Gigatron Hackers

What is the difference between the 32k and 64k version?

Only allocation for code.
In 32K code is allocated in first 32kB, in 64K above 32kB. I did my first test on emulator with 64kB and it was easer for me.
Data for graphics is allocated in the same palce.

This is great idea. Thanks for this tip. I must implemented to my compiler.

"CALL vAC" has own opcode? Or it is notation shortening?

Hello :) This is my first game for Gigatron. It is a port 2048 game by Gabriele Cirulli. Is very simple, you must collect 2048 tile. No score this time. http://blabla.ppa.pl/ftp/usr/Phibrizzo/gigatron/2048/2048gt.jpg Arrow key - move the tiles START - retstart game Is avaible two version: http://bla...

Thanks. Last question: if i use BRA then i must decement address -2 too or not? I created my own vCPU compiler for Amiga like systems and it is my first program for Gigatron. http://blabla.ppa.pl/ftp/usr/Phibrizzo/gt1/filler.gt1 Please don't laugh. Little compilator = litte program (on the start, ne...

I have next question, this time about Bcc instruction.

How does it work?
Example:
BNE xx - mean if(vAC != 0) goto vPC&0xFFxx (like BRA) or goto (vPC&0xFFxx)-2 ?

Thanks. Now all is clear.

Second question: can vCPU code cross two pages? I mean situation like that (example):

cfff: INC $80
d001: <another instruction>

Hello :) I read the text about the gt1 file format from: https://github.com/kervinck/gigatron-rom/blob/master/Docs/GT1-files.txt and have one question. Here is written: "In essence, the file format is a list of n>0 segments of 1 to 256 bytes each." if the "segmentSize" = 0 then i...

Now i am working on little dev system. It looks like this at the moment: http://blabla.ppa.pl/ftp/usr/Phibrizzo/gtdev1.png http://blabla.ppa.pl/ftp/usr/Phibrizzo/gtdev2.png http://blabla.ppa.pl/ftp/usr/Phibrizzo/gtdev1.png http://blabla.ppa.pl/ftp/usr/Phibrizzo/gtdev2.png I have one question. I woul...

Thanks a lot for this all explonation. To solve the coding problem, I did two things: 1. Wrote simple program in BASIC: 10 print peek(15) 20 goto 10 and read all needed codes. for cursors i used: right - 254 left - 253 down - 251 up - 247 It work correctly too. 2. Added to the emulator switch for ch...