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Hello, I am considering an upgrade on my System/36 5363 and one of the facets I find it somewhat lacky is in communications. For this reason I would like to know if there was some sort of communications card available and what protocols would they use (modem? token-ring?). Maybe I focus on a...

Hello, I recently purchased an Epson PC-J3, which has the same "Mars Board" than the Epson Equity I. Apparently the system seems to work but as the original video cable is missing, I cannot be completely sure. Its monitor is the original one, as it is the one that appears in the manuals and in...

Hello, As the title implies, I am studying the components in the Type F keyboard. Generally there are not many components other than an 4048, a SLT and passives. By examining the PC-XT schematics it seems it is some kind of analog amplifier (a sense amplifier?) but I am not very familiarized...

Hello, I don't know if this is the right place to ask for this, but I would like to ask if the creation of a new subcategory would be possible. It should lay under the IBM category to group all threads about all pre-PC small systems the company made. We have a problem with dispersion: as the...

Good morning, As the title implies, I am in need of an ICE for 8085 for my Datamaster. There aren't many on sale and the few in conditions are both expensive per se and expensive to deliver at my location. Not talking about the voltage difference between our European electric network and the...

Hello, I have an official training video from IBM to teach about the use of the System/1's hard-drive units. Unfortunately the disk won't play at all in my laser disk player. It just rejects it, without trying to read it at all more than a few spins. As I am new to the LD systems, does anybody...

Hello, We have an IBM 9404 at home, unfortunately we cannot IPL (boot) it. The tapes containing the microcode are in bad shape and as a result it does not load. My father, who has worked with some AS systems told me the microcode is compiled specifically for every single machine and having in...

Greetings, I have a SAGA PBS-800 computer which seems to be a CP/M system. It has its lateral panels made of wood and has a calculator SoC integrated into the keyboard. I could only find a single reference in a museum in the US and some advertisement. That's all. Does anybody around here know...

Hello, I would be interested the original set of documents which came with the first version of the IBM Datamaster. Those were in the form of at least 8 binders. I would also consider exchanges for other documents or even some piece of hardware. Regards

Greetings! I committed the error of going into business before introducing myself... sorry. I'm from Andorra and collect old systems. I am here to learn as much as I could and to share any piece of old computers' information that could be helpful, for small is it could be. Somehow I have luck...

Greetings, I acquired an IBM System 23 "Datamaster" a couple of weeks ago. I have found many people over the not so many places where this computer is being discussed where they stated its non-reparability (the motherboard was designed as FRU, after all). As I am in process to repair mine, an...