I worked at Mostek maintaining the Fairchild Sentry testers used to test the Z80s when they first began to manufacturer them. The second computer I every
built (parts, pcb, solder) was the SDB-80 which was the Mostek Software Development Board for the Z80 with 16K bytes (8 - MK4116 16K bit) dynamic RAMs
which Mostek also made. The first wire wrap board I ever made was a 48K byte dynamic RAM board also using MK4116s that worked with the SDB-80. I can
tell you there were a bunch of happy technicians when we were told that Mostek would be second sourcing the Z-80 and even happier when we were told we
could buy SDB-80 kits and build them ourselves! Those were really fun days. I still have a Zilog Z80 in a ceramic package that says it was manufactured in
Dallas even though Mostek was actually in Carrollton a suburb in Dallas County just north of north-west Dallas.
I haven't kept up with modern processors but suspect they can't match the interrupt capabilities of the Z80, and interrupts can really make a design sing.
I have owned not to long a go, I had bought 2 used Sinclair computer, I had repair and trouble shoot. I only did basic programming, but then I no idea. They both stopped working.
