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Posted: Fri May 31, 2019 6:15 pm
by TMst
N/A
Re: MZ Collection
Posted: Mon Jun 03, 2019 7:29 pm
by Pacman
Hi,
The electronic board is more like an 8-bit output data buffer (74LS244) associated with address decoding (74LS00 and 74LS02).
There is no EPROM so no software to work.
Re: MZ Collection
Posted: Tue Jun 04, 2019 6:46 pm
by TMst
N/A
Re: MZ Collection
Posted: Tue Jun 04, 2019 9:42 pm
by fitus
Some kind of ROM disk, probably?
Re: MZ Collection
Posted: Wed Jun 05, 2019 6:50 am
by Pacman
To know it would require detailed photos of the double-sided circuit to see what address is used by this card.
Re: MZ Collection
Posted: Wed Jun 05, 2019 4:37 pm
by Pacman
Is the left electronic board of the first picture (the green PCB) the QD interface?
It looks like it has exactly the same components: LS00, LS02 and LS244.
Re: MZ Collection
Posted: Thu Jun 06, 2019 2:15 pm
by TMst
N/A