Re: I built the AdLib reproduction card

Posted on 2018-04-26, 08:56

by

by root42

in Marvin \ Sound

in Marvin \ Sound

I also have the first bracket now done. I use the Keystone brackets that are available at several vendors. A colleague and friend of mine has a good stationary drill which we used to drill the two holes and used a countersink to make it nicer. It's a bit of work, but fits really well and looks good. …

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Re: CF-IDE not working

Posted on 2018-04-26, 07:32

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's just a guess, but maybe it works if you try 997 cyl / 15 heads / 32 sectors. Old BIOSes started from 0 (0-15 heads) from what I remember. Edit: https://www.win.tue.nl/~aeb/linux/Large-Disk-4.html I will try, but I think my BIOS works differently. When I enter as I noted, I see 254 MB, which is …

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Re: CF-IDE not working

Posted on 2018-04-24, 21:50

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I now have a 256 MB Compact Flash card here. IDEINFO.EXE says the geometry is 997 cyl / 16 heads / 32 sectors. I have entered these values in the BIOS of my 286. I can partition using fdisk, I can format c: /s with no problem and copy dos files over from floppy. However: when I try to read a file or …

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Re: How to you setup CF Compact flash cards on 286 - 386 - 486 Computers

Posted on 2018-04-24, 21:39

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow, thanks! The IDEINFO.EXE worked! I had been struggling to get the geometry for a 256MB card. Since I don't have a regular PC anymore, this was the only way on my 286. 😀

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Re: I built the AdLib reproduction card

Posted on 2018-04-24, 11:54

by

by root42

in Marvin \ Sound

in Marvin \ Sound

So I guess I'll solder two more and auction them off for interested people. When doing this, I hope you get banned on every retro forum on the whole net... Hold your horses guy putting values on every retro hardware without being asked. While replicas are semi-fraud friendly, the card shown here …

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Re: Can you still buy AT cases new?

Posted on 2018-04-24, 07:35

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can one mod an ATX case? I figure the ISA slots should fit, right? Using an ATX power supply is a good idea anyway. I guess the ATX I/O plate would have to be made custom, since AT boards usually only have a DIN keyboard connector. Also the mounting screws might be a bit off.

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Re: DOS Development Forum?

Posted on 2018-04-23, 19:16

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by root42

in Milliways

in Milliways

Recently I installed Turbo C on my 286 project. I only have floppy drives so far, but it was awesome. That's where I learnt C first. Having a forum would be great. My bucket list still contains 'write your own adventure game engine'. And I would of course do it for retro PCs.

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Re: DOS Development Forum?

Posted on 2018-04-22, 21:14

by

by root42

in Milliways

in Milliways

Would love that, too.

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Re: CF-IDE not working

Posted on 2018-04-22, 19:04

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is it at all possible that I could circumvent this problem by partitioning it into smaller segments? No, absolutely not. You could try some DDO software though as mentioned earlier in the thread. I can confirm that partitioning does NOT help. Already tried that... I am going the NIC + XT IDE ROM …

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Re: I built the AdLib reproduction card

Posted on 2018-04-22, 19:03

by

by root42

in Marvin \ Sound

in Marvin \ Sound

The idea with the regulator sounds interesting. But I think I don't want to shoehorn it on my existing board. Would be nice to augment the PCB design, though.

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Re: I built the AdLib reproduction card

Posted on 2018-04-22, 11:41

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by root42

in Marvin \ Sound

in Marvin \ Sound

Yes, of course I won't give them away as legit AdLibs. This is clearly a reproduction. And right now I don't NEED three AdLib cards... 😉 Sergey Malinov has PCB designs for another OPL2 ISA card on his site. However, I thought it is neat that you can build your own AdLib lookalike.

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Re: CF-IDE not working

Posted on 2018-04-22, 06:46

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, I have found a bundle of three NICs on eBay. Let's see if I get them... A colleague of mine has a pretty good EPROM programmer. So that shouldn't be a problem. One of the eBay cards even has jumper settings silkscreened on the back. Allows you to set size and address of the Boot ROM. That …

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Re: CF-IDE not working

Posted on 2018-04-22, 05:05

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The easiest way is to get a network card with a boot ROM socket, buy a cheap compatible flash chip for it, and flash the XT-IDE BIOS onto that. If you don't have a way of flashing the ROM, see if you've got a network card (perhaps for a more modern PC) that supports flashing. Then you can use that …

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Re: CF-IDE not working

Posted on 2018-04-21, 22:27

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a similar problem... 1GB CF card in a 286 PC. Can write to it, but not read from it. Always drive not ready errors. So one option I read is drive overlay software. I saw the links on phils computer lab, but there is only a windows setup program to write to a floppy. I have a mac and no floppy …

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Re: I built the AdLib reproduction card

Posted on 2018-04-21, 21:27

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Hi, yes, it has gold edge connectors. Aisler makes pretty decent quality PCBs. Plus for very small batches (they start at 3 PCBs) they were the cheapest I could find. I have 2 PCBs left, as well as the components. So I guess I'll solder two more and auction them off for interested people. The whole …

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What inexpensive HDMI upscaler to use for VGA?

Posted on 2018-04-21, 20:23

by

by root42

in Marvin \ Video

in Marvin \ Video

Because they are so cheap, I ordered one of the generic Arcade/VGA/EGA/CGA to HDMI upscalers off of eBay. It kind of works, but does not like the 720x400 VGA text mode. It only shows one frame, and then freezes the image. I also do not want to spend upwards of 100 EUR for a device, because I do not …

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I built the AdLib reproduction card

Posted on 2018-04-21, 06:15

by

by root42

in Marvin \ Sound

in Marvin \ Sound

And I have to say it was extremely fun! The project is very straightforward. Boards were manufactured by aisler, parts ordered at Mouser and the Yamaha chips off of eBay. Soldering took all in all maybe 1.5 hours. Plus I had to assemble a barebones 286 from old parts off of eBay. The card worked on …

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Re: Floppy Emulator for 5.25" PC drives?

Posted on 2018-04-12, 10:28

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

FIrst of all: I could boot properly from the Gotek emulator. Yay. Also, I noticed I can reflash the Gotek with the HxC firmware. I will try that at a later point, but for now the Gotek just works fine.

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Re: Floppy Emulator for 5.25" PC drives?

Posted on 2018-04-10, 14:48

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh, great to know! Thanks!

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Floppy Emulator for 5.25" PC drives?

Posted on 2018-04-09, 19:56

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by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

He Gotek and HxC SD drive emulators all support 3.5" drive emulation, however it seems that neither support 5.25" drives. Are there any alternatives that do? I have an old board here that only supports 5.25" it seems. So a solution would be nice...

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