Search found 152 matches

by bmwtcu
06 Nov 2024, 09:32
Forum: Hardware and software hacking
Topic: sdcard and plugging reloaded
Replies: 2
Views: 86

Re: sdcard and plugging reloaded

Welcome to the forum! As you have figured out, the loader is different from the SD Card Browser. The loader uses the serial port of the Arduino to transfer a gt1 from a PC, and the SD Card Browser uses a similar mechanism to load the gt1 from an SD Card FAT partition, and is what it sounds like you'...
by bmwtcu
23 Oct 2024, 21:48
Forum: Hardware and software hacking
Topic: Another 3D printed case for the Gigatron TTL
Replies: 5
Views: 446

Re: Another 3D printed case for the Gigatron TTL

Nice work! Just curious if the case can be mounted on the stand in either orientation. I'd prefer to have my Pluggy Reloaded at a lower CG and the USB cable up top. Yes, I think so. The stand carries no screws or anything. You just push one piece into the other. What I don't know is if the Pluggy R...
by bmwtcu
18 Oct 2024, 09:26
Forum: Hardware and software hacking
Topic: Another 3D printed case for the Gigatron TTL
Replies: 5
Views: 446

Re: Another 3D printed case for the Gigatron TTL

Nice work! Just curious if the case can be mounted on the stand in either orientation. I'd prefer to have my Pluggy Reloaded at a lower CG and the USB cable up top.
by bmwtcu
12 Jul 2024, 23:54
Forum: Hardware and software hacking
Topic: Another FPGA Gigatron implementation
Replies: 6
Views: 5380

Re: Another FPGA Gigatron implementation

I didn't even know they used diodes. The way I work out the resistor values to use is to write a series of equations based on the Thevenin equivalent circuit with the 75ohm load and solve for the resistor values needed to achieve the target voltages. I'd have to go dig up my circuit analysis textboo...
by bmwtcu
10 Jul 2024, 07:28
Forum: Hardware and software hacking
Topic: Another FPGA Gigatron implementation
Replies: 6
Views: 5380

Re: Another FPGA Gigatron implementation

I'm also leaning towards the level shifter messing with the VGA timing or levels. I question what that RC circuit he's introduced on the VDDA rail would do to output. A scope capture of the SYNC pulses comparing the input and output levels would be instructive. TBH I really don't have a lot of exper...
by bmwtcu
28 Jun 2024, 06:16
Forum: Hardware and software hacking
Topic: Another FPGA Gigatron implementation
Replies: 6
Views: 5380

Re: Another FPGA Gigatron implementation

For some reason, I could not get an image out of the VGA connection. HSYNC/VSYNC work, as the controller also works. I looked at his constraints file and both his and the tang nano 9k schematic. He assigned the outputs to a 1.8V bank of pins and is using a 2.2k/4k voltage divider to get the 3.3V sw...
by bmwtcu
04 Jun 2024, 02:11
Forum: Hardware and software hacking
Topic: online gigatron emulator and CSP errors
Replies: 9
Views: 6664

Re: online gigatron emulator and CSP errors

I think it's under the PhilThomas Contrib folder in the GH repo. Also have you seen this? viewtopic.php?t=459
by bmwtcu
21 Feb 2024, 10:58
Forum: Kit assembly gallery
Topic: Hello! I made a Gigatron
Replies: 4
Views: 15460

Re: Hello! I made a Gigatron

Are you able to tell what IC the knock off controller uses inside? I'm assuming it's hidden under a glob top. If you have the parts handy, it's fairly trivial to build a CD4021B or 74xx165 based NES controller if you want a guarantee of compatibility. https://www.raphnet.net/electronique/arcade_cont...
by bmwtcu
18 Oct 2023, 11:05
Forum: Hardware and software hacking
Topic: Craps (Dice Game)
Replies: 4
Views: 4243

Re: Craps (Dice Game)

casino.png
casino.png (39.43 KiB) Viewed 4205 times
by bmwtcu
18 Oct 2023, 08:08
Forum: Hardware and software hacking
Topic: Craps (Dice Game)
Replies: 4
Views: 4243

Re: Craps (Dice Game)

Nice work Mike! Dude, first Poker then Craps... When are Slots, Roulette and Blackjack going to be released? I'll get started working on the Gigatron Casino setup. Congrats again!