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https://github.com/flowenol/applesoft-lite.git
synced 2024-06-15 12:29:32 +00:00
Added support for alternative memory locations of Apple-1 Serial Interface Card
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parent
943d2298f4
commit
3e759e4d21
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@ -1,5 +1,5 @@
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MEMORY {
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BASROM: start = $6000, size = $2000, fill = yes, file = %O;
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BASROM: start = $6000, size = $200A, fill = yes, file = %O;
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}
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SEGMENTS {
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@ -7,11 +7,20 @@
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.import ERROR, FIX_LINKS, OUTDO
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.export SerialLoad, SerialSave, SerialMenu
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SERIAL_MONITOR := $C100
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SERIAL_READY := $C000
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SERIAL_ID := $C0FC
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SERIAL_API_READ := $C1EC
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SERIAL_API_WRITE := $C213
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SERIAL_MONITOR_C000 := $C100
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SERIAL_READY_C000 := $C000
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SERIAL_ID_C000 := $C0FC
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SERIAL_API_READ_C000 := $C1EC
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SERIAL_API_WRITE_C000 := $C213
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SERIAL_MONITOR_C300 := $C400
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SERIAL_READY_C300 := $C300
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SERIAL_ID_C300 := $C3FC
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SERIAL_API_READ_C300 := $C4EC
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SERIAL_API_WRITE_C300 := $C513
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; 0 - $C000, 1 - $C300
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SERIAL_VARIANT := $40
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; ZP locations get backed up here
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ZPTemp := $0380
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@ -34,18 +43,37 @@ STR2INT_END := $0A
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; See if Apple-1 Serial Interface card is present and display error if not
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; ----------------------------------------------------------------------------
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CheckSerial:
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ldy SERIAL_ID
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ldy SERIAL_ID_C000
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cpy #'A'
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bne @1
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ldy SERIAL_ID_C000 + 1
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cpy #'1'
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bne @1
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ldy SERIAL_ID_C000 + 2
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cpy #'S'
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bne @1
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ldy SERIAL_ID_C000 + 3
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cpy #'I'
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bne @1
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lda #$00
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sta SERIAL_VARIANT
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rts
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@1:
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ldy SERIAL_ID_C300
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cpy #'A'
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bne SerialErr
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ldy SERIAL_ID + 1
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ldy SERIAL_ID_C300 + 1
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cpy #'1'
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bne SerialErr
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ldy SERIAL_ID + 2
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ldy SERIAL_ID_C300 + 2
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cpy #'S'
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bne SerialErr
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ldy SERIAL_ID + 3
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ldy SERIAL_ID_C300 + 3
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cpy #'I'
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bne SerialErr
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lda #$01
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sta SERIAL_VARIANT
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rts
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SerialErr:
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@ -61,8 +89,13 @@ SynErr:
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; ----------------------------------------------------------------------------
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SerialMenu:
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jsr CheckSerial
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jsr SERIAL_MONITOR
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lda SERIAL_VARIANT
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bne SerialMenuAlt
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jsr SERIAL_MONITOR_C000
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rts
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SerialMenuAlt:
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jsr SERIAL_MONITOR_C300
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rts
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; ----------------------------------------------------------------------------
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; Save program via the Apple-1 Serial Interface
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@ -87,10 +120,15 @@ SerialSave:
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lda TXTTAB+1
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sta BEG_ADDR_H
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jsr SERIAL_API_WRITE
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lda SERIAL_VARIANT
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bne @2
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jsr SERIAL_API_WRITE_C000
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jmp @3
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@2:
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jsr SERIAL_API_WRITE_C300
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@3:
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jsr RestoreZPForSave ; Put the zero page back
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rts
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; ----------------------------------------------------------------------------
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; Restores the 4 bytes of the ZP which were saved during SerialSave
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; ----------------------------------------------------------------------------
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@ -137,15 +175,17 @@ GetLength: ; Get file name from input line
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@2:
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cpy #0 ; Read 6 chars or EOL, did we get anything?
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beq SynErr
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bne @3
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jmp SynErr
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@3:
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lda #STR2INT_END ; append integer string end marker
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sta STR2INT_BUF,y
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jsr String2Int
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lda STR2INT_INT
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bne @3
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bne @4
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dec STR2INT_INT+1
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@3:
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@4:
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dec STR2INT_INT
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clc
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SetLoadAddresses:
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@ -164,7 +204,13 @@ SetLoadAddresses:
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lda TXTTAB+1
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sta BEG_ADDR_H
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jsr SERIAL_API_READ
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lda SERIAL_VARIANT
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bne @1
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jsr SERIAL_API_READ_C000
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jmp @2
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@1:
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jsr SERIAL_API_READ_C300
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@2:
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jsr RestoreZPForLoad ; Put the zero page back
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jmp FIX_LINKS
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