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Ah indeed, I should have taken the time to read everything from the start ;) This project seems to be heading for success. Good luck with the prototypes !

A short discussion about modern MVS bootlegs brought the question of the availability of open-hardware cart boards. Surprisingly a Google search returned a useful result: this thread ! What a coincidence. If using a CPLD for PCM turns out to be a problem, an equivalent can be made with ~10...

Hello, All I have left from this is the Neoprint board (that I'm way too lazy to set back up), and a vague souvenir of what the breadboard circuit did. It was fully analog, possibly a CD4528 or one or two NE555 wired as monostables. The activity on the data pin was triggering one of them, and...

Yes indeed, an EPM7128S would be up for the job. The pinout is different though, so a different board would need to be designed. I didn't chose those chips because they aren't made anymore and I didn't want to deal with counterfeits sold as NOS, but it might be worth giving it a shot. Never...

Hi bytestorm. I'm not sure if a J-Link can program these. Granted all the PLD programming cables do basically the same USB-to-GPIO thing but vendors do their best to force users to use their own variant by using special VID : PIDs and commands. Clone Lattice programming cables go for less than...