Sinclair ZX80 / ZX81 / Z88 Forums

the wrx driver relies on ROM routines, it could be that something is different on the improved ROM. @Paul, I will provide a build with and without the NOP. Oddly it was only DSTAR crashing, and only in full screen mode. The BREAK feature is rather subtle, you probably can't experiment it on the exam...

While compiling test programs I thought a sampler archive was a nice thing to have

EDIT: 2 more teasers I got having fun during the tests.

While testing the new driver I noticed that DSTAR crashes in 192 rows mode unless I add at least one NOP instruction.
I'm not sure whether the crash is caused by a memory alignment problem or timing/sync issues, other programs run smoothly on EO.

I'm also wondering what the 128 char mode is.

Thank you. Could you test both the programs? They seem identical but one of the two includes a break keys detection

Yet another prototype. Am I getting closer?

Ok, I'm trying to merge in the Paul's code, but honestly I'm doing it mechanically, replacing the existing code portions with the new ones. I haven't identified the code changes permitting the better control of the picture sync, and the 64 rows mode is temporairly lost (on my prototype) but it is so...

I see. I will try to merge your code, but as you probably saw the z88dk driver is rather different.

Some more sample programs

Some of them required a manual build of lib3d.lib altered with the -IXIY trick, yet another todo for the z88dk project

The resulting programs after my crappy fix: could anybody see if it fixes the problem ? I could have introduced the problem trying to reduce the code size (e.g. heavily relying on ROM calls) because changing the way to test the BREAK condition is apparently enough to solve the problem. The code size...