Re: I pillaged parts from my Chinon FR-506

Posted on 2022-11-10, 18:37

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you so much! Could you also get the two on the motor board? Those should be easier. I think the one that's missing should be around 4.7uF according to a datasheet for a similar chip, and the other I measure almost nothing so there could be some parasitics affecting it. Frustrating that the …

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Re: I pillaged parts from my Chinon FR-506

Posted on 2022-11-10, 18:12

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

in circuit measurement, ( if any other responder whines or complains about it, they'll be put on santa's naughty list), using a metrix mx54. C21 108µF C10 20 or 100 nF * ( depending on which range is selected on the mm) C20 200nF C17 40, 90 or 200nF * C14 15nF C9 40, 86 or 200nF * fluke 12b on auto …

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Re: I pillaged parts from my Chinon FR-506

Posted on 2022-11-10, 14:51

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Let's try another angle at this. I cannot find a datasheet for the controller on this drive. It's branded CHINON and part# is T8745F, made in Japan early 1992. Maybe this is a custom Chinon part, or maybe it's rebranded. This part must have all the floppy drive functions in it because the only other …

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I pillaged parts from my Chinon FR-506

Posted on 2022-11-09, 13:46

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Story time. When I took my Chinon 5.25 drive out of service perhaps 25 years ago, it went into my scrap box. It was working, but by that time they were considered nearly useless. I tossed all the 3M 5.25 floppies I had too. I took the top metal shield off and probably cut it up for some thing I was …

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Re: Bought these (retro) hardware today

Posted on 2022-11-08, 13:02

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Shponglefan wrote on 2022-11-07, 22:03: Had a pleasant surprise in today's mail. Currently working on a couple 386 builds and can't wait to try this out in one of them. 😁 (Does this count as retro hardware?) It's ISA, so yes of course it's retro.

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Re: Bought these (retro) hardware today

Posted on 2022-11-07, 13:56

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

kixs wrote on 2022-11-05, 16:35: New item for the collection :D […] Show full quote New item for the collection 😁 Still sealed Speedstar64 2MB ISA card I love new old stock, especially cool for an ISA video card. $200 though is a pretty penny but probably about right.

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Re: Is silicone faucet grease good for floppy drives?

Posted on 2022-11-04, 20:50

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

With a couple of different computer cases that have plastic on plastic power on switch buttons, I've found that removing, cleaning, then applying some silicone grease makes the switch both silent (no plastic on plastic friction squeak) and smooth in a way that makes turning the computer on a …

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Re: Is silicone faucet grease good for floppy drives?

Posted on 2022-11-03, 13:02

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I use Sil-Glyde for those sorts of applications - just a dab will do ya, so a 1.5 ounce tube will last a very long time. https://www.amazon.com/AGS-Sg-2-Lubricating-Compound/dp/B07Q61TGV4 I think this might be about the same stuff. It might be a little thinner by observing its use on a Youtube …

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Re: Is silicone faucet grease good for floppy drives?

Posted on 2022-11-03, 12:59

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Deeming from the info/pics where it's used to lubricate O-rings in the listing, it's general purpose silicone grease. Nothing special. Perfect for nylon gears, guides, screws, etc in a floppy drive. Clean the mechanism thoroughly and apply the silicon grease very sparingly. That kind of silicon …

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Is silicone faucet grease good for floppy drives?

Posted on 2022-11-01, 15:51

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've been reading about lube to use on plastic parts and it makes sense to not use oil-based products. Does anyone know if silicone faucet grease is good to use, like this? https://www.amazon.com/Danco-80360-Waterproof-Faucet-Grease/dp/B000DZFUNY It is thick so I'm thinking it'll be ok on a floppy …

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Re: Bought these (retro) hardware today

Posted on 2022-10-31, 19:51

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Found this TEAC FD-505 at some surplus store today for $4. Seems to be in barely used condition. There's nothing wrong at all with the faceplate; it was half unclipped so I fully removed it. Noticed your earlier (deleted) post re. the missing 3.5 eject button - it's nothing more than a small cube …

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Re: Bought these (retro) hardware today

Posted on 2022-10-31, 00:29

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Found this TEAC FD-505 at some surplus store today for $4. Seems to be in barely used condition. There's nothing wrong at all with the faceplate; it was half unclipped so I fully removed it.

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Re: Bought these (retro) hardware today

Posted on 2022-10-24, 19:02

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well its not exactly strictly by the book retro but its not really modern either ..we really need a tag for that hardware that falls into that weird zone where its not one or the other. Its the same deal with my 1st generation Ipod Touch, its too old to be modern but not quite old enough to hit …

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Re: Bought these (retro) hardware today

Posted on 2022-10-18, 17:04

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's interesting to see what others consider vintage. I for example don't consider anything ATX to be vintage, even though an ATX board could be well over 20 years old. I draw the line for my PC collection at the ATX corm factor, to keep things consistent and easier for me to build. I do however …

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Re: Bought these (retro) hardware today

Posted on 2022-10-18, 16:06

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bought a socket 423 GA-8IDX3 (rev. 1.x) board. Seller said it has stability issues. I can count 4 of those issues :) if it the BIOS I can desolder and flash + add a socket for future stuff. It has dual bios, really easy. https://www.gigabyte.com/Motherboard/GA-8IDX3-rev-1x/sp#sp Seller's pic. It's …

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Re: Bought these (retro) hardware today

Posted on 2022-10-18, 13:01

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd recap it fully. I have a 6VXC7-4X with roughly the same cap choices, and needless to say - if I got vast improvement over OC with new caps on a single socket board - you should have even greater performance with 2x Tualatins, provided you fully recap it. With ~27 caps it'll be a fairly large …

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Re: How does DOS know number of floppy drives?

Posted on 2022-10-13, 20:21

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On PC-compatible systems, the phantom drive "B:" is not provided by the BIOS, but by DOS. The intention of the phantom drive is that you can copy files from one floppy to a different floppy using "copy a:file.txt b:". DOS keeps record of whether the drive was accessed last using the letter "A:" or …

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Re: How does DOS know number of floppy drives?

Posted on 2022-10-12, 18:10

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Even better, any recommendations on where I can read about this, and the boot process starting from POST and into DOS? This article does a very good job describing the boot process of an XT-class machine (though many of these are still applicable in later PCs and BIOSes too). http://philipstorr.id. …

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Re: How does DOS know number of floppy drives?

Posted on 2022-10-12, 17:23

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On PC-compatible systems, the phantom drive "B:" is not provided by the BIOS, but by DOS. The intention of the phantom drive is that you can copy files from one floppy to a different floppy using "copy a:file.txt b:". DOS keeps record of whether the drive was accessed last using the letter "A:" or …

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How does DOS know number of floppy drives?

Posted on 2022-10-12, 12:14

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I thought this would be an easy one to Google, but no. How does DOS know how many floppy drives are in the system? Even better, any recommendations on where I can read about this, and the boot process starting from POST and into DOS?

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