Mike's PCjr Page

I'm down for one for now, and maybe another one if I figure out how to assemble it properly :)

Regarding TOPBENCH: The Score is a synthetic number calculated from different benchmarks (memory, math, address calc, etc.) that illustrates the relative performance of one system to another in 16-bit real-mode DOS. (ie. it doesn't reflect performance improvements for protected-mode 32-bit processors, only 8086/80286/80386/80486/Pentium running in regular DOS.) Some numbers that might mean something:

PCjr stock 128KB: Score = 2
PCjr with a memory expansion and programs running out of the memory expansion: Score = 4 (same as an IBM PC)
PCjr + Sprint + NEC V20 CPU: Score = 8

So with the latter combination, your PCjr can operate at roughly twice the speed of a stock 4.77 MHz IBM PC. This speed upgrade can be immediately felt running games in regular CGA mode, and it can also make 320x200x16 games operate at a tolerable speed (as opposed to "nigh unplayable").

Jim,

not to worry I will build these and test before I send them out to the folks....
(NO SOLDER NEEDED )
But you will have to get the 8284 outta the JR mother board....
I can do a write up to help with that if needed.....it can be touchy if you are not so inclined to start cutting...

I am also interested!

Looks like we have a nice group of folks that want this...
So I'll wait another few days and make sure I don't order short, give folks time to decide..

Thanks
Chuck

I would love to have 1 as well! I hope I’m not too late.

not to late,

Please consider me interested in ordering one as well if it's still not too late

Put me down for one, maybe two boards.

<*> Jim

Guys..... this is still on going,, decided to get a more boards done..
but I apologize, family issues have come up and I will be occupied for a few weeks....
but this is still a go.

Chuck

Please add me to the list