Search found 488 matches

by marcelk
03 Jun 2018, 23:23
Forum: Hardware and software hacking
Topic: Setup the Gigatron loader with Arduino and Python
Replies: 2
Views: 2993

Re: Setup the Gigatron loader with Arduino and Python

Thanks for the write up! These help tremendously in making hacking accessible. I just updated LoaderTest.ino so that fewer edits are required: just select the configuration in the top of the file. I hope I didn't mess up. I'm somewhat puzzled why there is no prompt. Perhaps the Arduino Micro doesn't...
by marcelk
02 Jun 2018, 16:52
Forum: Hardware and software hacking
Topic: BASIC
Replies: 31
Views: 21811

Re: BASIC

A first BASIC can get away with skipping quite a lot of functionality: Floating point Multi-character variable names Arrays Correct precedences for infix expressions String variables or operations (the Hackaday BASIC batch also doesn't do them) Full screen editing (just do with a line editor at the ...
by marcelk
02 Jun 2018, 16:17
Forum: Hardware and software hacking
Topic: Keyboard hookup with minimal means (dream)
Replies: 19
Views: 14984

Re: Keyboard hookup with minimal means (dream)

I agree that two more shift registers is not nice. The one on the board is already a little cheater. After all, software could easily sample the game controller bits during vertical pulse. The 74HC595 is rather complex because it has 16 flip-flops and a tri-state buffer. We're effectively not using ...
by marcelk
31 May 2018, 10:31
Forum: Hardware and software hacking
Topic: Documentation...?
Replies: 1
Views: 2518

Re: Documentation...?

Expanding the Tutorials section on the web site is next up. We welcome any assistance. This forum should help with specific questions.
by marcelk
30 May 2018, 19:34
Forum: Escape Meta Alt Control Shift
Topic: Registration settings updated
Replies: 5
Views: 5089

Registration settings updated

We got some bot spam in the forums recently (now deleted) because the default phpBB setting is that new users are automatically accepted after e-mail verification. We now changed it to admin approval.
by marcelk
29 May 2018, 18:08
Forum: Hardware and software hacking
Topic: MIDI Audio:
Replies: 18
Views: 12854

Re: MIDI Audio:

For demo purposes at the HaD conference I made a ROM file with your MIDI-blasting tetris.gt1 in it: https://marcelk.net/2018-05-26/theloop.2.rom I put Tetris in place of Credits in the menu, and I removed Jupiter to free up ROM space. A hack in SYS_Exec_88 is also needed to accept the GT1 file, beca...
by marcelk
29 May 2018, 17:21
Forum: Hardware and software hacking
Topic: Keyboard hookup with minimal means (dream)
Replies: 19
Views: 14984

Keyboard hookup with minimal means (dream)

Nice and clear. As an inverter we can repurpose one from the clock: U1E is not really needed. In the next series its output is not even connected any longer to get a somewhat cleaner CLK1 signal. Furthermore, the DB9 allows feedthrough of more signals than are currently connected. We can also consid...
by marcelk
26 May 2018, 16:29
Forum: Escape Meta Alt Control Shift
Topic: 2018 Hackaday Belgrade presentation
Replies: 3
Views: 4704

Re: 2018 Hackaday Belgrade presentation

We found a Gigatron Service Center in Belgrade! I could make a snapshot while my taxi to the hotel was waiting for a traffic light and I spotted this...

IMG_3357.jpg
IMG_3357.jpg (249.54 KiB) Viewed 4694 times
by marcelk
25 May 2018, 11:51
Forum: Hardware and software hacking
Topic: MIDI Audio:
Replies: 18
Views: 12854

Re: MIDI Audio:

There could be more to it than just aliasing. The reduction from 8 bits accumulated to 4 bits out induces a discretisation error. It might be better to carry over the remainder of this truncation to the next sample, instead of resetting it. Well, all speculation and much tweaking potential.