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@NJRoadfan I have an almost complete circuit desing, Is there a mention about the address space somewhere? since the ram chip have 15 address lines and the data bus transmit twice at 8 bit width I'm not sure if I drop the first or the last bit, I would guess the first since it must be used to...

Amazing! thanks! I'll take a look at this.

Yes it's the same photo that let me assume it would be reasonably simple to copy I might try to use the printer with a computer that have a built in serial port, the adapter I made is based on this pinout from the manual, DIP switch like you said and driver configured with flow control, maybe...

The support for spooling across a RS232 to USB adapter and the printer driver itself is very bad, I can't exactly blame the linux devs to not support this 30 years old printer haha so I never got it to work, I can slow down the communication baud rate to almost the minimum but then the printer...

Thanks :) @Paralel Would you have a photo of the back too? And could you confirm the inscription on U5? It confirm to me that 3-10 are data lines, I suspect most of the pins upper of 13-15 is only for more advanced functions like local talk, 1-2 +VCC and 25-26 GND. U4 is a programmable array...

Hi, I'm currently using an old ImageWriter II on my machine to print small sized envelope, I find it very convenient since it doesn't have strict paper size limitation! My problem is, mine doesn't have a buffer card, I use it via a serial adapter at very low baud rate to avoid filling the...