Gigatron Hackers

Nice!!! You should be able to split the PULSE and LATCH pins and use a switch to select between keyboard and controller DATA? I've never tried swapping mid-stream, so not sure if you can get away without a reset for some edge conditions. While I understand the tradeoff you made for the RAM expander ...

Since you only have 16 bits, configure the LA to sample RST_B, PC[11:0], CLK1, PL_B and PH_B. Group the PC[11:0] pins as a single hex value to make it easier to read. The parallel decoder is useful, but you need to compare the lower 12 bits of the PC against PL_B and PH_B. PC9 should not always be h...

https://www.hackster.io/news/google-sky ... e644a9529d
https://www.theregister.com/2022/07/29/ ... r_os_chips
now 90nm!!! There's hope for the SRAM and ROM fitting now.

The goal is to monitor PC[15:0] as a whole and see if it is correctly: 1) resetting 2) loading 3) incrementing by comparing PC[15:0] to the address column of the ROMv5a listing. Doing this will shed light on when you first see a problem and allow you to zoom in on what needs debugging. Remember that...

Schweet! Fixed the FPGA code by adding if(cu_pl_n) to the PC increment. Tested on ROMv3/v4/vX0. (Love those DIP switches!)

Sounds consistent with the two known failures we've been talking about.

https://forum.gigatron.io/viewtopic.php?p=2301#p2301 Hmm... Looks like exactly the same thing. I haven't seen this myself, though I have had other strangeness happen specifically on ROMv3 Pictures when it showed Jupiter. Are Blinkenlights still running? I assume that you already received your Famico...

I've been toying with that idea too. The 8 PIOs offload much of the serial data manipulation from the main dual core M0+. It's crazy when you think about how much processing power you get for $4.

Congrats! I'm curious... what make/model RF modulator?

Answering your PM in this thread. The syntax for using sendFile.py is in the python3 script itself. I found this thread using the search function for "sendFile.py" https://forum.gigatron.io/viewtopic.php?p=3147#p3147 The truth is I only used it one time and haven't looked at it again since...