22 Jun
2006
22 Jun
'06
3:57 p.m.
Tony Duell wrote:
[...]
But the PCjr wasn't techically a good
machine. It also wasn't truely PC
compatible. I can think of little to recomend it, actually ;-)
As a PC compatible, the PCjr isn't too bad. As a PC clone, it is awful.
Cons
- Expansion capability.
- Some hardware in non-standard places, which broke some software.
- Shared memory between video and main memory, which slowed things down.
- Non-standard connectors for joysticks, monitors, etc.
No DMA controller!
A nasty custom gate array chip for the video circuitry
That darn chicklet infra-red keyboard
-tony