reset vector on a 68hc11

David Cooley n5xmt at bellsouth.net
Fri Jun 25 14:49:27 GMT 1999


At 10:36 AM 6/25/99 -0400, you wrote:
>Hi all:
>
> This may seem like a simple question but here goes, this is the last line 
>of the 
>bin file I'm looking at:
>000003ff0:  60 00 A1 DA A1 F7 60 00  A0 00 A0 00 A0 00 A0 00
`.....`.........
>
>the a0's are the reset vector right? is that a relative or absolute jump.
>ie does the reset jump to 3f58 ( 3ff0 - a0) or to 20a0 ( A0 + 2000)

Depends...  Reset vector should be at address FFFE-FFFF... is this prom
mapped so it's address 3FFE-3FFF is actually the processors FFFE-FFFF?
If not, the reset vectors are contained in onboard ROM or the CPU's
embedded ROM.
If this was really the FFFE-FFFF in the CPU, the A000 would be the absolute
address of the beginning of the reset code.
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