56

The most classic serial solution here was ofc a direct serial connection and Kermit the most versatile software solution. Developed at the Columbia University, NYC, Kermit supported already in the early 1980s several hundred different systems. It's most prominent feature was the ability to run over non transparent and code converted connections. Similar, but ...


47

The manual says that the smallest resolution it can handle is 800x600. That is almost certainly the key. Original VGA supported 640x480 16-colors and 720x400 (essentially a small step up from the 720x350 monochrome (MDA) text, but with color). While VGA has come to mean "any video card and monitor that uses a blue 15-pin connector" that's not what ...


24

I personally did not do any data transfer from home 8-bit systems to other systems, but I did do transfers from several older proprietary systems to Unix and MSDOS systems back in the 80’s. We used a null modem cable (serial cable) and software called B.L.A.S.T. which was a commercial product that was ported to a wide variety of systems. It is a serial ...


23

Per the developers of PSIO, the answer is no: Exactly why is [the internal modification] required? There are two signals that PSIO needs in order to function that are not present on the expansion port. These are the CS (Chip Select) and INT (Interrupt) lines from the CD controller. The job of the Switch Board is to basically forward them as well as connect ...


21

Some issues you may encounter are: Motherboard size. An AT motherboard is 13 inches from front to back, while the ATX standard mandates 9.6 inches. If a case takes an Extended ATX motherboard it should take an AT one. Mounting pillars / holes. On an AT motherboard the position of the holes is not precisely defined by the standard, whereas ATX is more ...


21

DOS is almost surely not outputting 800x600 or up, and is probably in the ballpark of 720x350 or thereabouts. Further, it's likely 70Hz, which this adapter may not like. I'd recommend you get a display that can use the signal from card natively -- any old multiscan CRT and lots of early LCDs can do this -- but if you're determined to use this adapter, you ...


20

I worked on a project quite a few years ago (late 80's) where a client purchased truckloads of surplus military electronics inventory that he intended to sell into the spare parts market. The inventory documentation came out of a mainframe computer and was printed onto a three inch stack of fanfold green bar computer paper. The project I was hired for was to ...


18

No, there were no adapters for different floppies. Data was typically copied by serial port, if it was copied at all: Programs on some 8-bit computer (e.g. Apple II, Commodore 64) wouldn't run on an 16-bit 8086 PC. There were no emulators (and the original 8086 PC would probably also have been too slow). So stuff you'd like to copy were typically source ...


18

If the IBM Model M keyboard is one of the ones that uses the AT protocol, you may be able to use a passive 5-pin to PS/2 adapter, chained with an active PS/2 to USB converter such as the Belkin F5U119. If it uses another protocol (such as XT or 3270 terminal) you will need a custom-made active converter -- https://deskthority.net/wiki/Converter lists ...


16

It should be feasible to manufacture NMOS-process parts using 0.6µm equipment that is still in current use. WDC's W65C02S, as well as their other current products, are made at TSMC on 0.6µm, though they are CMOS chips. You would need to obtain examples of the original masks, have them converted to a format usable by the newer equipment (probably whole-...


15

The SideWinder 3D Pro has its own protocol, which isn't supported by typical gameport-to-USB adapters. The best you can hope for with one of those is to find an adapter which supports the CH Flightstick Pro or Thrustmaster FCS protocols, and use the fallback mode on the SideWinder. (There's usually a switch on the USB adapter to choose the appropriate mode.) ...


12

I have done my share of transfers between incompatible systems. There were some service bureaus that could convert floppy disks between different systems, and I used some to convert CP/M-86 commercial software for an Altos 586 (my first computer) that had a floppy format not supported by all vendors, which was a common problem when new systems came out. But ...


12

There were (and are) a few possibilities to transfer programs* and data between 8 bit Commodore systems and other platforms via floppy disks and other media. Commodore 1541 floppy drives could be modified to read, and to a limited extent, write PC compatible floppies. Commodore 1571 and 1581 floppy drives for 8-bit Commodore home computers were able to ...


12

Switching Tech Tubes I do not recommend to use them because you would need to deal with high voltage and heat dissipation which can be potentially dangerous especially in class (pupils do not act with self preservation in mind sometimes). Relays Very nice alternative. Easy to understand (switch with electromagnet) using single low voltage (5V,12V,48V). ...


12

Is this a special signaling mechanism of some sort, No. Buttons are always on/off mechanics. The PC doesn't have any means to detect anything but high or low, according to the threshold (*1) the input circuit has (*2). or does it merely indicate that the switch is dirty? Yes, a dirty switch, a used up one, a broken one, some bad soldering adding a ...


11

The easiest (PnP) approach is definely using two adapters. The first one should be a USB to PS/2 (miniDIN) adapter; This one needs to be an active adapter, such as this one: Avoid using weird smaller adapters like the one below - they probably won't work because they're designed for motherboards that have a PS/2 host, which allows them to be passive (...


11

I successfully got the RK-P400C printing from a serial console (minicom on Linux) today. Here's how to do it for future reference...;) The DB25 connector on the right side is a 25 pin serial port. At the top right of the typewriter there are sets of switches to select font and size, at the far right of those are two switches with the labels "KBI, KBII, EXT" ...


11

Does anyone know hard or time consuming it would be to achieve this? Assuming you have a modern PC with VGA out, or you can put in a graphics card with VGA out, it's not hard at all, if you know a bit about how this works. You need to look up the horizontal and vertical sync frequencies that your monitor operates with (use the documentation, or google for ...


11

I posted a comment on the reverse-engineering Q&A you linked before I realized it'd do better as an answer here. The answerer there found that googling Accom and Axial from your photo turns up a series of video editing controllers, and documentation for a DE-9 connector. If it's an editing controller running RS-422 over DE-9, it's almost certainly Sony 9-...


10

There are two aspects to this. The cable for the physical connection and the driver for the communications protocol. I suspect with adaptor upon adaptor you are either losing voltage and therefore connectivity or the protocol is getting confused. Your core problem will lie in the communications protocols. There is a defined USB protocol to which ...


9

My suggestion would be to use relays. Still readily available, and while you wouldn't be using vintage parts, there were definitely some computers built with relays. Can't handle as high speed as well as good vacuum tubes, but that isn't an issue here. The good part is that even if you can't see much - which will depend on the relay, you can hear every click....


9

Nice idea. I like it. Tubes et all. My general understanding is that in early computing, pre-solid state technology, a bit would represented by a single vacuum tube. That would be a missconception to start with. A tube doesn't store anything. In 'tube based' computers, tubes (usually triodes) provide a NOT functionality, as AND/OR are made up of resistors ...


9

One strategy is to convert the digital to analog, then the analog to VGA. CGA consists of digital red, green, blue, and intensity (RGBI) 5V signals, plus horizontal (15.75 kHz) and vertical (59.92 Hz) sync. VGA consists of analog red, green and blue signals (0.7V peak to peak), plus horizontal (31.46875 kHz) and vertical (59.94 Hz) sync (RGBHV). The first ...


8

Are you just looking for a generic PS/2 to USB adapter? Ziotek's SANOXY PS2 Keyboard To USB Adapter seems to have good reviews on Amazon and work well with older keyboards.


8

Unless going the SCSI bridge route described in another post, you will very likely need a PC with an ISA slot - such mainboards were only common up to the Pentium 3 era, unless you are using a PC using the PICMG backplane form factor used for industrial control. ST-506 interface drives (aka MFM/RLL) were very dependent on the controller paired to it. A ...


8

I transferred a lot of text documents and spreadsheets/databases from my ZX Spectrum to my Sinclair QL using the Sinclair network, a 80kBps serial network that was inbuilt into the QL and provided by Interface 1 on the ZX Spectrum. This network could connect up to 64 QLs and ZX Spectrum. My Spectrum also had to serve as a print spooler for the QL, as I did ...


8

The Apple IIc monitor (A2M4043) mentioned in the question takes a composite video signal. Some older laptops and graphics cards output composite or S-Video either directly or through a breakout cable. Otherwise, an external graphics adapter that interfaces to the PC via USB and outputs VGA is about $10-15. Once you're working in the analog domain, you have a ...


7

You said "The computer is wired directly to the air system". I'm not sure exactly what this means, but I'd infer there is a cable between the PC and the air system, and that cable is most likely connecting RS-232 (or similar) serial ports on the two devices. I think the best starting point would be try to understand THAT interface as fully as possible. I'd ...


7

For a while, many PC cases were made to be both AT and ATX compatible. This would have been in the mid-1990s, during the changeover from Socket 7 to Slot 1 (Pentium II) and Super Socket 7 (AMD K6 series) when motherboards were made in both shapes. You could try looking for cases from that period, or from the early 2000s. AT motherboards (in practice, ...


6

on ZX (Zilog Z80) we usually used tape interface (save on ZX) which is a serial link in its core. We sometimes connected 2 ZX by it without the tape to copy data for testing ... It can be also used to move data to new tech like PC by connecting tape output to LPT on PC and using emulator load into it (by using tape load...) Or even save the tape as wav/mp3 ...


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