qlwiki:internal_512k_memory_upgrade [Sinclair QL Wiki]

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 ====== internal 512K memory upgrade ======
Various companies offered to upgrade your QL with an internal memory upgrade.


This was normally 512K, but some companies also offered a 256K version.


The method of upgrade was in two ways - 


  * Removal of the existing QL memory chips and replacement to give a total of 512K
  * An internal board, which connects to the 8301 ULA socket, and has a wire to the 68008 processor.


The downside of this method of upgrading the QL's memory was:\\ 
a) The memory access was slower than external memory\\ 
b) You could not use some of the later QL expansions, such as the [[qlwiki:Trump Card]] which themselves had memory built into the interface.


Internal interfaces were advertised by a range of companies, including [[qlwiki:CST]], [[qlwiki:MicroPeripherals]] and [[qlwiki:Silicon Express]]


{{qlwiki:internal_ram.jpg?direct&240x219  |Unidentified Internal 512K Memory Upgrade}}
{{qlwiki:MP-QMem-Board.jpg?direct&240x219|MicroPeripherals Q-Mem Internal 512K Memory Upgrade}}