Search found 63 matches

by bmwtcu
06 Nov 2021, 00:26
Forum: Support
Topic: Controller issues
Replies: 3
Views: 188

Re: Controller issues

It's fairly trivial to build a CD4021B or 74LS165 based controller if you want a guarantee of compatibility.
by bmwtcu
19 Oct 2021, 12:18
Forum: Hardware and software hacking
Topic: Gigatron OS - Some progress and a (solved) hardware mystery.
Replies: 23
Views: 5129

Re: Gigatron OS - Some progress and a hardware mystery.

at67 wrote: 19 Oct 2021, 06:57 For example the BabelFish save mechanism modulates the length of VSync to output one bit per vertical sync which some monitors don't appreciate at all.
That was exactly what I was thinking of when I saw it.
by bmwtcu
18 Oct 2021, 23:47
Forum: Hardware and software hacking
Topic: Gigatron OS - Some progress and a (solved) hardware mystery.
Replies: 23
Views: 5129

Re: Gigatron OS - Some progress and a hardware mystery.

Is the OSD message popping up at 36s indicative of loss of vsync? I don't suppose you have an oscilloscope you can monitor vsync with? Have you also tried different monitor and different VGA cable? You don't want to know how many times a flaky cable has been the root cause of my woes.
by bmwtcu
17 Oct 2021, 15:38
Forum: Hardware and software hacking
Topic: New vCPU instructions 2.0
Replies: 95
Views: 24201

Re: New vCPU instructions 2.0

Nice! Looking forward to it!
by bmwtcu
16 Oct 2021, 11:50
Forum: Hardware and software hacking
Topic: Pluggy Reloaded
Replies: 148
Views: 68142

Re: Pluggy Reloaded

That would be pretty cool! I'm assuming you would be using stm32duino and just port the existing Arduino code for the bulk of the interfaces? I suspect it's simpler from a porting standpoint to start with PS2 with appropriate level shift. I think even the lowest cost F030 (no USB) would be able to h...
by bmwtcu
03 Sep 2021, 17:12
Forum: Hardware and software hacking
Topic: Pluggy Reloaded
Replies: 148
Views: 68142

Re: Pluggy Reloaded

Hi, yes, I have enough parts for a few more kits. It's probably easiest to just DM me on the Gigatron Discord at https://discord.com/invite/XywGzy5K88 but I will try sending you a DM here as well.
by bmwtcu
28 Aug 2021, 10:00
Forum: Kit assembly gallery
Topic: Gigatron in Shepparton Australia and detailed build info
Replies: 6
Views: 1263

Re: Gigatron in Shepparton Australia and detailed build info

Neat in-line BabelFish hack! I'm going to have to try an in-line Pluggy Reloaded now:P
by bmwtcu
28 Aug 2021, 09:37
Forum: Hardware and software hacking
Topic: Video Repeater
Replies: 33
Views: 10981

Re: Video Repeater

Hans, that was Marcel's youtube channel, which explains why you haven't heard back. Not sure what you're specifically looking for but he went over it in some detail in the RAM Expander log https://hackaday.io/project/164176-gigatron-io-and-ram-expander . I'd imagine Leon would be familiar with the c...
by bmwtcu
26 Aug 2021, 20:28
Forum: Hardware and software hacking
Topic: whole board with 74LS
Replies: 7
Views: 1655

Re: whole board with 74LS

Did you use a 74LS377 or 74HCT377 for the output register? I believe you need different video DAC resistors per the schematic. The 750/1500 ohm values are meant for HCT