(C) 2022 Alvaro Alea Fernandez
License under: CERN Open Hardware Licence Version 2 - Strongly Reciprocal
https://ohwr.org/cern_ohl_s_v2.txt
This is based on the work of McLeod Ideafix, Jose Leandro, Zerover and tcat between others.
This board will provide aditional 512kB of static RAM (fast-ram) to the sinclair QL.
It is incompatible with any aditional memory expansion on the QL.
Provide a expansion conector to allow conect aditional interfaces.
There area available 4 configuration trough solder jumpers in the PCB.
- 512kB - This is the standar 512kB expansion for any QL
- 256kB - This is for use as a second expansion, use the full QL space for a maximun of 898kB, be aware that this is incompatible with a lot of expansion card, so use with caution (Any expansion card that do not use jumper for configuration will be incompatible).
- 192kB - Similar to 256kB provide aditional space for expansion cards correctly configured.
- 128kB - Similar to 256kB provide aditional space for expansion cards correctly configured.
Be aware that the configuration of 128Kb can not be installed alone. For be able to use 128kB, for a total of 768kB, is mandatory to have an aditional expansion card that put ROM in address E00000h, in other case the QL ROM will hang indicating RAM malfunction, because a weired overlap of the internal 128kB with this external 128kB.
https://www.instagram.com/p/CZWfWcUM5mx/
In the GAL folder there is the source code for winculp
