i n=know you can't see the pin out and its no sub for schematic
but it shows the chip involved in the ROM/MCU interactions.

the SRM and or ROM should have a large data section with stored
patterns for controling stepper motors in precise patterns so i
thought alot of these chips were there for that tasks ... to get
the data for the patterns out to the stepper controlers.

robb

On Mon, 31 Dec 2007 11:24:58 -0500, "robb" wrote:

i n=know you can't see the pin out and its no sub for schematic
but it shows the chip involved in the ROM/MCU interactions.

the SRM and or ROM should have a large data section with stored
patterns for controling stepper motors in precise patterns so i
thought alot of these chips were there for that tasks ... to get
the data for the patterns out to the stepper controlers.

robb

The SRM2016 is a 2K x 8 static RAM. The smaller chips are mostly
common TTL logic - the 74LS377 is an octal D flip-flop.



--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

Peter Bennett wrote:

On Mon, 31 Dec 2007 11:24:58 -0500, "robb" wrote:


i n=know you can't see the pin out and its no sub for schematic
but it shows the chip involved in the ROM/MCU interactions.

the SRM and or ROM should have a large data section with stored
patterns for controling stepper motors in precise patterns so i
thought alot of these chips were there for that tasks ... to get
the data for the patterns out to the stepper controlers.

robb


The SRM2016 is a 2K x 8 static RAM. The smaller chips are mostly
common TTL logic - the 74LS377 is an octal D flip-flop.



The ROM chip is dated 1985 as well as other chips are 1985.

So, I doubt there is any encryption involved.

donald

On Mon, 31 Dec 2007 11:24:58 -0500, "robb" wrote:

i n=know you can't see the pin out and its no sub for schematic
but it shows the chip involved in the ROM/MCU interactions.

the SRM and or ROM should have a large data section with stored
patterns for controling stepper motors in precise patterns so i
thought alot of these chips were there for that tasks ... to get
the data for the patterns out to the stepper controlers.

robb

SRM2016 = 2kx8 Sram
D23256AC = 32kx8 Mask ROM
MAB 8031 AH = 8031 Ecu controller
LM393 = opamp or voltage controller I believe

For the rest goto
www.nteinc.com and look them up.




--
Doors - Dont look at the future in a window.
Walk to a door - Open it, and go there.

http://www.freedoors.org