... le environment. 128K Memory The additional RAM could not simply be added to the Spectrum's existing 64K address space. The Z80A can address only 64K of memory at a time, so the 128K machine uses a system of memory paging to select which par ...
... to use memory more efficiently, potentially improve execution speed and make more of the machine's 64K address space available for game code. The remainder of the game is loaded from cassette. A built-in joystick port avoids the need for g ...
... ged Random Access Memory. RAM16 - As above but this time 16K. RAM64 - Again extra paged memory, now 64K (requires MINIMAP module). DROM - Non-volatile storage. TOOLKIT - 8K of utilities in EPROM. CLOCK - A real-time clock with battery back- ...
... rlays the current ZX Spectrum ROM area which allows games programmers to use the ZX Spectrum's full 64K memory allowed by the Z80A processor. £14.9527 28 Micro-Pad Programmable, no through port £23.002 Page Computing Programmable with rap ...