I have the fast ROM in instance 3, and regular ROM is instance 1.
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube
Many thanks! Please feel free to help yourself to anything useful here: https://github.com/cheveron/open81/tree/Version-2.5
I hope you are well despite the pandemic.
Here is the last X2-ROM variant - let's see, what is changed:
- the Babylonian (or Heron's) square root method (from the SAM Coupe ROM by Andy Wright) shared by aowen is included;
- i tried to solve an old "problem": the flicker free PAUSE;
- good news for Siggi & Joachim: the renewed CLS (is a bit slower but) handles the too long D-Files.
The zip file contains the new ROM image (zx81X2m.rom for zxmore) and its source code, the changed/patched routines in a separate folder, and some test programs.