Re: Information request for SMC I/O card

Posted on 2023-03-25, 22:45

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What version of orcad are you using ? Tried v6 and v7 but they complain about a missing SDT.CFG when opening the .sch. V7 did open the .lib and converted it to a readable .OLB file. Can you export/save the .sch as a .dsn ? If so then you should be able to open it in a Win9x version w/o error. Will …

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Re: Information request for SMC I/O card

Posted on 2023-03-25, 01:54

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Came across it doing a partial text search of all the 1990s URL links Wayback has archived for smc.com...the actual link is here - https://web.archive.org/web/19970715072203/http://www.smc.com:80/ftppub/chips/superio-sch/sio6xxe.zip Great Work ! You have an incredible talent/smarts when it comes to …

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Re: Information request for SMC I/O card

Posted on 2023-03-24, 20:11

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

dj_pirtu wrote on 2023-03-24, 06:57: Epic TIP: use google lens. I thought about searching on Google images, but that rarely gets me anything useful.

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Re: Information request for SMC I/O card

Posted on 2023-03-24, 20:10

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Closest I got on wayback was the attached, and I'm not even sure what it is (.lib / .sch files - some kind of schematic??) but the date seems about right (autumn 93) and if you open the .sch files in a hex editor, many of the components / pin blocks seem to be referenced by name. Still might be …

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Re: Information request for SMC I/O card

Posted on 2023-03-24, 20:04

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Good luck ! You can start with the serial ports, from datasheet PSPIRQ and SSPIRQ are Com1 and Com2. They should go to a 3 pin jumper to set IRQ 3 or 4. Using the pinout and descipts (pg 4-18) and then from pg 128-130 for the 666GT hardware config might get you started... Am sure you would have …

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Re: Information request for SMC I/O card

Posted on 2023-03-24, 01:46

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can not find any info, need an FCC ID. Appears missing two PALS and BIOS (would be needed for support of two floppy ports on older systems). Here is the SMC datasheet.. No FCC ID either. It's interesting there's no information out there for this, and missing those chips. It looks almost unused and …

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Re: Bought these (retro) hardware today

Posted on 2023-03-23, 16:15

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got for $5 and was listed as not working. It works though and in great condition! Love the Teac 5.25 drives. Works of art.

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Information request for SMC I/O card

Posted on 2023-03-22, 22:52

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can anyone identify this card? I had no luck with the "SIO6XX" marking, and no luck otherwise. Looking for jumper setting information, and what perhaps should be in the empty sockets. Sorry, I just noticed I took the pic upside-down!

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-20, 23:05

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

HDC and FDC share address space, it's a pretty bad setup but usually it works if the controller (card or on-board) knows to de-mux the individual ports. Otherwise you need an IDE device (HDD or CF card, or other adapter) that is smart enough not to respond to I/O that is not meant for it. I guess …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-20, 21:05

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

which CF card are you using? It's a 256MB Kingston I bought almost 20 years ago for a digital camera. Apparently I'm reinventing the wheel because afterwards, I found these: https://www.vogons.org/viewtopic.php?t=50434 https://www.vogons.org/viewtopic.php?t=34530 I never thought about the …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-20, 19:22

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have found the problem, sort of. Get this: it appears to be the CF card I have attached. I have tried different combinations of a totally different floppy controller, and Sergey's floppy BIOS. None of that made the problem go away. The only two things that did are 1. pull the CF card, or 2. …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 23:58

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's now a 3.5" 1.44MB, and it's set to that in the BIOS. Interestingly, it sometimes works, but most of the time not. I booted from a DOS 6.22 disk, swapped disks and that worked. But then I tried it again and it didn't work so it's intermittent. If I use CTRL-C, it will read the new disk …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 22:20

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by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

EDIT: pulling the disk change line to ground doesn't change the state of the register per debug. Curious. Now I would wonder if you force a pullup on pin34 to see if there is a change. For a pullup you would want to connect pin 34 through a 10k resistor and maybe a diode to 5v. It might seem a bit …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 17:54

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

DOS debug always prints hex values. As for it being (not) normal - looks OK to me? Only bit 7 is defined, the rest can be connected to whatever (some drives can output detected density). b7=0 in your case which means no disk change was detected - this bit should be 1 if the drive has /DC=0, and as …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 17:53

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hmm, debug gives me 1A, and IOVIEW gives 26. Neither value seems normal. DOS debug always prints hex values. As for it being (not) normal - looks OK to me? Only bit 7 is defined, the rest can be connected to whatever (some drives can output detected density). b7=0 in your case which means no disk …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 15:45

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

the disk change line goes low every time I access the drive, even though I changed the disk only once Since the drive doesn't know what the OS expects, the signal is kept low on each access until the next head seek. If the head moves yet the drive still outputs low then it must be a problem with …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 15:38

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hmm, debug gives me 1A, and IOVIEW gives 26. Neither value seems normal. DOS debug always prints hex values. As for it being (not) normal - looks OK to me? Only bit 7 is defined, the rest can be connected to whatever (some drives can output detected density). b7=0 in your case which means no disk …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 15:32

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

debs3759 wrote on 2023-02-19, 03:41: 1A will be the hex value of the decimal number 26, so it's probably just displaying it in different bases That is an interesting coincidence, but IOVIEW is displaying in all hex., and I have seen both 1A and 26 when using debug. Still not sure why I never see …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 03:20

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Read up on the debug utility that ships with DOS. That can do it. It's been too long since I used it for me to be able to describe the specifics, but I believe you run debug.exe, then you type (inside the utility) "i " to read one byte from the port. My reference books are still packed (in a …

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Re: How to troubleshoot floppy disk change problem

Posted on 2023-02-19, 00:03

by

by eesz34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Read up on the debug utility that ships with DOS. That can do it. It's been too long since I used it for me to be able to describe the specifics, but I believe you run debug.exe, then you type (inside the utility) "i " to read one byte from the port. My reference books are still packed (in a …

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