Difference between revisions of "Memory Map"
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<tr><th>Memory Range<th>Accessibility<th>Device</th></tr> | <tr><th>Memory Range<th>Accessibility<th>Device</th></tr> | ||
<tr><td>$0000-$003F</td><td>RW</td><td>STIC Registers</td></tr> | <tr><td>$0000-$003F</td><td>RW</td><td>STIC Registers</td></tr> | ||
− | <tr><td>$0100-$01EF</td><td>RW</td><td>RAM | + | <tr><td>$0100-$01EF</td><td>RW</td><td>[[Scratchpad RAM]]</td></tr> |
<tr><td>$01F0-$01FF</td><td>RW</td><td>PSG Registers</td></tr> | <tr><td>$01F0-$01FF</td><td>RW</td><td>PSG Registers</td></tr> | ||
− | <tr><td>$0200-$035F</td><td>RW</td><td>RAM</td></tr> | + | <tr><td>$0200-$035F</td><td>RW</td><td>[[System RAM]]</td></tr> |
− | <tr><td>$1000-$1FFF</td><td>R</td><td>Executive ROM</td></tr> | + | <tr><td>$1000-$1FFF</td><td>R</td><td>[[Executive ROM]]</td></tr> |
− | <tr><td>$3000-$37FF</td><td>R</td><td>Graphics ROM</td></tr> | + | <tr><td>$3000-$37FF</td><td>R</td><td>[[Graphics ROM]]</td></tr> |
− | <tr><td>$3800-$39FF</td><td>RW</td><td>Graphics RAM</td></tr> | + | <tr><td>$3800-$39FF</td><td>RW</td><td>[[Graphics RAM]]</td></tr> |
</table> | </table> | ||
Revision as of 23:49, 10 January 2005
Official Memory Map
The "official" memory map published by Mattel is included below.
Memory Range | Accessibility | Device |
---|---|---|
$0000-$003F | RW | STIC Registers |
$0100-$01EF | RW | Scratchpad RAM |
$01F0-$01FF | RW | PSG Registers |
$0200-$035F | RW | System RAM |
$1000-$1FFF | R | Executive ROM |
$3000-$37FF | R | Graphics ROM |
$3800-$39FF | RW | Graphics RAM |
Additional Memory Aliases
Note that the official memory map shown above is actually incomplete, due to the fact that the STIC and the Graphics RAM chip incompletely decoded addresses that were placed on the address bus.
Memory Range | Accessibility | Device |
---|---|---|
$3A00-$3BFF | RW | Graphics RAM |
$3C00-$3DFF | RW | Graphics RAM |
$3E00-$3FFF | RW | Graphics RAM |
$4000-$403F | W | STIC Registers |
$7800-$79FF | W | Graphics RAM |
$7A00-$7BFF | W | Graphics RAM |
$7C00-$7DFF | W | Graphics RAM |
$7E00-$7FFF | W | Graphics RAM |
$8000-$803F | W | STIC Registers |
$B800-$B9FF | W | Graphics RAM |
$BA00-$BBFF | W | Graphics RAM |
$BC00-$BDFF | W | Graphics RAM |
$BE00-$BFFF | W | Graphics RAM |
$C000-$C03F | W | STIC Registers |
$F800-$F9FF | W | Graphics RAM |
$FA00-$FBFF | W | Graphics RAM |
$FC00-$FDFF | W | Graphics RAM |
$FE00-$FFFF | W | Graphics RAM |