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Comment: Updated where to find what version of OZ is running.

Adding at least 128K of extra RAM to the Cambridge Z88 will change it from being an 'unexpanded' machine, to an expanded machine, the preferred configuration.

An expanded machine will allow the use of a large BASIC work space and a larger map size in PipeDream. 

As the OZ 4.5 ROM needs to be in Slot 1, the rules on what happens with different size RAM cards are slightly different than the standard machine.

To solve all the problems with RAM, please use either the 512K/512K Flash/RAM or the 1M/1M Flash/RAM combination.

Slot 0
Slot 1Slot 2
by Z88
for files
Unexpanded Z88
32K1M FlashEmpty19.2K0K12.8K
32K1M Flash32K8K24K12.8K
Expanded Z88
32K1M Flash128K40K88K 
32K1M Flash512K40K472K 
32K1M Flash1024K40K984K 
32K512K / 512K

The Z88 uses some of the extra RAM for itself internally for Applications and BBC BASIC. You will quickly discover that you need more RAM than you think.

The following example assumes using a 20K document in Pipedream with a 128K RAM Pack.

Size of RAM128K
Amount used by Z88 (expanded machine)40K
Amount left88K
Additional amount used by Pipedream20K
Amount required to store the file in :RAM.120K
Amount left48K

Remember If you have not got enough space to save the file to RAM, you will not be able to save it to the Flash or EPROM Pack..

To find out what version of operating system is fitted, press the key and then the Image Removed key. When you then press the Image Removed key, the Image AddedINFO for the System Information page. The Cambridge Z88 will display the Operating System version number and other details. Press the key to return to the Index.