Sinclair ZX80 / ZX81 / Z88 Forums

So even with WRX, you can't address at the pixel level in x? Correct. A byte represents a block of 8 horizontal pixels. So if you want to move things horizontally at the pixel level then you either need to define pre-shifted sprites, or shift them in a buffer as and when needed before copying them ...

Only hang up is the the high res motion is only vertical - I can move up and down one pixel at at time (192) but horizontally, it still moves in 8bit chunks (32) col instead of 1bit steps (256). Is this just how they all work The hi-res routine Don is using is pseudo hi-res, similar to that used in...

Here are a few photos I took back in the early 2000s so unfortunately the resolution is not great, but it looks like D0 goes to pin 10 and pin 16 is unused.

Thanks, I'd not seen this before.

Version 1.24 of EightyOne now includes a fix for the bug with the ZX Printer emulation.

A new version of EightyOne (v1.24) has been released that resolves the display issue seen with HiRes Pacman and HiRes Invaders.

I just encountered a very weird behaviour with EightyOne 1.23 in conjunction with the Interface 1/Microdrives Version 1.24 partially addresses this issue. EightyOne holds an array of bytes representing the contents of a microdrive cartridge, including the gaps between header and data blocks. When E...

Version 1.24 of EightyOne is now available:
https://sourceforge.net/projects/eighty ... -emulator/

It addresses a number of bugs.

Is the file for this modified by your self Paul in someway? I have the original book and cannot get the listing to work without crashing and did read somewhere that the listing as printed is in error. I have another of Hartnell's book that has this listing or something similar and that definitely i...

There was also a pause routine published in Personal Computer World magazine February 1981.