2 May
2012
2 May
'12
3 p.m.
Pete Turnbull wrote:
Yes I know, but not 20 Mhz, 5Mhz they really have.
The russians made faster CPUs long time ago (K1801VM2 for example, runs at
10 (Clock 20) but has no MMU).
Regards,
Holm
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On 02/05/2012 11:16, Holm Tiffe wrote:
Yes, you are right. Don't know what's wrong with my own brain this time...
Pete Turnbull wrote:
Yes, it is.
See
http://www.dunnington.u-net.com/public/DECROMs for more.
Is that your site? Here are the Images:
Thanks! I'll upload them and edit the list later.
...looked at the data(cat 23-395E5.bin
23-396E5.bin >all.bin and vis versa)
that looks that they have mangled adress/data lines somewhat, nothing
readably there..
Same on the 23-168E5.bin and 23-169E5.bin that appears to be on Olegs
board. (see below)
They're low-byte and high-byte of 16-bit words, so unless you merge
them, it will look a little odd :-) So I'm soldered an 18,432Mhz Xtal in
(haven't found 18.00 in my
stock jet) and at least the continous selftest from the ROMs is running
flawlessly (~860 passes w/o Error).
Map is displaying 18.429 MHz CPU Options: FPA.
I did that to two of mine, but one had to be downgraded again because
although it ran OK on it's own, it gave mysterious errors with real
software on a real system.
The design speed of the J11 was originally 20MHz, but it was a long time
(years) before DEC got any that would actually meet that spec under all
conditions.
--
Pete Peter Turnbull
Network Manager
University of York