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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. | ||
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[[Category:FutureOS]] | [[Category:FutureOS]] | ||
[[Category:Peripherals]] | [[Category:Peripherals]] | ||
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| + | Website: [http://centpourcent.net centpourcent.net] | ||
Latest revision as of 20:31, 5 April 2025
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
Website: centpourcent.net