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Add I/O Softswitches Memory Map Usage

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michaelangel007
2025-10-21 08:33:40 -07:00
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@@ -34,12 +34,44 @@ $6000|__________|__________| \ C004 RAMWRT
$4000|__________|__________| C000 80STORE
```
# I/O Softswitch Memory Map Usage
```
$C0xy: 0 1 2 3 4 5 6 7 8 9 A B C D E F
$0y: x x x x x x x x x x x x x x x x
$1y: x x x x x x x x x x x x x x x x
$2y: x x x x x x x x x x - x x x x x
$3y: x x x x x x x x x x x x x x x x
$4y: x x x x x x x x x - - - - - - x
$5y: x x x x x x x x x x x x x x x x
$6y: x x x x x x x x x - - - - x x x
$7y: x - - x - - - x x x - - - - x x
$8y: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
$9y: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
$Ay: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
$By: 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
$Cy: 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
$Dy: 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
$Ey: 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
$Fy: 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
Legend:
x used
- Free
0-7 Reserved for slot #
```
See:
* https://www.kreativekorp.com/miscpages/a2info/iomemory.shtml
# History
## Ver 5
* Added I/O Softswitch Map
## Ver 4
* Version number now shown in top left
* Fixed 80STORE=1 display for HGR1 and TEXT1
* Removed most odd addresses in the main 48 KB as they were cluttering up the display too much.