Search found 651 matches

by at67
06 Jun 2024, 09:22
Forum: Hardware and software hacking
Topic: online gigatron emulator and CSP errors
Replies: 9
Views: 6578

Re: online gigatron emulator and CSP errors

You can't post into someone else's Contrib without their permission, so the only place left is your own.
by at67
14 May 2024, 14:41
Forum: Hardware and software hacking
Topic: Matrix [test]
Replies: 4
Views: 7865

Re: Matrix [test]

This is excellent, especially the second version!
by at67
04 May 2024, 21:51
Forum: Hardware and software hacking
Topic: SYS functions cycles problem
Replies: 2
Views: 5391

Re: SYS functions cycles problem

You've found a couple of issues here: From SYS-functions.txt: Naming ------ The naming convention is: SYS_<CamelCase>[_v<V>]_<N> With <N> the maximum number of clocks or cycles (not ticks!) the function will need, counted from NEXT to NEXT. This duration <N> must be passed to the 'SYS' vCPU instruct...
by at67
01 May 2024, 00:42
Forum: Hardware and software hacking
Topic: About GitHub repositories
Replies: 5
Views: 9625

Re: About GitHub repositories

Welcome to the forums, you sure can!
https://github.com/kervinck/gigatron-rom/pulls
by at67
01 May 2024, 00:41
Forum: Hardware and software hacking
Topic: Shuffle [game]
Replies: 6
Views: 7700

Re: Shuffle [game]

Looks and plays great!
by at67
27 Mar 2024, 07:11
Forum: Hardware and software hacking
Topic: What does 'Xpp' mean?
Replies: 2
Views: 9401

Re: What does 'Xpp' mean?

That's correct Xpp is a post increment of X, the increment happens after the operation
by at67
26 Mar 2024, 17:24
Forum: Hardware and software hacking
Topic: What does each assembly do?
Replies: 3
Views: 8895

Re: What does each assembly do?

Emulator:

Code: Select all

https://github.com/at67/gigatron-rom/tree/master/Contrib/at67
Various HW/SW links:

Code: Select all

https://forum.gigatron.io/viewtopic.php?p=1592#p1592
by at67
26 Mar 2024, 09:12
Forum: Hardware and software hacking
Topic: What does each assembly do?
Replies: 3
Views: 8895

Re: What does each assembly do?

Yes that's correct.

Documentation is here:

Code: Select all

https://gigatron.io/?cat=1
You can also single step through ROM source code in my emulator package and watch exactly how the native instruction works.
by at67
26 Mar 2024, 09:05
Forum: Hardware and software hacking
Topic: ROMv1.asm.py
Replies: 2
Views: 8427

Re: ROMv1.asm.py

It's a SYS function/call, SYS functions are called from vCPU code like this: LDWI 0xFFFF ; 4 pixels STW 0x24 LDWI 0xFFFF STW 0x26 LDWI 0x0800 ; pixel address STW 0x28 LDWI 0x04d4 ; SYS_Draw4_30 STW 0x22 SYS 30 loop BRA loop