Search found 41 matches
- 17 Jan 2022, 19:36
- Forum: Hardware and software hacking
- Topic: Gigatron 512k and more
- Replies: 36
- Views: 15946
Re: Gigatron 512k and more
Great development! Even a resolution of about 256 x 240 would enable us to mimic some Arcade classics like Moon Patrol, Frogger etc…
- 02 Jan 2022, 16:53
- Forum: Hardware and software hacking
- Topic: 6Bit audio:
- Replies: 33
- Views: 21249
Devrom patch
I wanted to keep the standard behavior of the blinkenlights and the normal audio output. Therefore I didn´t change the xoutMask but forwarded the value of the sound sample variable directly to the expansion module. However, my new audio output currently works exclusively for display mode 3 due to sp...
- 31 Dec 2021, 15:40
- Forum: Hardware and software hacking
- Topic: 6Bit audio:
- Replies: 33
- Views: 21249
Re: 6Bit audio:
Thanks to the Audio Testboard from Hans61 ( https://github.com/hans61/PCB/tree/main/8Bit-audio-v2 ) and lb3361´s new RAM and IO expansion board v7 ( https://github.com/lb3361/gigatron-lb/tree/main/extension-retro ) I was able to assemble and test the 8 bit audio solution for the Gigatron. Playing mi...
- 16 Nov 2021, 07:37
- Forum: Hardware and software hacking
- Topic: 6Bit audio:
- Replies: 33
- Views: 21249
Re: 6Bit audio:
This is a breadboard-tested solution for the 8 bit audio. The 7524 DAC is operated in “voltage mode”, i.e. OUT1 is connected to a fixed voltage (5V) and VREF is connected to a high impedance amplifier input. This is an allowed wiring according to the data sheet and some applications I found elsewher...
- 22 Oct 2021, 06:45
- Forum: Hardware and software hacking
- Topic: Gigatron OS - Some progress and a (solved) hardware mystery.
- Replies: 23
- Views: 16193
Re: Gigatron OS - Some progress and a (solved) hardware mystery.
The new ROM works great with your GAL based Expansion & IO board ! Is it possible to modify the contents of the vhd file ?
- 16 Oct 2021, 06:58
- Forum: Hardware and software hacking
- Topic: 6Bit audio:
- Replies: 33
- Views: 21249
Re: 6Bit audio:
Maybe something like this for the amplification / low-pass filtering. Rin = 20 kOhm, C2 = 1nF, Rg + Rf = Potentiometer 100 kOhm?
- 14 Oct 2021, 14:38
- Forum: Hardware and software hacking
- Topic: Video Repeater
- Replies: 35
- Views: 27200
Re: Video Repeater
Great development! Maybe one could even use two extra LEDs connected to the MCP23S17 outputs for indicating the current Mode 0 - 3 ? Theoretically it should be possible to safe one gate by replacing the 7400 by a 7402. One could connect the enable input of the 74574 to the MCP23S17 GPB7 and the U5/2...
- 25 Aug 2021, 06:08
- Forum: Hardware and software hacking
- Topic: LCC for the Gigatron. Take two.
- Replies: 106
- Views: 49683
Re: LCC for the Gigatron. Take two.
Changing back to E as a variable name now also works fine on my side . Thank you for the clarification!
- 23 Aug 2021, 06:47
- Forum: Hardware and software hacking
- Topic: LCC for the Gigatron. Take two.
- Replies: 106
- Views: 49683
Re: LCC for the Gigatron. Take two.
Under cygwin>env i found COMSPEC=C:\windows\system32\cmd.exe . Using your latest approach I again got the "No rule to make target"-error. However, everything works fine when changing the main makefile to ifdef COMSPEC EX=.exe else EX= endif replacing E= to EX= and ${E} to ${EX} in this and...
- 19 Aug 2021, 11:24
- Forum: Hardware and software hacking
- Topic: LCC for the Gigatron. Take two.
- Replies: 106
- Views: 49683
Re: LCC for the Gigatron. Take two.
This is my pull request for the Cygwin build: https://github.com/lb3361/gigatron-lcc/pulls .
It is also sufficient to change the ${B}rcc entries in these makefiles to ${B}rcc.exe without an additional rule !
Maybe the rule just changes the way how a missing extension is treated under Cygwin...
It is also sufficient to change the ${B}rcc entries in these makefiles to ${B}rcc.exe without an additional rule !
Maybe the rule just changes the way how a missing extension is treated under Cygwin...