This cartridge works on the following PCBs and with the following models of Spectrum:
This 3rd party 16K ROM cartridge produced by Brendan Alford performs a variety of tests to assist in the diagnosis of Spectrum faults.
The ROM performs the following categories of tests:
- Lower 16K RAM
- Upper 32K RAM
- Spectrum 128 RAM
- Memory soak test
If the lower 16K RAM test fails then an attempt is made to display a message showing the bits is error. The bit status is also displayed as a set of stripes in the border, the top most stripe representing bit 0 (green if the bit is good, red if the bit is bad).
When adding to a ZX ROM Cartridge Creator compilation, make sure the 'Paging Locked' option is set to 'None'.
Full details about the tests performed, along with the ROM and its source for download are available from the ZX Spectrum Diagnostics website.