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Hires Test

My first HiRes test - to display a 256x192 bitmap on a real ZX81

HiRes test which takes a black and white 256x192 image and displays it on a real ZX81. This was done by writing a Java based tool that reads in a bitmap and finds the closest bit pattern matches for that image with the ZX81 ROM.


It then generates an index into the ROM and an array of bytes which represents the HiRes screen 


The source is available on github and the .p file can be downloaded from hereThe source code of the main file (hires.asm) is listed here


The real thing

Is it worth getting hold of a real ZX81 ?


Getting as close as you can

Firing up ZX81 programs on your laptop


The how and the why

Toolkits for developing HiRes applications on a real ZX81

ZX81 HiRes

The fun stuff

Quick Primer on the ins and outs of ZX81 HiRes