mirror of
https://github.com/Michaelangel007/apple2_softswitch.git
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47 lines
1.3 KiB
Markdown
47 lines
1.3 KiB
Markdown
# Apple 2 Soft Switch
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Inspired by Anthony's program over in [c.s.a2](https://groups.google.com/d/msg/comp.sys.apple2/knWRdHp9ZTc/TWV5ZkyTCQAJ) here is a Applesoft BASIC program to display a memory map and limited soft switches.
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# Commands
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* ESC = exit
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* SPC = toggle status lines to show description / soft-switch addresss
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NOTE: The IO soft switch address don't exactly match the hardware switches due to:
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a) some are contiguous
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b) some require multiple locations to activate (i.e. TEXT/GR and Lo-Res/Hi-Res)
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# Future Versions?
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Removing the `RW` columns gives us a little more space on the right
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Mock-up
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```
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v4 ___READ___ __WRITE___
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$FFFF| ROM | ROM | C088 BANK2
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$E000|__________|__________| /C081 HRAMWRT
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| ROM | ROM | / C080 HRAMRD
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$D000|__________|__________|/ C057 HIRES
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:__________:__________: C055 PAGE2
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$BFFF| AUX | AUX |\ C008 ALTZP
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$6000|__________|__________| \ C004 RAMWRT
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| AUX | AUX | \C002 RAMRD
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$4000|__________|__________| C000 80STORE
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```
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# History
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## Ver 4
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* Version number now shown in top left
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* Fixed 80STORE=1 display for HGR1 and TEXT1
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* Removed most odd addresses in the main 48 KB as they were cluttering up the display too much.
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