Gigatron Hackers

Interesting.. you found an error in my slides, after >5 years :-) The slides are indeed incorrect. The correct information is on GitHub: https://github.com/kervinck/gigatron-rom/blob/master/Docs/Native-instructions.pdf . In my slide, the instruction matches this order: IR1 IR0 IR4 IR3 IR2 IR7 IR6 I...

Hello. I'm studying gigatron nowadays. Engilsh is not my mother tongue, so my words can be weird. I ask for you understanding. :) 1.jpg In this picture, EPROM outputs a 16-bit digit. High address(left) one byte is instruction, and the low address(right) one byte is operand. I brought a machine code ...

Hello everyone # ld([Y,Xpp], OUT) ld [y,x++],out What does 'x++' mean? If there's a code like that, what is happening? As I think, 1. RAM [YYYYYYYYXXXXXXXX] is loaded to the OUT register 2. X register incremented is it right? For example, if each register value and the codes are like that; X: 0000 0...

Hello, I'm studying ROM files and there's a question about that. I attached a picture. It may be useful to understand my question. The assembly instruction 'jmp' can do the 'far jump' action, so if 'jmp(Y,'vBlankStart')' is executed, we jump to 'vBlankStart'. Then can 'SYS_Reset_36' be executed? Eve...