Gigatron Hackers

Can You check MOVW (opcode $BC) instruction?
Propably it working bad. I chceked on latest dev7.rom of ROM file.

In the file vCPU7.md You wrote:

A third instruction EXCH is useful to atomically read-modify-write.

But now EXCH not exist. Do You removed it?
Now is EXBA instriction.

Why does the MOVIW instruction break the endians rule?

What do you mean by correct batch? Caption of the ic is Atmel 20U tiny85. The panel seems good. I used file from this page: https://github.com/kervinck/gigatron-rom/tree/master/Utils/BabelFish File: https://github.com/kervinck/gigatron-rom/blob/master/Utils/BabelFish/BabelFish.ATtiny85_v1.bin With ...

Hello

Long time ago i did it something like this:



I used plans from McFP archive
It working very well on first plugin. Tested with two differents PS/2 keyboards.

Are You sure your circuits PCB is correct? Or use correct batch for ATtiny?

lb3361 wrote: ↑21 Dec 2024, 22:14 Then I believe you can go even faster.

Yes, You're right. I did it.
Now is very faaast
Backward copy is now only few times exetuting.

Source:
http://www.changeit.ppa.pl/ftp/r_7x0.asm

There should be an opcode NCOPY in ROMvX0 that is slower than SYS_CopyMemory but might have smaller setup times. I wrote it. Alas I do not remember its peak performance. Looking at the code it seems to achieve 8 pixels per scanline, two thirds of the peak speed of SYS_CopyMemory. But when the chunk...

Hello

I apologize, i lied last time.
I have studied the ROMvX0's documentation and i did somethig faster.
I used two sys function: SYS_CopyMemory for forward copy areas and SYS_MemCopyByte for backward.
Now wroking good on the ScreenMode 2 too.

Hello

This is my last word in this mather.
Now is much faster than latest version. I used one SYS function to copy areas.

Hello

Your effect is very spectatular
I tested previous version for dev7 on real hardware but not working. Propably i have too old version of this rom.
I hat to use emulator.
Where can i find latest version of dev7 rom?

Second version woking very well on ROMv6.