Page Comparison

...

This allows users to add a new operating system and increase the RAM all in one device externally. None of this would have happened without the support of all the people, past and present, who have been involved in this project. They know who they are, thank you for all your efforts.

The v4.0 ROM

This was the last update made but never released by Cambridge Computer and sold in a Z88. The following software 'bugs' from the previous versions were fixed.

• ROM Cards  - The Z88 got confused if cards were inserted or removed cards while it was switched off. The Z88 now wakes up when the card flap is opened.
• PrinterED  - When updating, it was common to encounter a "FAIL" condition. The "Allow line feeds" option now works correctly.
• RAM.-  - The Z88 got confused if files were present when it was reset.
• Expanded Z88 - Adding an additional 128k RAM anywhere in the system (instead of just in Slot 1) now works (giving a full map in PipeDream, and 40K workspace in BASIC).
• Help Screens - Initially most of them had to be removed to gain space for these changes. These screens have been restored in OZ 4.2/3.

 This version served as the starting point for OZ 4.2.

OZ 4.2

BBC BASIC v 3.1

BBC BASIC has been updated by Richard Russell. This allows you with an expanded machine (with at least 128 Kbytes of RAM), to draw graphics in a 256x64-pixel window using simple BASIC statements. It also provids a BASIC line editor. Commands provided are *EDIT, MODE, CLG, DRAW, MOVE, PLOT and POINT; their syntax is compatible with other versions of BBC BASIC. 

The high-resolution (bit-mapped) graphics now works with the Z88's display. This only worked previously from BASIC by loading and using a small 'patch' program. This only worked with the UK versions, v2.2-3.0 and 4.0 and not with foreign language versions 3.12 to 3.26.

...