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Elektronika MK-52: The MK-61 big brother?
02-10-2015, 10:45 AM (This post was last modified: 02-10-2015 12:44 PM by jhl.)
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RE: Elektronika MK-52: The MK-61 big brother?
Thank you for all the useful information! I'm waiting on a dead мк-52 -- which will hopefully just be the PSU too...

I got curious and had a dig through the schematics looking at the IO ports, thinking it might be entertaining to hook something up to the poor thing. XS3 looks like a straight-up read only ROM bus (assuming the вио line on pin 9 is to disable the built-in EEPROM - does anyone know what that's short for?)

I had thought the other port was for controlling external gadgets in a similar fashion to the мк-64. Indeed, the serial data loop runs to that port. But it has three lines to set clear/write mode, and it's also got a line to all the serial data devices *except* the EEPROM controller via си (sync line) - it looks like that port is designed to talk to the EEPROM controller directly and bypass the rest; it can even feed power in to the +5 input, suggesting it's a factory test/programming port.

Does anyone know if there were any IO peripherals for the -52? I can't find anything in English. As it stands it looks like output is only possible by sniffing the serial bus or sequencing reads to the ROM port.
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RE: Elektronika MK-52: The MK-61 big brother? - jhl - 02-10-2015 10:45 AM

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