> What happens to the PIC 873 with a stack underflow?
> Where does it program counter reset to?
>
PIC uses a hardware stack, which is organized as a circular buffer. On stack
underflow/overflow, the stack pointer symply wrap arounds. The program
counter is then set to whatever the stack pointer points to, e.g. some old
(invalid) return address.

Frank

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GSP Sprachtechnologie GmbH
Frank Wollenberg
HW-Entwicklung
Tel.:   +49 (0)30 769929-78
Fax:    +49 (0)30 769929-12
eMail:  f.wollenberg@gsp-berlin.de


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GSP Sprachtechnologie GmbH
Teltowkanalstr.1, D-12247 Berlin
Tel.:  +49 (0)30 769929-0
Fax:   +49 (0)30 769929-12
eMail: Info@gsp-berlin.de
Web:   http://www.gsp-berlin.de

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