15 Jul
2005
15 Jul
'05
9:07 a.m.
I have a few boot roms in a 9312 bootstrap terminator that I can't identify.
The manual lists most boot roms, but these particular ones are not listed in
the manual I have. Anyone know?
760A9 - PR - PC05 (this one I could find in the docs)
786A9 no clue
788A9 no clue
787A9 no clue
I'm hoping one of them is an RL02 rom :\
Jay West
15 Jul
15 Jul
11:43 a.m.
On Friday 15 July 2005 09:07, Jay West wrote:
I have a few boot roms in a 9312 bootstrap terminator
that I can't
identify. The manual lists most boot roms, but these particular ones are
not listed in the manual I have. Anyone know?
760A9 - PR - PC05 (this one I could find in the docs)
786A9 no clue
788A9 no clue
787A9 no clue
I'm hoping one of them is an RL02 rom :\
Jay West
Have the chips in your M9312 and:
Load and Examine 773000, 773200, 773400 and 773600 (for each Prom address):
The first three digits:
040=A
041=C
042=D
...
046=M
..
050=P
The final 7 bits are ASCII:
ex.,
60=0
...
111=I
112=J
113=K
114=l
...
124=T
etc.
Ex: 042114=DL
You should be able to ID any M9312 PROM in this fashion.
Lyle
--
Lyle Bickley
Bickley Consulting West Inc.
Mountain View, CA
http://bickleywest.com
"Black holes are where God is dividing by zero"
7:23 p.m.
Lyle wrote....
Load and Examine 773000, 773200, 773400 and 773600
(for each Prom
address):
The first three digits:
040=A
041=C
042=D
Oh Neat! I did read a section in the M9312 manual which shows a list of the
contents of location 773000, 773200, 773400, 773600 and shows what rom those
values are for. However, they don't say in the manual that they are ascii, I
figured it was just some unique word (checksum or somesuch) at the beginning
and hence wouldn't be a good technique to see what any (unlisted) boot prom
was for. I should have noticed :> Thanks for pointing this out!
Jay West
7:34 p.m.
On Friday 15 July 2005 19:23, Jay West wrote:
Lyle wrote....
Yes, it's interesting that it isn't documented (at least anywhere I could
find.) What's weird is that the first three digits are "coded" and the last
7 bits are ASCII. Probably has something to do with the way the PROMS are 4
bit "compressed" format or something. I just happened upon the decoding
"scheme" while trying to figure out what a bunch of PROMS were that I
had. ;-)
Lyle
--
Lyle Bickley
Bickley Consulting West Inc.
Mountain View, CA
http://bickleywest.com
"Black holes are where God is dividing by zero"
Load and Examine 773000, 773200, 773400 and
773600 (for each Prom
address):
The first three digits:
040=A
041=C
042=D
Oh Neat! I did read a section in the M9312 manual which shows a list of the
contents of location 773000, 773200, 773400, 773600 and shows what rom
those values are for. However, they don't say in the manual that they are
ascii, I figured it was just some unique word (checksum or somesuch) at the
beginning and hence wouldn't be a good technique to see what any (unlisted)
boot prom was for. I should have noticed :> Thanks for pointing this out!
Jay West
7099
days inactive
7100
days old
3 comments
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jwest＠classiccmp.org -
lbickley＠bickleywest.com