Y-MEM: Difference between revisions
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The '''Y-MEM''' expansion made by TotO from ACME is a similar expansion as the X-MEM. The difference is the addressing of RAM and ROM | The '''Y-MEM''' expansion made by [[TotO]] from [[ACME]] is a similar expansion as the X-MEM. The difference is the addressing of RAM and ROM | ||
While the X-MEM addresses the lower ROM, ROMs 0-6 and 8-31, the Y-MEM addresses the ROMs from 32 to 63. | While the X-MEM addresses the lower ROM, ROMs 0-6 and 8-31, the Y-MEM addresses the ROMs from 32 to 63. | ||
Revision as of 09:28, 11 March 2018
The Y-MEM expansion made by TotO from ACME is a similar expansion as the X-MEM. The difference is the addressing of RAM and ROM
While the X-MEM addresses the lower ROM, ROMs 0-6 and 8-31, the Y-MEM addresses the ROMs from 32 to 63.
The X-MEM allows to access 512 KB RAM using the port &7Fxx. But the Y-MEM addresses another 512 KB using the port &7Exx.
Using the X-MEM and the Y-MEM together provides 1 MB of expansion RAM and 1 MB of Flash-ROM for the CPC or Plus computers.
Software
The Y-MEM (RAM and ROM) is fully supported by FutureOS