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36 lines
1.4 KiB
Plaintext
36 lines
1.4 KiB
Plaintext
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; Copyright 2018 faddenSoft. 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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; Sources:
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; Various Apple II reference materials found online
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*SYNOPSIS C08x I/O locations for the Disk ][
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; Disk ][ I/O base address locations.
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;
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; A few things hard-code slot 6 for disk access, in which case addresses
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; like $C0E8 will work here. It's far more common for code to use indexed
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; addressing like "LDA $C088,X", which clashes with the slot 0
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; definitions for the language card. SourceGen doesn't distinguish
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; between direct and indexed access to a location when resolving platform
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; symbols, so you can have one or the other.
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;
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; Other peripherals may use a similar system of indexing, so it's useful
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; to have each in a separate file.
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IWM_PH0_OFF @ $C080 ;IWM phase 0 off
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IWM_PH0_ON @ $C081 ;IWM phase 0 on
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IWM_PH1_OFF @ $C082 ;IWM phase 1 off
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IWM_PH1_ON @ $C083 ;IWM phase 1 on
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IWM_PH2_OFF @ $C084 ;IWM phase 2 off
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IWM_PH2_ON @ $C085 ;IWM phase 2 on
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IWM_PH3_OFF @ $C086 ;IWM phase 3 off
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IWM_PH3_ON @ $C087 ;IWM phase 3 on
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IWM_MOTOR_OFF @ $C088 ;IWM motor off
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IWM_MOTOR_ON @ $C089 ;IWM motor on
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IWM_DRIVE_1 @ $C08A ;IWM select drive 1
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IWM_DRIVE_2 @ $C08B ;IWM select drive 2
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IWM_Q6_OFF @ $C08C ;IWM read
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IWM_Q6_ON @ $C08D ;IWM WP-sense
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IWM_Q7_OFF @ $C08E ;IWM WP-sense/read
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IWM_Q7_ON @ $C08F ;IWM write
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