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Altera EP1810 UV-erasable CPLD: 48 macrocells
Reverse-engineering: www.eevblog.com/forum/projects/reverse-engineering-some-l...
This set of images were created by implementing various colour filters as discussed on my blog: softwarebydefault.com
In case you were wondering, those Xeons are really, really huge. Like big enough to break your foot if you drop one on it, seriously. So big I wasn't able to put the system into another casemod I wanted to do. Darn it.
The main PCB of the unit. It contains a Z80A CPU, Z80A-PIO (for the parallel interface), Z80A-DART (channel A for the RS232 interface, Channel B is switched between the current loop interface, cassette interface and internal strip printer), Z80A-CTC (baud rate clocks for the DART), 34K RAM, 30K ROM, the printer control microcontroller and glue logic.