Search found 14 matches

by Hans61
14 May 2021, 21:03
Forum: Kit assembly gallery
Topic: I have some problems with my gigatron.
Replies: 9
Views: 90

Re: I have some problems with my gigatron.

If the crystal is not 6.25mhz there will probably be no picture. The function can then only check with the flashing Led's. I have already built a few Gigatrons without problems. Also one with a socketed crystal to play a bit. My Gigatron does not run with 8mhz anymore. I would try a crystal smaller ...
by Hans61
02 May 2021, 17:56
Forum: Hardware and software hacking
Topic: Possible ways of speeding up the Gigatron
Replies: 17
Views: 793

Re: Possible ways of speeding up the Gigatron

I don't have a FIFO yet. I just ordered some and hope they arrive within the next week. @axelb thanks for the hint. I wanted/will test the circuit first as it is. I think it's already good as it is, since it gives us the maximum processing power of the Gigatron without graphics loss. To decouple the...
by Hans61
25 Apr 2021, 15:17
Forum: Hardware and software hacking
Topic: Possible ways of speeding up the Gigatron
Replies: 17
Views: 793

Re: Possible ways of speeding up the Gigatron

Very nice work, thank you. I think I would like to replicate it. I think the PCB clashes with the RAM expander. Maybe I will make one myself.
by Hans61
23 Apr 2021, 18:23
Forum: Kit assembly gallery
Topic: New Gigatron with 128K expansion. Boots from SD!
Replies: 16
Views: 1634

Re: New Gigatron with 128K expansion. Boots from SD!

I also have a TL866IIplus, I think directly from China. I find the part better with each passing day. I had the extension ready last week, just no time to post. I also have to thank lb3361 for the idea with the GAL/PAL. I didn't have that in focus and didn't know those things existed back in the 80s.
by Hans61
23 Apr 2021, 17:45
Forum: Kit assembly gallery
Topic: New Gigatron with 128K expansion. Boots from SD!
Replies: 16
Views: 1634

Re: New Gigatron with 128K expansion. Boots from SD!

20210423-185242-005-erweiterung-web.jpg 20210423-185227-004-gigatron-mit-erweiterung-web.jpg Thanks for the new 128k expansion. I took the liberty of building it right away. I find it very beautiful. After I was more concerned with the hardware of the Gigatron at the beginning, I want to deal more ...
by Hans61
24 Mar 2021, 16:33
Forum: Kit assembly gallery
Topic: And again a new Gigatron fan
Replies: 11
Views: 1132

Re: And again a new Gigatron fan

Hi Brian, thank you very much for pointing it out. I hadn't noticed it yet. After the design change here: https://forum.gigatron.io/viewtopic.php?f=4&t=64&start=50 I wired the blue wrong. Thereby A6 and A7 are swapped, the signals B0 and B1 are responsible for the RAM above the 32kByte memory. In pr...
by Hans61
21 Mar 2021, 19:14
Forum: Hardware and software hacking
Topic: Sprites
Replies: 6
Views: 676

Re: Sprites

Very good work, an incredible performance, I love it.
by Hans61
14 Mar 2021, 18:20
Forum: Kit assembly gallery
Topic: And again a new Gigatron fan
Replies: 11
Views: 1132

Re: And again a new Gigatron fan

Thanks for this information. The XOR and sprite thing is of course very dependent on the colors and background. I still have a lot to learn about the Gigatron, I've only known it for 3 months. After the hardware, I want to get more involved with programming the Gigatron. I find the emulator from at6...
by Hans61
06 Mar 2021, 11:23
Forum: Kit assembly gallery
Topic: And again a new Gigatron fan
Replies: 11
Views: 1132

Re: And again a new Gigatron fan

What I noticed while building the Gigatron - In ROMv5a Pictures does not work, also not in the emulator - with physical RAM 64k or 128k ROMv4 always shows 64k and ROMv5a always 128k - under Debian 10 I had to remove the space in the Makefile at: minipro -p 'AT27C1024 @DIP40' -w "ROMv4.rom" -y -s to ...