31 Jul
2013
31 Jul
'13
8:05 p.m.
On Wed, Jul 31, 2013 at 06:58:20PM +0200, Holm Tiffe wrote:
I was born in east germany, therefore I had russian in
the school (35 years
before now), but this is almost all gone.
Oh man I'd heard that. I visited East Berlin 25 years ago with some friends,
one of whom was from Russia, and he had a bit too much fun asking questions
in Russian because he knew everyone had been forced to learn Russian in
school. It was especially silly since he'd taken German in school here in
ths US, but obviously Russian was still easier for him.
As for the 1801/1806VM2 I can say at first that it has
some additional
select signals to address an console mode rom. The processor don't has the
ODT in Microcode but in this (shadow)rom. (I have the contents from this
rom).
Mext detail is an adressless read after startup, the processor reads in
some bits to determine the starting address of this console rom.
Nice -- this is exactly the kind of thing that's never going to be obvious
from the pinouts and timing charts, and it's hard
to understand in schematics
for existing devices (you can see what they're doing
but not why).
I do even have the internal schematics of that CPU,
just in case
you have some open questions.. *evil grin*
Sweet!
John Wilson
D Bit