Re: 486 board issues

Posted on 2022-11-30, 17:33

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is your CPU a SV8B or a (N)V8T ? What BIOS do you use? AMI or Award? I think it's a SV8B, because it's and "AM486DX4-S" Regarding the BIOS it's an Award BIOS on a UV-EPROM chip. If the BIOS reports the processor as AM486DX4-S, it is most likely an SV8B. The "-S" indicates SMM (system management …

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Re: Two MIDI modules for two computers

Posted on 2022-11-28, 18:13

by

by AndalusianRG

in Marvin \ Sound

in Marvin \ Sound

Apologies for not reading the whole thread, but I have a couple minutes to post something that worked for me. First off, daisy chaining is by far the easiest way to start the process and I can't really think of any obvious downsides to this unless one of your devices doesn't have a "THRU" …

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Re: 486 board issues

Posted on 2022-11-26, 23:12

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is your CPU a SV8B or a (N)V8T ? What BIOS do you use? AMI or Award? I think it's a SV8B, because it's and "AM486DX4-S" Regarding the BIOS it's an Award BIOS on a UV-EPROM chip. If the BIOS reports the processor as AM486DX4-S, it is most likely an SV8B. The "-S" indicates SMM (system management …

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Re: 486 board issues

Posted on 2022-11-26, 19:50

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is your CPU a SV8B or a (N)V8T ? What BIOS do you use? AMI or Award? I think it's a SV8B, because it's and "AM486DX4-S" Regarding the BIOS it's an Award BIOS on a UV-EPROM chip. If the BIOS reports the processor as AM486DX4-S, it is most likely an SV8B. The "-S" indicates SMM (system management …

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Re: 486 board issues

Posted on 2022-11-26, 18:39

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Disruptor wrote on 2022-11-26, 18:14: Is your CPU a SV8B or a (N)V8T ? What BIOS do you use? AMI or Award? I think it's a SV8B, because it's and "AM486DX4-S" Regarding the BIOS it's an Award BIOS on a UV-EPROM chip.

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Re: 486 board issues

Posted on 2022-11-26, 16:01

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It turns out that booting from MS-DOS I can't run most of .exe files from a floppy, but booting from a bootdisk I can run/copy some or most of them 🤔

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486 board issues

Posted on 2022-11-26, 13:57

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi everyone! I've recently got an AMD 486-DX4 100, on a Biostar MB433UUD-A Rev 3 motherboard. It hasn't been maintained for a long time, but for the price that I paid, I can't really complain 😅 It has a faulty ODIN RTC Chip, and it's having more and more issues. - Floppy reading issues (Sector not …

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Re: Two MIDI modules for two computers

Posted on 2022-11-26, 13:48

by

by AndalusianRG

in Marvin \ Sound

in Marvin \ Sound

Thanks everyone for your advice!! I'll see what I'd do.

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Re: Two MIDI modules for two computers

Posted on 2022-11-21, 12:20

by

by AndalusianRG

in Marvin \ Sound

in Marvin \ Sound

MIDI patchbays are basically the only options with multiple inputs. If you don't mind full rack size, old ones like Roland A880 are cheap on yahoo auctions Japan. If you want half-rack, Edirol UM550 is wonderful, but not cheap. Yeah, but both options are far from my limited budget, unfortunately 😅 …

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Re: Two MIDI modules for two computers

Posted on 2022-11-21, 12:19

by

by AndalusianRG

in Marvin \ Sound

in Marvin \ Sound

The cheapest and fastest is likely to just be having MIDI cables connected to both computers and then just plugging in a module you want to use. Unless you are building a MIDI rack there's no reason to go with something complex and expensive involving MIDI input selectors. Nope, I'm not thinking …

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Two MIDI modules for two computers

Posted on 2022-11-20, 21:53

by

by AndalusianRG

in Marvin \ Sound

in Marvin \ Sound

Hi everyone! I've read a lot about this topic in this forum, but I don't get it at all so I can have my way. I own an MT32-Pi and one Roland SC-7, and I'd like to connect both devices to two computers, trying not to daisy-chaining. Which is the fastest/cheapest way?? Thank you very much!

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Re: Shaking image

Posted on 2022-04-11, 22:43

by

by AndalusianRG

in Marvin \ Video

in Marvin \ Video

pentiumspeed wrote on 2022-04-11, 19:26: Bouncing vertically image means the vertical sweep circuit is starting to break especially solder joints breaking and capacitors. Cheers, Yeah, it could be that too. Thank you!

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Re: Shaking image

Posted on 2022-04-11, 22:43

by

by AndalusianRG

in Marvin \ Video

in Marvin \ Video

shit movie, your hand is shaking more than the picture, didnt capture whole screen due to bad phone orientation, and you made it a short so cant even rewind :/ from what I can (hardly due to above) tell its not shaking, vertical oscillator failing to lock? https://www.repairfaq.org/sam/monfaq.htm# …

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Shaking image

Posted on 2022-04-11, 16:44

by

by AndalusianRG

in Marvin \ Video

in Marvin \ Video

Something strange is happening to my CRT screen😅 I wanted to use it again after being unused for a long time, but the image is shaking all the time. I've tried using different cables, connecting it to different power sources, but it doesn't seem to work. Maybe there's nothing I can do about it. Here …

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Re: Issue with CF card

Posted on 2022-03-23, 12:35

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Run diskpart as administrator and use the clean all command. That should wipe out all the partitions and give you a fresh start. When I runned Diskpart and looked for the disk attributes, the "Read-only mode" didn't appear as active. I don't know if I messed up something inside the disk functioning …

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Issue with CF card

Posted on 2022-03-23, 11:40

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi everyone! I'm having an issue with a CF card that I've recently bought, and I don't know how to fix it 😅 When I first formatted it, I made four FAT16 partitions, and I could write on them on my Win10 PC, using a card reader. Later on, I don't how I did, but I made the card read-only. After …

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Re: Amstrad 286 wrong CPU speed

Posted on 2021-10-03, 13:20

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What speed are utilities like checkit, norton sysinfo, landmark speed test, ... reporting the cpu to be running at at the moment? I definitely should try some of those utilities. Maybe it's running at 16MHz despite that the BIOS sets it at 12. Considering the setup program you are using was for a …

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Re: Amstrad 286 wrong CPU speed

Posted on 2021-10-03, 10:18

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

weedeewee wrote on 2021-10-03, 10:00: What speed are utilities like checkit, norton sysinfo, landmark speed test, ... reporting the cpu to be running at at the moment? I definitely should try some of those utilities. Maybe it's running at 16MHz despite that the BIOS sets it at 12.

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Re: Amstrad 286 wrong CPU speed

Posted on 2021-10-03, 09:35

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

CTRL+ALT+S doesn't work? It doesn't, for no reason. OK there's something weird going on here, the 3xxx series can access the BIOS even by pressing DEL at the startup, you don't need a setup disk for it and that's the reason you cannot find any mention of one anywhere. Have you checked the PC inside …

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Re: Amstrad 286 wrong CPU speed

Posted on 2021-10-03, 09:04

by

by AndalusianRG

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

CTRL+ALT+S doesn't work? It doesn't, for no reason. OK there's something weird going on here, the 3xxx series can access the BIOS even by pressing DEL at the startup, you don't need a setup disk for it and that's the reason you cannot find any mention of one anywhere. Have you checked the PC inside …

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