Difference between revisions of "Memory Map"
Line 44: | Line 44: | ||
<br /><br /> | <br /><br /> | ||
Related Subjects: | Related Subjects: | ||
− | <blockquote>Incomplete Address Decoding</blockquote> | + | <blockquote>[[Incomplete Address Decoding]]</blockquote> |
<br /> | <br /> |
Revision as of 18:01, 10 January 2005
The "official" memory map published by Mattel is included below.
OFFICIAL MEMORY MAP
Memory Range | Accessibility | Device |
---|---|---|
$0000-$003F | RW | STIC Registers |
$0100-$01EF | RW | RAM 8-bit |
$01F0-$01FF | RW | PSG Registers |
$0200-$035F | RW | RAM |
$1000-$1FFF | R | Executive ROM |
$3000-$37FF | R | Graphics ROM |
$3800-$39FF | RW | Graphics RAM |
Note that the official memory map shown above is actually incomplete, due to the fact that the STIC and the Graphics RAM chip did not completely decode addresses that were placed on the address bus.
ADDITIONAL MEMORY ALIASES
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 |
Related Subjects:
Incomplete Address Decoding