Search found 54 matches

by denjhang
24 Jun 2023, 12:20
Forum: Kit assembly gallery
Topic: German Gigatron TTL is alive
Replies: 4
Views: 1791

Re: German Gigatron TTL is alive

Your Gigatron looks great, well done! Thank you! <3 The enclosure is also finished now. However,... I am thinking about a redesign. I only have an Anycubic i3 Mega with a bed size of like 210x210, so I had to split the parts. A couple of months ago, I 3D printed a mechanically fully working grand p...
by denjhang
19 Dec 2022, 12:46
Forum: Hardware and software hacking
Topic: ROMvX0
Replies: 21
Views: 4368

Re: ROMvX0

Fantastic, thanks for your work. I wanted to test it right away.
by denjhang
18 Dec 2022, 10:02
Forum: Kit assembly gallery
Topic: Acrylic case for Gigatron
Replies: 1
Views: 1836

Acrylic case for Gigatron

https://i.ibb.co/9Wkxh8y/IB-5-P2-M-V2-K7-Y8-N-K7-S.jpg https://i.ibb.co/GMWY128/GSWJ-9-F-G-U5-CH3-VAQ6-4-K.jpg https://i.ibb.co/cYWRPBG/E92-F3-0-FPVC192-9-NZ8-U.jpg https://i.ibb.co/PcBN7nz/G3-WAJ-NHL-W-JD3-3-S97-C.jpg It looks great. This acrylic case was designed and cut by my friend for me. In M...
by denjhang
22 Oct 2022, 08:09
Forum: Hardware and software hacking
Topic: Gigatron Soundcard
Replies: 4
Views: 1240

Re: Gigatron Soundcard

I recommend using a crystal with a frequency of 3.57mhz or lower, because for the SN76489, a lower crystal frequency allows a lower tone. For example, the lowest sound of SN76489 at 3.57mhz is A2. Since I have developed many MegaMods (vintage Yamaha FM synth music IC modules) before, I can even laun...
by denjhang
01 May 2022, 13:13
Forum: Hardware and software hacking
Topic: mml2vgm will soon support Gigatron
Replies: 0
Views: 3143

mml2vgm will soon support Gigatron

First of all thanks to lb3361 and at67 for their invaluable advice on my Gigatron music engine to get this off to a good start. Recently I asked kuma4649 to help me realize an idea of mine to write music for gigatron using mml. https://github.com/kuma4649/mml2vgm/issues/130 https://twitter.com/kumak...
by denjhang
24 Mar 2022, 15:51
Forum: Hardware and software hacking
Topic: Seeking RAM for upgrade (US)
Replies: 9
Views: 1878

Re: Seeking RAM for upgrade (US)

taobao.com has any chips I need, they are cheap and easy to get (of course there are many fakes). But apparently these chips are shipped from China.
by denjhang
21 Mar 2022, 17:52
Forum: Hardware and software hacking
Topic: Explore the Gigatron music engine, using GLCC
Replies: 22
Views: 3318

Re: Explore the Gigatron music engine, using GLCC

After the modification, my pitch bend calculation formula is more accurate. (There seems to be some glitches in the previous ones) struct Note *play_note(struct Note *note, int stepCount){ while (stepCount == note->start_step) { channel_t *chan = &channel(note->ch); int off = note->noteoffset * ...
by denjhang
21 Mar 2022, 17:01
Forum: Hardware and software hacking
Topic: Explore the Gigatron music engine, using GLCC
Replies: 22
Views: 3318

Re: Explore the Gigatron music engine, using GLCC

I want to make a vibrato-like effect, which requires the gigatron to emit audio frequencies that don't exist in the ROM's note table. These frequency values may lie between two adjacent pitches in the note table. So I made some small changes to store relative pitch changes in my note array. The inc...
by denjhang
21 Mar 2022, 09:47
Forum: Hardware and software hacking
Topic: Make music with gtmidi
Replies: 1
Views: 952

Make music with gtmidi

Today I learned how to use gtmidi, of course this is a direct result of successfully compiling the latest gtemu in recent days. (I can't play gtmid directly if using an older version of gtemu) So I found that gtmid does have some areas to improve. 1. No pitch bend and vibrato (probably miditones hav...
by denjhang
21 Mar 2022, 01:58
Forum: Hardware and software hacking
Topic: LCC for the Gigatron. Take two.
Replies: 106
Views: 45111

Re: LCC for the Gigatron. Take two.

Please explain what you mean by "doesn't have the correct functionality" and "problematic in every way". Also try the precompiled version from https://forum.gigatron.io/viewtopic.php?t=313&start=20#p2484 Make sure to read the instructions. The precompiled version is fine, bu...