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66 lines
2.2 KiB
Plaintext
66 lines
2.2 KiB
Plaintext
; 2021 didierv from dmaconcept / CEO member.
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; Version 1.00 of the file
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;
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; Sources:
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; Various Oric reference materials found online
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; Reference to Oric Atmos Rom 1.1
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; Oric a nu from Fabrice Broche
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; Oric Advanced User Guide from Leycester Whewell
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*SYNOPSIS Symbols from the I/O area, on Oric Atmos model.
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; ---------------------------------------------------------------------------
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; General structure
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PTR_BASIC @ $0501 ; Début de la zone Basic (1281)
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PTR_TXT_CHR1 @ $B400 ; Adresse du charset en mode Txt (46080)
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PTR_TXT_CHR2 @ $B800 ; Adresse du charset alt en mode Txt (47104)
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PTR_TXT @ $BB80 ; 1st byte text screen (48000)
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PTR_HR_CHR1 @ $9800 ; Adresse du charset en mode Hires (38912)
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PTR_HR_CHR2 @ $9B00 ; Adresse du charset alt en mode Hires (39680)
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PRR_HIRES @ $A000 ; 1st byte hires screen 200*40 + 3 text lines (40960)
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; ---------------------------------------------------------------------------
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; Zero page
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; ---------------------------------------------------------------------------
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; Page 1
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; ---------------------------------------------------------------------------
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; Page 2
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; ---------------------------------------------------------------------------
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; Page 3 I/O Locations
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; 6522
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; Versatile Interface Adapter
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PRB @ $300 ; Port Register B
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PRA @ $301 ; Port Register A with handcheck
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DDRB @ $302 ; Data Direction Register B
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DDRA @ $303 ; Data Direction Register A
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T1 @ $304 ; OMS Timer 1
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T1L @ $305 ; OPS Timer 1 Latch
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T1TIMER @ $306
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T1TIMERL @ $307
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T2 @ $308 ; OMS Timer 2
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T2L @ $309 ; OPS Timer 2 Latch
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SR @ $30A ; Shift Register
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ACR @ $30B ; Auxiliary Control Register
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PCR @ $30C ; Peripheral Control Register CA1, CA2, CB1 et CB2
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IFR @ $30D ; Interrupt Flags Register
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IER @ $30E ; Interrupt Enable Register
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PRA2 @ $30F ; Port Register A without handshaking
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; ---------------------------------------------------------------------------
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; 6502 Vectors
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NMIVECT @ $FFFA ; $0247
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NMIVECTH @ $FFFB
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RSTVECT @ $FFFC ; $F88F
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RSTVECTH @ $FFFD
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IRQVECT @ $FFFE ; $0244
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IRQVECTH @ $FFFF
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