H2432 branch if something else
|
||
dey
|
||
dex
|
||
bpl H246C
|
||
ldy #$00
|
||
H247A iny
|
||
lda (idxl),y
|
||
sta pbuf,y
|
||
ora #$80 msb on so can be displayed if error
|
||
sta iomess+$11,y
|
||
cpy pbuf
|
||
bne H247A
|
||
lda #$A0 space after name
|
||
sta iomess+$12,y
|
||
tya error message length
|
||
adc #$13 (carry set)
|
||
sta ierlen
|
||
jsr MLI open interpreter file
|
||
.DA #$C8
|
||
.DA opparm
|
||
bne badlod
|
||
jsr MLI get eof (length of file)
|
||
.DA #$D1
|
||
.DA efparm
|
||
bne badlod
|
||
lda eof+2
|
||
bne toolong
|
||
lda eof+1
|
||
cmp #$9F max size = 39.75k ($2000-$BF00)
|
||
bcs toolong
|
||
sta rdlen+1
|
||
lda eof
|
||
sta rdlen (read entire file)
|
||
jsr MLI read interpreter file
|
||
.DA #$CA
|
||
.DA rdparm
|
||
beq H24C8 go close if successfully read.
|
||
cmp #$56 memory conflict?
|
||
beq toolong then too large
|
||
bne badlod else, unable to load.
|
||
H24C8 jsr MLI close interpreter file
|
||
.DA #$CC
|
||
.DA clparm
|
||
bne badlod hopefully never taken
|
||
|
||
* if booting on a //c then see if esc is in keyboard buffer
|
||
* and clear it. it may have been pressed to shift speed
|
||
* of accelerator chip
|
||
|
||
lda cflag
|
||
beq H24DF taken if not booting on a //c
|
||
lda kbd else, check for keypress
|
||
cmp #$9B escape?
|
||
bne H24DF if not.
|
||
sta KBDSTROBE clear keyboard
|
||
H24DF lda RROMBNK2 enable ROM
|
||
jmp sysentry go run interpreter
|
||
|
||
cflag .HS 00 set if a //c.
|
||
|
||
nointrp jsr MLI no interpreter found,so quit.
|
||
.DA #$65
|
||
.DA quitparm
|
||
badlod ldy ierlen center the error message
|
||
lda #$27
|
||
sec
|
||
sbc ierlen
|
||
lsr
|
||
adc ierlen
|
||
tax
|
||
H24FA lda iomess,y
|
||
sta vline16,x
|
||
dex
|
||
dey
|
||
bpl H24FA
|
||
bmi H2511
|
||
toolong ldy #$1E
|
||
H2508 lda lgmess,y
|
||
sta vline16+5,y
|
||
dey
|
||
bpl H2508
|
||
H2511 bmi H2511
|
||
lgmess .AS -"** System program too large **"
|
||
iomess .AS -"** Unable to load"
|
||
.AS -" X.System *********"
|
||
ierlen .HS 00
|
||
opparm .HS 03
|
||
.DA pbuf
|
||
.DA iobuf
|
||
.HS 01
|
||
efparm .HS 02
|
||
.DA #01
|
||
eof .HS 000000 length of file.
|
||
rdparm .HS 04
|
||
.HS 01
|
||
.DA sysentry
|
||
rdlen .HS 0000
|
||
.HS 0000
|
||
clparm .HS 01
|
||
.HS 00
|
||
quitparm .HS 04
|
||
.HS 00
|
||
.HS 0000
|
||
.HS 00
|
||
.HS 0000
|
||
iterp .AS -".SYSTEM" interpreter suffix that is required
|
||
|
||
licode.end .EP
|
||
|
||
* 16 bytes moved to $03F0 vectors
|
||
|
||
H257B .DA breakv
|
||
.DA oldrst
|
||
.DA #$5A powerup byte
|
||
jmp oldrst '&' vector
|
||
jmp oldrst ctrl-y vector
|
||
.HS 004000
|
||
.DA irqent global page interrupt vector
|
||
lc1in lda RRAMWRAMBNK1 read/write language card RAM bank 1
|
||
lda RRAMWRAMBNK1
|
||
rts
|
||
|
||
* determine which system model and save in machine id (idapple)
|
||
|
||
whchrom stz idapple assume standard apple //
|
||
ldx version check hardware id
|
||
cpx #$38 is it apple // (autostart rom)?
|
||
beq H25BE if yes
|
||
lda #$80
|
||
cpx #$06 apple //e?
|
||
beq H25BC if yes
|
||
lda #$40
|
||
cpx #$EA apple //+?
|
||
bne H25B6 it not, then machine is unknown.
|
||
ldx $FB1E apple /// in emulation?
|
||
cpx #$AD
|
||
beq H25BC taken if apple //+.
|
||
lda #$D0 test again for apple /// emulation
|
||
cpx #$8A because will only have 48k memory.
|
||
bne H25B6 if taken, then machine is unknown.
|
||
H25B4 sec apple /// emulation is not allowed
|
||
rts because insufficient memory.
|
||
H25B6 lda #$02 machine unknown
|
||
sta (dst),y
|
||
bne H25D9 always.
|
||
H25BC sta idapple save machine id
|
||
|
||
* check for language card ram
|
||
|
||
H25BE jsr lc1in switch in language card bank 1
|
||
lda #$AA
|
||
sta $D000
|
||
eor $D000 if LC present, result = 0.
|
||
bne H25B4 othewise, insufficient memory.
|
||
lsr $D000 check lc again
|
||
lda #$55
|
||
eor $D000
|
||
bne H25B4 not sufficent memory.
|
||
lda #$20 LC ram is available
|
||
ora idapple
|
||
H25D9 jmp tst128 jumps to page 0 routine below
|
||
|
||
* test for 128k. use page 0 for this routine
|
||
|
||
LDR.Test128 sta idapple H25DC-2621 was moved to location tst128
|
||
bpl not128 if already determined < 128k
|
||
lda #$EE
|
||
sta SETWRITEAUX write to aux mem while on main zp
|
||
sta SETREADAUX and read aux mem.
|
||
sta dbuf write these locs just to test aux mem
|
||
sta $800 1k apart from each other.
|
||
lda dbuf
|
||
cmp #$EE
|
||
bne noaux
|
||
asl dbuf may be sparse mem mapping so
|
||
asl change value and see what happens.
|
||
cmp dbuf
|
||
bne noaux branch if not sparse mapping.
|
||
cmp $800
|
||
bne H2606 if not sparse.
|
||
noaux sec no aux memory available.
|
||
bcs H2607
|
||
H2606 clc
|
||
H2607 sta CLRWRITEAUX switch back to main memory
|
||
sta CLRREADAUX
|
||
bcs not128 if < 128k
|
||
lda idapple
|
||
ora #$30 set id = 128k present
|
||
sta idapple
|
||
not128 lda lookptr+1
|
||
sec
|
||
sbc #$05
|
||
sta lookptr+1
|
||
bcs H2620
|
||
dec lookptr
|
||
H2620 clc
|
||
rts
|
||
LDR.Test128.len .EQ *-LDR.Test128
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE usr/src/prodos.203/prodos.s.ldr.a
|
||
LOAD usr/src/prodos.203/prodos.s
|
||
ASM
|