[Ham-Computers] RE: windows stuff

[Paul]

Rolly (W7DGX) & Sandra Goodspeed wrote:
> I believe the 80486 was a CPU, the first of the Intel CPU"s to have the 
> math coprocessor on the same chip as the CPU. The 80386 was the 
> predecessor to the 80486 and could use a math coprocessor (I forgot its 
> nomenclature, perhaps 80387??) or math software routines. I do not 
> remember if a math coprocessor was available for the 80286. I think it 
> was (perhaps 80287??).

Yes it was the 80287.

The 80386 came in 2 varieties, the 386SX (32 bit internal, 16 bit 
external bus) & 386DX (internal & external 32-bit)- neither had a maths 
coprocessor.

The 486DX was the first that didn't need  a matchs coprocessor, the 
486SX didn't. The original 486SX were faulty DX, but later they made 
them that way deliberately.

BTw, my first computer was a Sinclair ZX81 kit (solder together 
yourself). 1K memory, witht he 16K add-on back pack which caused the 
thing to crash if it was moved. All on cassttte tapes. Could still be 
used for RTTY recieve, morse.  Think I'll install that emulator on here. 
  8-)