14 May
2004
14 May
'04
2:13 p.m.
At 01:24 PM 5/13/04 -0400, you wrote:
On 13 May 2004 at 9:57, Kane, David (DPS) wrote:
This one is dated 9509. I haven't checked any others. FWIW there is a
20.000MHz crystal right next to the CPU so I'm guessing that the CPU runs
at 20MHz and that that's what the "C" suffix means. The CPU is in a plastic
package so "PS" sounds correct for the package.
Only a very minor detail, but I beleive that the
certain Zilog chip
designations also indicate the max clock speed. For instance the
Z0800110PSC is a Z8001 (Z08001.. portion), with a max clock speed of
10MHz (..10.. portion)....
The 1983 Zilog databook "Ordering Information" section designates speed
grades by letter suffix. No suffix is 4 MHZ, "A" is 6.0 MHz, and "B"
is 10
MHz, so a 10 MHz Z8001 in a plastic DIP with a 0-to-70 C temperature range
would be ordered as "Z8001B PS".
However, two things occurred to me:
1. The parts predate or postdate the databook sufficiently that the
ordering codes had changed. Are there obvious date codes on the chips?
2. The parts aren't Zilog issue at all, but rather AMD (a second-source).
Are there obvious Zilog (stylized "Z") or AMD (up/right-pointing
arrow) logos on the parts?
Nope, they are Zilog parts.
Joe