Gigatron Hackers

I have tried to format a 128Mb SDcard with guiformat.exe using FAT32 with 512 bytes/sector and does not work (will try later to format a 2GB SDcard with guiformat.exe utility using FAT32 and 512 bytes/sector), maybe 4GB SDcards works because are more faster than 2GB SDcards? I´m searching for a .gt1...

Problem solved! Now after a cold boot pins 21 and 20 of the GAL 2 are at logical 1 and 0 respectively and Gigatron shows 128K I had a tough time trying to get the SDcard work: only work SDcards of 4GB (or more? -don´t have 8GB SDcards-) I have 2GB SDcards and formatting in FAT32 such SDcards in 512 ...

I have removed the GALs and put jumpers, shows 128K, when I put the GALs shows 32K. My problem lies in the GALs, does
the v7b board needs a different programming of GALs 1 and 2? Could you read the GALs 1 and 2 with TL866II programmer
and send the the .jed files?

thanks

My findings: (my Gigatron board always shows 32K instead 128K, used the latest DEV.ROM) My board has a 55ns 128K static RAM (checked good with a tester) and 2 ATF22V10C 7ns GALs (also checked with 15ns GALs), I have programmed the .jed files with both a TL866II and Labtool 48 programmer (without any...

Attached photo of the two gigatron IO boards I have built:

Hello: Sent the gerber (https://github.com/lb3361/gigatron-lb/blob/main/extension-retro/Gerber_PCB-v7.zip) to https://jlcpcb.com/ for manufacture, got the board, built it, programmed GALs ATF22V10C with https://github.com/lb3361/gigatron-lb/blob/main/extension-retro/cupl/GAL1_v7.jed and https://gith...

In files https://github.com/lb3361/gigatron-lcc/ ... e/sieve0.c. sieve1.c and sieve2.c, where is the mincprintf() function?

The file https://github.com/lb3361/gigatron-lcc/ ... e/sieve1.c has a syntax error in line:

printf("\n%d %d/60 seconds", ticks/60, ticks % 60, count);

The third parameter (count) should not be there

The makefile from https://github.com/kervinck/gigatron-ro ... ser_SDCard is needed to build the .h files needed for making the arduino code (both ROM and NOROM), but what about the makefile needed to build the sdcard.rom file to be flashed onto a 27C1024 EPROM?

Was able to build both ROM and NOROM arduino/sdcard.rom files from source, but in building sdcard.rom I have had to use the makefile from romvx0.zip, it is correct the makefile for building sdcard.rom?