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* [[Dk'tronics_memory_expansion|DK'tronics 64K RAM pack Memory Expansion]] (removable RAM chips) >> upgraded to [[Media:Upgraded64kRAM.JPG|256K]] - [[Upgrading_a_Dk%27tronics_RAM_Expansion|instructions]]
* [[Rombo_Rombox|Rombo ROMBOX]] with following ROMS from RAM pack pass-through connector (- '''OPTIONAL!!''' But it makes computing much easier), leaving out both slots 0 ([[BASIC]]) & 7 ([[AMSDOS]]) remaining unused: <BR>
:* Slot 1: [[BCPL]] - Compiler from PJB & Arnor Ltd.
:* Slot 2: [[Maxam]] - Assembler from Arnor Ltd.