Gigatron Hackers

That's pretty awesome Walter, I have boxes full of old TTL boards and chips, I'll see if I can find anything older.

Amazing how much you squeezed out of the Gigatron! I spent more time than I care to admit playing this today. :) I did notice an anomaly playing with keyboard that I'm trying to make sense of. If you fire using the enter key, the player shifts a little to the right with each shot, which doesn't hap...

I’m sorry for this long post, but I hope that some of you can reach the end of it appreciating the synthesis I did of more than one year of scattered thinking of the various solutions… There is a lot to digest here and without fully simulating/implementing some of these ideas I can only provide som...

Just to add to Norgate's reply, here is a snapshot of the settings that you need to setup, (Marcel originally provided this pic).

Parts list is here:
viewtopic.php?f=4&t=169&start=20#p1080

Some big online US component distributors are:
https://www.mouser.com/
https://www.chip1stop.com/USA/en
https://www.digikey.com/

Have you tried multiple PS2 keyboards? Not all of them are 100% compatible, especially USB keyboards with internal/external PS2 adapters. https://forum.gigatron.io/viewtopic.php?f=4&t=223 https://forum.gigatron.io/viewtopic.php?f=4&t=95 https://forum.gigatron.io/viewtopic.php?f=4&t=62 https://forum....

Be careful, the Raspberry's 3.3 V inputs are not really 5 V tolerant. The 68R resistors in series with SER_PULSE and SER_LATCH provide some current limitation but they are no level shifters. YMMV. Big oof, I assumed from xbx's original post that the GPIO inputs were either 5v tolerant or 5v inputs ...

Be careful with using values other than 6.25MHz for the Gigatron's standard firmware, as Marcel took into account the discrepancy between the VGA standard and the Gigatron. A lot of monitors may work fine with crystals slightly out of spec, others may require slight offset/scanning adjustments and o...

Sound always adds that extra dimension, it's a really fun game and I like the 5min time limit; it really forces you to try and chain instead of just moseying along.

I've also replaced the old version with this new version in the GT1 repo.

One question before I start down this path... Is this the easiest/best way to build a loader? I'm trying my best to sift through all the great posts on here and I've seen mention of a SD card loaded?? And also an updated ROM that's in beta. (BTW is anyone here able to burn one of these ROMs for me....