mirror of
https://github.com/a2-4am/passport.git
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206 lines
4.5 KiB
Plaintext
206 lines
4.5 KiB
Plaintext
;-------------------------------
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; ScanForDiskII
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; scan all slots for things that
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; look like Disk II cards
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;
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; out: all registers clobbered
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; all flags clobbered
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; DiskIIArray filled with 00 or FF
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;-------------------------------
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!zone {
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ScanForDiskII
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lda #$00
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sta cmp1
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ldx #$07
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.fingerprint
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txa
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ora #$C0
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sta cmp1+1
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ldy #$01
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lda (cmp1),y
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cmp #$20
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bne .next
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ldy #$03
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lda (cmp1),y
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bne .next
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ldy #$05
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lda (cmp1),y
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cmp #$03
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bne .next
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ldy #$FF
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lda (cmp1),y
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bne .next
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tya
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sta DiskIIArray-1,x
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.next
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dex
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bne .fingerprint
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rts
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}
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!zone {
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ScanForRAMDisk
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lda #$00
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sta iunit
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- lda iunit
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clc
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adc #$10
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sta iunit
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beq .done
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cmp #$80
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beq -
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pha
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and #$70
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lsr
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lsr
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lsr
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lsr
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tay
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pla
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ldx DiskIIArray-1,y
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bne -
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jsr GetVolumeName
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bcs -
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lda OnlineReturn
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beq -
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jsr GetVolumeInfo
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;watch for RAM disk type
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lda filetype
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and #$0F
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cmp #$0F
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bne -
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;check for RAM[x] by name
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ldy OnlineReturn
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cpy #4
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beq +
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cpy #5
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bne -
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dey
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+
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-- lda SlashRAM-1,y
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cmp VolumeName-1,y
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bne -
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dey
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bne --
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;check free space
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;need at least $118 blocks
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sec
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lda auxtype
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sbc blocks
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tax
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lda auxtype+1
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sbc blocks+1
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cmp #1
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bcc -
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bne +
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cpx #$18
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bcc -
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+ lda #TRUE
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sta gUsingRAMDisk
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.done
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rts
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SlashRAM !byte $2F, $52, $41, $4D
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}
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;-------------------------------
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; LoadPrefs
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; load preferences from file
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;
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; in: ProDOS must be in memory
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;-------------------------------
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LoadPrefs
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lda #$FF
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sta PREFSVER
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jsr LoadFile1Shot
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!word PREFSFILE
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!word PREFSVER
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!word PREFSREADLEN
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!word PREFSBUFFER
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jsr ValidatePrefs
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bcc .goodprefs
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jmp SavePrefs
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.goodprefs
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rts
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;-------------------------------
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; LoadFile1Shot
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; load a file into memory all at once,
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; using ProDOS MLI calls
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;
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; in: stack contains 8 bytes of parameters:
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; +1 address of pathname
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; +3 address of data buffer (to receive file contents)
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; +5 [word] maximum length of data to read
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; +7 address of ProDOS file buffer
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; out: if C set, load failed and A contains error code
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; from open or read
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; if C clear, load succeeded and ($02) contains
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; data loaded from file
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; all other flags clobbered
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; all registers clobbered
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; stack set to next instruction after parameters
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;-------------------------------
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!zone {
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LoadFile1Shot
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clc
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pla
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sta $00
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adc #$08
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tax
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pla
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sta $01
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adc #$00
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pha
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txa
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pha
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ldy #$01
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lda ($00),y ; lo byte of pathname
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sta mliparam+1
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iny
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lda ($00),y ; hi byte of pathname
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sta mliparam+2
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ldy #$07
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lda ($00),y ; lo byte of ProDOS file buffer
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sta mliparam+3
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iny
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lda ($00),y ; hi byte of ProDOS file buffer
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sta mliparam+4
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jsr OpenFile
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bcs .loadfile1s ; C set on error
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pha ; push file reference number
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ldy #$03
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lda ($00),y ; lo address of data buffer
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sta mliparam+2
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iny
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lda ($00),y ; hi address of data buffer
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sta mliparam+3
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iny
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lda ($00),y ; lo data length
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sta mliparam+4
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iny
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lda ($00),y ; hi data length
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sta mliparam+5
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pla ; pull file reference number
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jsr ReadFile
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php ; save flags from readfile
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pha
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jsr CloseFile ; always close whether read worked or not
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pla
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plp ; restore flags from readfile
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; (so caller gets codes from read attempt,
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; not close)
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.loadfile1s
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rts
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}
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