Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-06-07, 01:48

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Scope: at work only. I could go back this week. Rev: the board I used and had made is an "early v0.3". You made several changes (but are still labeling it as v0.3 as of right now) after I cloned the project. Here's what circuitmaker detects as differences https://i.imgur.com/YLcxBCh.png And here's a …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-06-05, 21:07

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Unisound gives: No PnP sound card detected CWD-v180 (1997 dos latest): cs4232c.exe reports 'Cannot find Crystal chip' and cwdiag reports 'Fail' on SoundBlaster, MPU401, FM/OPL3 and Windows Sound System. CWD-v250 (1997 w+wavestrm): cwbinit reports 'Cannot find Crystal chip' I've even reflowed ALL my …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-06-05, 16:05

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

I finished the assembly late last night and... It wouldn't display anything. The blue LED on the SOM lit up, I was finding 4.73 V everywhere I tested that should receive it, etc. This morning, I started testing my 2nd SOM, same behavior. I then realized I should make sure the top of the mating SOM …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-06-04, 20:37

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

All finished with the non-J connector underside components. Did this to program the EEPROM: This W feels good so far!

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-27, 14:36

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

I went on and calculated my total costs in the past months for the project. I set out to build 2 units (highlighted below in the chart) to save on costs. Keep in mind these purchases: -SOM from ICOP, pcb mating pins for SOM, Hammond case, CS4237B-KQ audio chip, ps2 split cable, microsd 32 GB, PCBs, …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-26, 15:33

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Do you have a reel of solder wire you are dragging across the legs of the chip? You should be applying flux to the pads and then adding solder to the pads themselves. You then place the chip and do the drag and let the heat melt the solder. You could also use solder paste which melts about as fast …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-26, 14:11

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

I received my Mouser parts AND the pcbs yesterday. With some misplaced bravado, I set out to extract (went well) and ROHS solder (went well) my first 0603 component, C35, around the voltage regulator. I've watched a healthy amount of tutorials about flux, was equipped with it, have some experience …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-24, 19:42

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Oh yeah, about aliexpress eeprom adapters, NAH, I'm definitely not waiting SEVERAL weeks for that stupid part. I'll try to insert wrapped wires on the legs of the eeprom and cross my fingers there's no too much interference and enough current.

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-24, 18:55

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

I tried making my own based upon the datasheet for the sound chip CS4237B, I got to this, occupying about half of the 512 available bytes EDIT - it's wildly different, so don't use this pic as a reference, people! https://i.imgur.com/NqREdkW.png When I freeze frame your video about your PC-104 sound …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-21, 03:38

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

I found the answer for R19. It's a 4.7 kOhm resistor that either pulls down to ground (which is what was used and is labeled R20) or pulls up to 5V (which would be labeled R19). The relevant text in the datasheet is: Mono Input The mono input, MIN, is useful for mixing the output of the "beeper" ( …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-20, 20:32

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Is R9 6.8kOhm as specified in the details of that components in circuit maker, or 4.7kOhm as written on the label on the schematics? This is tied to U2 (the eeprom) so it must not have a super high impact if it's either...right? R10, R19 are not populated (NP), was there a strong motivation to not …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-20, 18:12

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Questions still orbiting in my mind: 1) what do we do with the EEPROM, must it be programmed ourselves, or the SoM just needs one and does its own thing with it? I have the very popular XGEcu TL-866II Plus everyone has, but I don't have adapters for SMT eeproms if I needed to link pins in specific …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-19, 17:34

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Questions still orbiting in my mind: 1) what do we do with the EEPROM, must it be programmed ourselves, or the SoM just needs one and does its own thing with it? I have the very popular XGEcu TL-866II Plus everyone has, but I don't have adapters for SMT eeproms if I needed to link pins in specific …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-05-19, 17:18

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

I've been progressing slowly on recreating this for my own purposes, 2 copies. 1) Have the audio chip ordered and received (x3) 2) Hammond cases hammond 1457j1201 ordered and received (x2) 3) 2x SOM304RDVINE-1 modules ordered from ICOP California offices, including 8x mating connectors (4 for each …

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Re: DOS Zeliard vs Sega Teradrive PC control problem

Posted on 2021-05-02, 02:16

by

by Mu0n

in DOS

in DOS

Apologies for the super necro, but not many places on the net talk about this problem and I'm going through Zeliard these days and I've encountered finicky gamepad detection as well. I've discovered a good routine to make things work. Hardware: IBM Valuepoint DX2/66 Creative SB16 CT-2940 with a …

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Re: Best option for 486DX/2 Roland MT-32 *and* simultaneous joystick

Posted on 2021-04-22, 13:31

by

by Mu0n

in MT-32 General

in MT-32 General

I did use that schematic while completing my solution. I just ditched MIDI in, which I have no plans on using on a retro PC (as I can just do similar with a Roland SC-88ST plugged into my Mac SE/30 with cubase 1.0) and considered for a few moments if a 2nd joystick with 2 buttons was needed, and I …

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Re: Best option for 486DX/2 Roland MT-32 *and* simultaneous joystick

Posted on 2021-04-21, 16:00

by

by Mu0n

in MT-32 General

in MT-32 General

Bought a gameport joystick/MIDI cable splitter from aliexpress, had to redo I documented my solution there.

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-04-15, 13:45

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

The latest version of the design files should have the bodge wire incorporated, but I don't want to release gerbers till I've double checked everything (and possibly added a waveblaster header). If you're desperate to build one now I can generate you some gerbers if you like. I contacted ICOP ( …

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2021-04-14, 18:07

by

by Mu0n

in Marvin \ System Specs

in Marvin \ System Specs

Love the project. Been following your youtube channel since December. I'm thinking of jumping in and replicating my own here, with or without bodge wire (although I understand if you don't want to release your v1 at all). I already ordered a few sounds chip which could serve in other projects as …

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Re: ebay cable, help! DB15 Gameport > MIDI with joystick pass through

Posted on 2021-04-09, 15:11

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by Mu0n

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Muon, I didn't get any further than this as I lacked the know how. I ended up finding a new old stock Creative MIDI joystick splitter cable from a music shop and kind of gave up as serdashop make the DB15MIDI for cheap which is basically the same without the joystick pass through. Thanks for …

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