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Thanks for the diagram, checked and the tda1170s is getting 14.8v in PIN2. Pin 9 gives stable 49.8hz C401 has also stable 49.8hz at the pc connector side, but the other side of the cap that goes to pin 8 of the TDA1170 is jumpy and can see 49.8hz but it jumps on the scope to 16hz, and **. Maybe...

Hi got an IBM 5151 monitor, and it has seen better days, the "seller" told me that someone dropped it from a truck when he moved places in the past. The casing is cracked but the guts of the monitor are ok the PCB is in a single piece with no cracks don't seem to be any cold solder joints...

The original project in the thread is perfectly cool, don't need to add all that things you guys are asking for to much. The only thing is if the full 640k could be cached, could make this better. They are little software for 256k in dos.

Look in my case, replaced all the PSU caps all (except the big high voltage ones that were expensive and looked ok) the caps looked ok until I removed them, and underside of them you can see the electrolyte. Also, the brightness of my screen was not very good so I replaced all the caps on the...

Cool, searched also about twin-head but had no luck, the ct-6280 is very different and has only a single row of dip switches.

Found some kind of ram card and like to use it on my XT but can't find the manuals to learn how to set the ram etc. The cards say "CT-6050 MULTI FUNCTION" and "copyright 1985" on the back "made in taiwan". Searched on google and stasons but found no card like it, maybe somebody knows about it...

The issue is the chips are expensive this days and i need a lot of them, so no L2 cache for now.

Another great method is covering stuff in fuel and setting it on fire for a few hours, this usually removes all dirt. xD

Also have a AXPpci33 and a 166 chip, no L2 cache. Currently have NT 3.51 on it but runs NT4 also. Tried dec True64 and runs fine, but you have to flash the firmware to srm, so is not easy to switch between windows and unix.

Tried lots of addresses the picture is probably from when I tested 240, tested a lot of them but had no luck.

Finally think I found the "correct" version for the dt07 card: https://archive.org/details/dectalk-ms-dos-drivers There are 3 files the correct one is the one called PC2V42C. The uguide.txt file says: FCC COMPLIANCE. FCC ID A09-DTC7B. That is exactly the FCC-ID printed on the card, check all the...

Shematic

A long long time ago, found this Luxor ABC80. The computer is quite rare and on the internet is little information about it, the only useful information that I got where the schematics. This unit uses a monitor/PSU combo similar to how an Amstrac CPC could work. So decided to try to adapt a...

The seco.com site was used by other companies until 2007 and the stuff there is much newer than this board. Now looking at it see more markings like "CS473-REVD" "BD revD 2"

Take a look there and there's nothing about old products, now you mention it going to check using the Wayback machine maybe can find something there.

Found a SECO MTL M 94V-0 4309 SBC board, could like to make a sort of mini retro pc out of it. This board looks quite cool has a Pentium MMX socket 7 CPU, and lots of I/O including audio (there's a crystal chip on the backside of the board). Now the PSU connector is easy to figure out the...

Hi anyone knows about this card? Searched on google but there's nothing. From the name "PC APPLE TRANSFER CARD FT-850306 1985 V 1.0", I suppose is for connecting an apple floppy drive to a pc ?. But don't seem to be any mentions in any place about it.

I'm such a dummy 🤦‍♂️ The program was waiting for my input! xD. Ok now entered all the data for my drive The drive will ask for an error map but deres nothing on the top of my drive so I choose no. It will format ok and then when the verification starts will complain "Bad drive !!! [4]" after a...

This is my first time dealing with these very old drives. I have an ST-225 drive and use a segate11m/11R 8 bit controller. The drive will do all the proper noises when starting and will ask "your c drive has not been insstalled" "do you want to install the unit? (y/n)" Then the bios "2.1" will...

Hi this is super cool :D, is the board available for purchasing?