* On Wed, Apr 06, 2016 at 03:11:54PM -0600, Eric Smith <space...@gmail.com> wrote: > SL0227 is a house number, and isn't likely to mean anything to anyone. > It might be a Z80, but it could just as easily be a mask-programmed > Z8.
This is good information. I did measure a 3.3MHz clock signal on pin 6, which leads me to believe it's a Z80 or derivative, but I will proceed with caution and try not to make any assumptions. Voltages look OK, I see the aforementioned clock, and my cursory inspection for cold solder joints and broken traces didn't show anything obvious, so next I'll dump the ROMs and see what secrets they reveal. -Seth -- Seth Morabito s...@loomcom.com