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https://github.com/cc65/cc65.git
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69 lines
1.8 KiB
PHP
69 lines
1.8 KiB
PHP
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; Oric Telemon definition
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; Telemon 2.4
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;
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; ---------------------------------------------------------------------------
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; Constants
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SCREEN_XSIZE = 40 ; screen columns
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SCREEN_YSIZE = 28 ; screen rows
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FUNCTKEY = $A5
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FNAME_LEN = 11 ; maximum length of file-name
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; ---------------------------------------------------------------------------
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; Zero page
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; ---------------------------------------------------------------------------
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; Low memory
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; ---------------------------------------------------------------------------
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; I/O locations
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; 6522
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.struct VIA ; Versatile Interface Adapter
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.res $0300
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PRB .byte ; Port Register B
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PRA .byte ; Port Register A
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DDRB .byte ; Data Direction Register B
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DDRA .byte ; Data Direction Register A
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T1 .word ; Timer 1
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T1L .word ; Timer 1 Latch
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T2 .word ; Timer 2
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SR .byte ; Shift Register
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ACR .byte ; Auxiliary Control Register
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PCR .byte ; Peripheral Control Register
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IFR .byte ; Interrupt Flags Register
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IER .byte ; Interrupt Enable Register
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PRA2 .byte ; Port Register A without handshaking
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.endstruct
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; 6551
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.struct ACIA ; Asynchronous Communications Interface Adapter
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.res $031C
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DATA .byte
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STATUS .byte
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CMD .byte ; Command register
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CTRL .byte ; Control register
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.endstruct
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SCREEN := $BB80
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; ---------------------------------------------------------------------------
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; ROM entries
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XWR0 := $10
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XWSTR0 := $14
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