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Color Computer 2 Memory Map: Difference between revisions
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(→Overview: corr) |
(→Overview: adapted to American style number notation) |
||
Line 15: | Line 15: | ||
|0400 | |0400 | ||
|05FF | |05FF | ||
| 0 | | 0.5 | ||
|Text screen memory | |Text screen memory | ||
|- | |- | ||
Line 25: | Line 25: | ||
|0600 | |0600 | ||
|1DFF | |1DFF | ||
| 4 | | 4.5 | ||
|Full graphic 6 / pmode 3 & 4 page 1 | |Full graphic 6 / pmode 3 & 4 page 1 | ||
|- | |- | ||
Line 35: | Line 35: | ||
|1E00 | |1E00 | ||
|35FF | |35FF | ||
| 4 | | 4.5 | ||
|Full graphic 6 / pmode 3 & 4 page 2 | |Full graphic 6 / pmode 3 & 4 page 2 | ||
|- | |- | ||
Line 60: | Line 60: | ||
|E000 | |E000 | ||
|FEFF | |FEFF | ||
|7 | |7.75 | ||
|Unused | |Unused | ||
|- | |- | ||
|FF00 | |FF00 | ||
|FFFF | |FFFF | ||
|0 | |0.25 | ||
|[[#Input/Output Area|Input/Output Area]] | |[[#Input/Output Area|Input/Output Area]] | ||
|} | |} |
Revision as of 22:51, 4 May 2013
Overview
Start address | End address | Size (KB) | Contents |
---|---|---|---|
0000 | 03FF | 1 | System Use |
0400 | 05FF | 0.5 | Text screen memory |
0600 | 7FFF | 32 | Free RAM (depending on use of graphics pages or DECB) |
0600 | 1DFF | 4.5 | Full graphic 6 / pmode 3 & 4 page 1 |
0600 | 18CE | 4 | DECB Use (CONFLICT WITH GRAPHICS PAGE 1) |
1E00 | 35FF | 4.5 | Full graphic 6 / pmode 3 & 4 page 2 |
8000 | 9FFF | 8 | Extended BASIC ROM |
A000 | BFFF | 8 | COLOR BASIC ROM |
C000 | DFFF | 16 | Cartridge ROM |
C000 | D800 | 6 | Disk BASIC ROM |
E000 | FEFF | 7.75 | Unused |
FF00 | FFFF | 0.25 | Input/Output Area |
Input/Output Area
Start address | End address | Contents / Function |
---|---|---|
FF00 | FF1F | Peripheral Interface Adapter (PIA) 0 |
FF00 | PIA0 data port A: Keyboard rows & joystick button | |
FF01 | PIA0 control port A: Horizontal sync & interrupt control | |
FF02 | PIA0 data port B: Keyboard columns | |
FF03 | PIA0 control port B: Vertical sync control | |
FF04 | FF1F | PIA0 mirrors |
FF20 | FF3F | Peripheral Interface Adapter (PIA) 1 |
FF20 | PIA1 data port A: sound/cassette/RS-232 output/input | |
FF21 | PIA1 control port A: Cassette motor control | |
FF22 | PIA1 data port B: VDG control | |
FF23 | PIA1 control port B: FIRQ & sound control | |
FF24 | FF3F | PIA1 mirrors |
FF40 | FF5F | Diskette I/O usage |
FF60 | FF7F | Miscellaneous external hardware control |
FF80 | FFBF | Unused in CoCo 1 & 2 |
FFC0 | FFDF | SAM registers (screen mode & offset) |
FFE0 | FFF1 | Reserved |
FFF2 | FFFF | Interrupt vectors |