Benchmarks 71B versus 48GX

[KimH]

Thanks for the input - the Diagnostics says 960k and all tests seem to pass, I have run sequences for about 30 minutes. It's a wrecked unit with Zebra Soldered, Glass Broken, 71B Faceplate lost and so forth - the one I use for that type of stuff, not one that I use for anything else than HW-mods and "Controlling the World".

The PC=(A) could probably be built into a short stub, but I am not good enough - yet - to do that, that is for when the weather turns back into cold and wet

As long as the PC=(A) acts as a NOP in the older CPU, then it would probably not be that hard.

Maybe loading (A) with the address for "Beep" and then PC=(A) it would be a smooth approach

/KimH

(06-17-2020 12:36 PM)J-F Garnier Wrote:  

(06-17-2020 11:43 AM)KimH Wrote:  In later years - i think mid 86, they started to mount the 1LK7 on the PCB.

There is no way - that I know - to see the actual CPU version without opening the Case.

If it's really a 1LK7 then it's the same than used in the 28C and it supports the PC=(A) opcode. It may be a way to detect the CPU version by software. I may try.

Quote:If it is 1LK7, the LC circuit can be modified to run at about 1MHz - at about 1.1MHz the CPU starts to become unreliable.

If it starts to fail at about 1.1MHz, I would not push it to about 1MHz :-)

J-F