Editing Cambridge Z88 (section)

== Design ==
[[file:CambridgeZ88.jpg|thumb|The 8-line LCD display used by the Z88]]

The Z88 is a notebook computer weighing {{convert|0.9|kg|abbr=on}}, based on a low-power [[CMOS]] version of the popular [[Zilog Z80]] [[microprocessor]]. It comes with 32&nbsp;[[kilobyte|kB]] of internal pseudo-static [[random-access memory|RAM]] and 128&nbsp;kB of [[read-only memory|ROM]] containing the [[operating system]] (called ''OZ''). The memory can be expanded up to 3.5&nbsp;[[Megabyte|MB]] of RAM, the contents of which are preserved across sessions. An integrated capacitor prevents the Z88 from losing its data for the limited time it takes to change the batteries.

The machine uses a [[membrane keyboard]], which is almost silent in use; an optional electronic "click" can be turned on to indicate keystrokes. The Z88 is powered by four [[battery (electricity)#common battery sizes|AA batteries]], giving up to 20 hours of use. It has three memory card slots, which accommodate proprietary RAM, [[EPROM]] or [[flash memory|flash cards]], the third slot being equipped with a built-in EPROM programmer. Card capacities range from 32&nbsp;kB to 1&nbsp;[[megabyte|MB]].

The Z88 has a built-in eight-line, 64 × 640 pixel [[super-twisted nematic display]] which has greater contrast than conventional [[twisted nematic]] LCDs.

The 64&nbsp;kB addressable by the Z80 processor are divided in four banks of 16&nbsp;kB each. The maximum memory of 4&nbsp;MiB for the system is also divided in 256 segments of 16&nbsp;kB each. The hardware can map any of the 16&nbsp;kB blocks to any of the four banks. The first 512&nbsp;kB are reserved for ROM; the next 512&nbsp;kB are reserved for internal RAM. The next 3&nbsp;MB are assigned to each one of the three memory slots.