Editing Cambridge Z88 (section)

== Postmarket upgrades ==
{{original research section|date=August 2019}}
[[file:Cambridge Computers Z88 (44656898264).png|thumb|The stand and port of the Cambridge Z88]]

Since 1998, a 1&nbsp;[[Byte#Multiple-byte_units|MiB]] [[Flash memory]] card is available which provides convenient [[non-volatile memory|non-volatile]] storage. Once written to the card, files are safe and not reliant on a power supply. Unlike traditional EPROM cards (erased with an external [[ultraviolet]] light), this one can be electrically erased in the computer's slot. The first generation of card only worked in slot 3 where a 12&nbsp;[[volt|V]] signal (Vpp) is available. The later generation is based on [[Advanced Micro Devices|AMD]] chips and runs with 5&nbsp;V for erasure. It is possible to read, write and erase flash cards in the three slots and the internal one.

It is also possible for an experienced user to replace the built-in 32&nbsp;kB RAM chip with a bigger 128 or 512&nbsp;kB [[Static random-access memory|static RAM]] chip. However, the latter requires some extra board modifications, and 512&nbsp;kB is the biggest size that can be addressed by the Z88 for the internal RAM. A similar modification is possible for the internal ROM slot. A 512&nbsp;kB flash chip can replace the original ROM, allowing an upgrade of the operating system.