A collection of resources for the UK101 personal computer released in 1979

 
32K RAM and 16K EPROM upgrade

The UK101 came as standard with 4K or 8K of 2114 static RAM chips. These were 4 kilo-bit memories so that two were needed for each K of on-board RAM. A fully populated board would have 16 of the memory chips. As each chip needed some 70mA they represented a huge load on the 3A power supply.

This upgrade replaces the on-board RAM with a modern 32K x 8-bit static CMOS RAM. This is not only faster but also it uses a fraction of the power.

In addition the on-board 2K PROM chips holding BASIC have been replaced by a custom 16K EPROM. This also allows for BASIC to be upgraded using Premier Publications BASIC 5 and BASIC X.

   
BASIC 4 This is an upgrade to the original BASIC 4 ROM produced by Premier Publications. The download includes the manual and the ROM image.
   
BASIC 5 This is the BASIC 5 ROM produced by Premier Publications. The download includes the manual and the ROM image.
   
BASIC X This is the BASIC X ROM produced by Premier Publications. The download includes the manual and the ROM image.
   
BASIC 1-4 A collection of the original BASIC ROMs for the UK101.
   
16K EPROM The 16K EPROM image for the UK101 upgrade. The image includes the original BASIC ROMs, BASIC 5 and BASIC X. This has been tested as working although not every BASIC 5 and BASIC X command has been tested.

Whilst experimenting with various ROM images it was discovered that the Premier Publications ROM images for their corrected ROMs caused instability and frequent crashes. This ROM image therefore uses the original BASIC ROMs.
   
   
   
   
   
   
   
   
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