DOS ain't dead

Good PC's needed (80386, 8086, 4004 :-D) report what you h (Developers)

posted by marcov, 02.05.2008, 23:17

> > Not disabled, but defective. Intel's method was to have one production
> > line, then test chips. Good FPU > sell as DX. Bad FPU > sell as SX.
> > Similarly with speed - run chip at increasing frequencies, then label
> > according to where errors begin.
>
> Do you think they had as many defective CPUs as they sold SX processors? I
> think that math coprocessor itself takes only small surface of silicon die,
> sure much smaller than cache.

(the cache wasn't that big in those days. 8k or so, except later stepping DX4's that had 16k).

But both are right as far as I know. In the beginning they were a way to create a market the partially broken ones (just like the first Celeron's were P-II's with defective cache). But when yields go up, a special line (mendocinno in Celeron's case), or "good" CPUs are marked as the inferior product.

Complete thread:

• Good PC's needed (80386, 8086, 4004 :-D) report what you h - DOS386, 01.05.2008, 05:02 (Developers)
  • Good PC's needed (80386, 8086, 4004 :-D) report what you h - Rugxulo, 01.05.2008, 05:44
    • Good PC's needed (80386, 8086, 4004 :-D) report what you h - DOS386, 01.05.2008, 05:50
      • Good PC's needed (80386, 8086, 4004 :-D) report what you h - Rugxulo, 01.05.2008, 05:57
        • Good PC's needed (80386, 8086, 4004 :-D) report what you h - RayeR, 01.05.2008, 14:12
          • Good PC's needed (80386, 8086, 4004 :-D) report what you h - Steve, 01.05.2008, 21:14
            • Good PC's needed (80386, 8086, 4004 :-D) report what you h - RayeR, 02.05.2008, 01:15
              • Good PC's needed (80386, 8086, 4004 :-D) report what you h - Steve, 02.05.2008, 09:24
                • Good PC's needed (80386, 8086, 4004 :-D) report what you h - RayeR, 02.05.2008, 16:04
                  • Good PC's needed (80386, 8086, 4004 :-D) report what you h - Steve, 03.05.2008, 08:01
                    • Good PC's needed (80386, 8086, 4004 :-D) report what you h - RayeR, 03.05.2008, 14:12
                • Good PC's needed (80386, 8086, 4004 :-D) report what you h - marcov, 02.05.2008, 23:19
                  • Good PC's needed (80386, 8086, 4004 :-D) report what you h - Steve, 03.05.2008, 08:03
                    • Good PC's needed (80386, 8086, 4004 :-D) report what you h - RayeR, 03.05.2008, 14:14
                      • Good PC's needed (80386, 8086, 4004 :-D) report what you h - Steve, 03.05.2008, 15:20
              • Good PC's needed (80386, 8086, 4004 :-D) report what you h - marcov, 02.05.2008, 23:17
                • Good PC's needed (80386, 8086, 4004 :-D) report what you h - RayeR, 03.05.2008, 14:23
  • Good PC's needed (80386, 8086, 4004 :-D) report what you h - marcov, 01.05.2008, 14:13
  • Good PC's needed (80386, 8086, 4004 :-D) report what you h - rr, 02.05.2008, 16:43
  • 4004 - Steve, 05.05.2008, 01:41
    • 4004 - Rugxulo, 05.05.2008, 18:45
      • 4004 - Steve, 06.05.2008, 04:58