Handling switches correctly.
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parent
9f38bb4c43
commit
7c2c18bb43
85
online.asm
85
online.asm
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@ -39,7 +39,8 @@ extrncmd = $be06 ; External command JMP vector
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xtrnaddr = $be50 ; Execution address of external command
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xlen = $be52 ; Length of command string-1
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xcnum = $be53 ; BASIC cmd number (external command = 0)
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pbits = $be54 ; Parameter bits
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pbits = $be54 ; Parameter bits allowed (2 bytes)
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fbits = $be56 ; Parameter bits found
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vslot = $be61
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vdriv = $be62
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gosystem = $be70
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@ -48,6 +49,27 @@ sunitnum = $bec7
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sbufadr = $bec8
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getbufr = $bef5
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; Parameter bits flags (note setup for two bytes and for lo/hi usage)
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pfix = $0080 ; Prefix needs fetching, pathname optional
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slot = $0040 ; No parameters to be processed
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rrun = $0020 ; Command only valid during program
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fnopt = $0010 ; Filename is optional
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crflg = $0008 ; CREATE allowed
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t = $0004 ; File type
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fn2 = $0002 ; Filename #2 for RENAME
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fn1 = $0001 ; Filename expected
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ad = $8000 ; Address
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b = $4000 ; Byte
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e = $2000 ; End address
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l = $1000 ; Length
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line = $0800 ; '@' line number
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sd = $0400 ; Slot and drive numbers
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f = $0200 ; Field
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r = $0100 ; Record
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v = $0000 ; Volume number ignored
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; MONITOR locations:
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crout = $fd8e
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@ -131,6 +153,8 @@ entry:
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cpx #cmdlen
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bne :--
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; Setup for BASIC.SYSTEM to parse
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opts = fnopt|sd ; Filename is optional (due to glitch) and slot and drive
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lda #cmdlen-1
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sta xlen
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lda #<online
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@ -138,12 +162,10 @@ entry:
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lda #>online
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sta xtrnaddr+1
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stz xcnum
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lda #$10 ; Filename is optional
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lda #<opts
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sta pbits
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lda #$04 ; Slot and drive numbers
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lda #>opts
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sta pbits+1
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stz vslot
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stz vdriv
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clc
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rts
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@ -151,12 +173,6 @@ notOurCommand:
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sec
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jmp (nextcmd)
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nextcmd: .word 0
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cmdtable:
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asciih "ONLINE"
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cmdlen = *-cmdtable
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;
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; Perform ONLINE command
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; Note we use the input buffer address
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@ -173,8 +189,11 @@ cmdlen = *-cmdtable
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; S5 D1 ERR=$57 (S7 D1)
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;
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online:
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lda vdriv
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asl
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lda #>sd
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bit fbits+1
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beq @1 ; Bit was NOT set
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lda vdriv ; 1 or 2, use 2nd bit to toggle drive (then drive 1 has bit off, drive 2 has bit on)
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and #%00000010
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asl
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asl
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ora vslot
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@ -183,13 +202,13 @@ online:
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asl
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asl
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sta sunitnum
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stz sbufadr
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@1: stz sbufadr
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lda #>buffer
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sta sbufadr+1
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lda #$C5 ; ONLINE system command
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; Note: if we have a specific unit, this is not zero terminated -- fake it!
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stz buffer+16
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lda #$C5 ; ONLINE system command
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jsr gosystem
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bcc @continue
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rts
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@continue:
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ldx #0
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@ -197,8 +216,7 @@ online:
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ldy buffer,x
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beq @exit
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jsr printsd
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lda #' '|$80
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jsr cout
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jsr printspc
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tya
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and #$0f
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beq @deverr
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@ -225,22 +243,20 @@ online:
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jmp crout
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; A device error message
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@deverr:
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lda #'E'|$80
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ldy #0
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: lda msgERR,y
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beq :+
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jsr cout
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lda #'R'|$80
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jsr cout
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jsr cout
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lda #'='|$80
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jsr cout
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inx
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iny
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bne :-
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: inx
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lda buffer,x
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tay ; short-term save
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jsr prbyte
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tya
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cmp #$57 ; duplicate volume error
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bne @adjust
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lda #' '|$80
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jsr cout
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jsr printspc
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lda #'('|$80
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jsr cout
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inx
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@ -271,5 +287,18 @@ printsd:
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adc #'1'|$80 ; ... making the '1' a '2'
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jmp cout
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printspc:
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lda #' '|$80
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jmp cout
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msgERR:
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asciizh "ERR=$"
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cmdtable:
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asciih "ONLINE"
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cmdlen = *-cmdtable
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nextcmd: .word 0
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_CodeEndAddress:
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