I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-16, 07:45

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello everyone. A friend of mine out of state needed some work done on their 486 machine that was having problems. Turns out the cache chips had gone bad and it was a simple fix. When he sent the motherboard he also sent a MediaVision Pro Audio Spectrum 16 sound card to let me try it out because I …

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Re: Identifying specific RAM ICs for Pine PT 524/8G VLB card

Posted on 2023-03-15, 19:25

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for the information and the reply. I appreciate it. I will get on that and I will report back if it increases the memory transfer speed? I don't know if this card has bank interleaving, or what that term is.

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Identifying specific RAM ICs for Pine PT 524/8G VLB card

Posted on 2023-03-15, 17:41

by

by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello everyone. My apologies to bother again, but I picked up a CL-GD5428 VLB card off of eBay for a build of a computer that I plan to give away on my retro streams online and it's the Pine PT 524/8G video card with the 28 variant chip. It has one Megabyte of ram soldered to the board which is …

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Re: HardMPU, anyone?

Posted on 2023-02-26, 19:53

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by nathanieltolbert

in Marvin \ Sound

in Marvin \ Sound

I'm not 100% certain, but I don't think the HardMPU-WT supports midi in. But I of course could be wrong. I think it was mentioned earlier in the thread whether it does or doesn't though.

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2023-02-26, 19:51

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

None of my 486 motherboards that use 30 pin modules support 16MB modules. Granted most of them are from 1991-93 or so. All off my later 486 boards are PCI and they use 72 pin memory modules instead. Are there specific boards that I can put an eye out for? I would be really interested in using one of …

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2023-02-22, 20:31

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This sounds super exciting! I can't wait to see the numbers when you are done!

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Re: HardMPU, anyone?

Posted on 2023-02-22, 19:31

by

by nathanieltolbert

in Marvin \ Sound

in Marvin \ Sound

I will go through all of the boards I have and note their chipsets. Of the two PCI 486 boards I have that I have tested with they are both SIS496/497 I believe? Socket 7 boards I have tested with are 4 separate PA-2010+ boards. They have the VIA VT82C585VPX and VT82C586A. And they all work. But I …

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Re: HardMPU, anyone?

Posted on 2023-02-21, 19:14

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by nathanieltolbert

in Marvin \ Sound

in Marvin \ Sound

Again that is non-sense. There is no new allocations or something. To make the compatibility to work the VLB i/o board had to be exactly same design as ISA in hardware, irq and addresses as ISA so DOS and windows to work otherwise would require a IDE VLB driver for the VLB IDE chip. If the MPU-IPC …

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2023-01-17, 19:59

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have you tried using UNISOUND to set your volume? It should be able to set it across pretty much all of your sound cards. Not sure if it would make a difference, but it's worth a try - at the very least it's a nice all-in-one sound config utility that works with the majority of DOS sound cards. I …

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Re: HardMPU, anyone?

Posted on 2023-01-17, 00:28

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by nathanieltolbert

in Marvin \ Sound

in Marvin \ Sound

mbarszcz wrote on 2022-12-22, 04:50: I can give you a rundown of how I had mine made and which options I used if you like. I have 3 of them in different PCs and they're all working great. I would love to get a rundown on this. I have never made my own run of PCBs before, and so any tips and …

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2023-01-17, 00:23

by

by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I got some 16mb sticks in the mail. 4 of them They unfortunately don’t seem to be supported. I got parity ones. Could that be it? Or are they simply just not supported? 4mb x 8 it is then? From the information I could find, which was quite scant, it looks like the board supports 256Kx8, 1Mx8 …

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Re: HardMPU, anyone?

Posted on 2022-12-25, 20:23

by

by nathanieltolbert

in Marvin \ Sound

in Marvin \ Sound

I can give you a rundown of how I had mine made and which options I used if you like. I have 3 of them in different PCs and they're all working great. I saw your link to the repository. When I look at the schematics, there's a bunch of different files. Do I submit all of them to the PCB …

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Re: HardMPU, anyone?

Posted on 2022-12-22, 03:38

by

by nathanieltolbert

in Marvin \ Sound

in Marvin \ Sound

I need to build a couple more of these cards. Unfortunately, I haven't ever made my own pcb, and I don't know if I can do it. I wonder if the creator of this project has any more boards available for sale. Maybe they will have time to stop by again sometime and let us know. That board made by …

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2022-11-21, 18:08

by

by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay. Another strange question. This is not something I have had an issue with before, so I am curious if there is a fix. I am using an Aztech Sound Galaxy Pro 16 sound card in this 386, and I have noticed with certain games, that they reset the mixer to basically nothing. I have tried different …

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2022-11-15, 23:00

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Grounding a mounting hole is usually a good thing. Stray standoffs grounding other stuff is a problem I think I did that correctly. The case has only 3 standoff locations. I used screws with nylon washers on those three spots. The rest of the spots use plastic spacers that slot into the grooves in …

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2022-11-15, 14:52

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay I have gotten everything into the case, and have installed a classic Western Digital Caviar 2540 540MB hard drive and the machine works, but I think I don't have it configured properly. I didn't get an IBM PC style computer until the 486, and our first PC was a 486 from Packard Bell, which …

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Re: Young Micro Systems CROSS 486G-VLB no boot but POST Code Beep Error code D3

Posted on 2022-11-07, 18:52

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

were those Apple service centers? :) I meant a local mall cellphone guy sitting somewhere in a corner replacing batteries, cracked screens and resoldering charging ports, that kind of cellphone repair. I wouldn't contact an Apple service center. I want to fix the board, not have it replaced with a …

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Re: Young Micro Systems CROSS 486G-VLB no boot but POST Code Beep Error code D3

Posted on 2022-11-05, 19:50

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

find a local cellphone repair place, they will be able to patch those traces for you I called 4 different cell phone repair places. All but one of them said they wouldn't do it. The fourth place wanted to charge 600 bucks. So that's not feasible for me. Note that I didn't look at other local …

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Re: I got an ASUS K7M 1.04 motherboard recently. Encountering issues

Posted on 2022-11-05, 04:16

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

BIOS indeed might be the source of the problem, perhaps those 3.3V measurements were done incorrectly? That is always a possibility with me. I would hope not, but looking at that one leg you pointed out there is no movement when I use my tweezers on it. It does appear to be solidly connected. I can …

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Re: I got an ASUS K7M 1.04 motherboard recently. Encountering issues

Posted on 2022-11-04, 04:32

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I didn't have time to check the resistances of those parts today, but I did manage to snap a picture. I double checked the original photo and the silkscreen on the board. The caps are installed correctly. I don't see a bridge or short on the back? But my eyes really aren't that good. My soldering …

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