Sinclair ZX80 / ZX81 / Z88 Forums

An error code of "V" indicates a vertical plot parameter is out of range, greater than 191.

Likewise an error code "H" indicates a horizontal plot parameter is out of range.

Regards;

Greg

Some info about the QS HRG board can be found here... http://zx81.ordi5.free.fr/qshrg/ The ROM image is available from there. XavSnap's emulator emulates this board very nicely. http://zx81.vb81.free.fr/ Here's some demos and programs for the Quicksilva HRG. Also includes the "Kweeky" application to...

Thanks, that worked.

FYI, anyone using the ZXMore version, you have to change to UDG mode in the tools options before loading it.

Regards;

Greg

The ZXMore version doesn't work because the file "ZXM-data.bin" is missing from the archive.

Regards;

Greg

The sz81 is a nice emulator. If you haven't checked it out recently you might want to here... https://weggetjes.nl/sz81/ Besides the standard ZX81 (sz81), it now has support for Chroma, ZXPand (sz81p) and ZX81NU (sz81n), I don't know what sz81m does. It's AY emulation is also very good. Is there a m...

A simple "Asteroids" game

See enclosed text for info.

Enjoy;

Greg

The author claims over 8000 decimal places in 16K. Presumably more with extended RAM.

Regards;

Greg

From "Syntax" magazine

Here's Frank O'Hara's explanation from "Syntax"