Same MPU, different proms

[peter paul fenske]

Howday Mike and the rest of the gang.

In the last two bytes of a motorola address space is the
jump vector for reset. 

in a 16k eprom this is usually $C800 or so
In a 32K eprom this is usually $A000 or so
Yes copy a 16k image to the high side of a 32k eprom
and all is fine

gn:peter

At 11:24 PM 5/13/98 EDT, you wrote:
>I'd like it if anyone can shed some light on the issue
>for us newer members...
>If I go to the boneyard and find a 7749 ECM from a
>Quad-4, it will have a 256k prom in the carrier.
>If I get a 7749 from a Turbo Sunbird, it will have a 128k prom...
>How does the  ECM know where to load the prom into memory?
>It the answer in the other chip(s) in the carrier?
>Thanks,
>Mike V
>
>