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30 lines
653 B
Plaintext
30 lines
653 B
Plaintext
; Copyright 2018 David Schmidt. All Rights Reserved.
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; See the LICENSE.txt file for distribution terms (Apache 2.0).
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;
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; Adapted from Apple /// reference materials
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;
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*SYNOPSIS Symbols from hardware I/O areas
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KBD @ $C000 ;last key pressed + 128
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; Other hardware registers
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Z_REG @ $FFD0
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D_DDRB @ $FFD2
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D_DDRA @ $FFD3
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TIMER1L @ $FFD8
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TIMLATCH @ $FFD9
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D_ACR @ $FFDB
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D_PCR @ $FFDC
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D_IFR @ $FFDD
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D_IER @ $FFDE
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E_REG @ $FFDF ;environment register (r/w)
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E_IORB @ $FFE0
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E_DDRB @ $FFE2
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E_DDRA @ $FFE3
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E_ACR @ $FFEB
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E_PCR @ $FFEC
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E_IFR @ $FFED
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E_IER @ $FFEE
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B_REG @ $FFEF
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