Hi,

I'm researching the CATCH / THROW / ABORT matter...
I'm using SwiftX for the AVR. I've searched in the 3 manuals: Forth
handbook, SwiftX, SwiftX-AVR.

I can't answers to the following questions:
1. Where does the Exception Stack reside? Within a task? and if so, is
there a difference between background and terminal task.
2. ABORT returns to the task's default Idle behavior; how is the default
behavior determined? (background task?)
3. What is a common implementation for a default exception-handler on a
task? The following?
: TASK_START ( exception-routine-addr task-routine-addr task-addr -- )
ACTIVATE \ activate task
BEGIN
DUB CATCH \ execute the task-routine
IF OVER EXECUTE \ error throwed : execute exception routine
ELSE NOD \ no error throwed : stop task
THEN
AGAIN
;

Thanks in advance,
Frank Boon
Metatronics.

PS1: Is the SCRATCH-pointer in the AVR-SWIFTX (Z, R30/R31) solely for my
own use?
PS2: page 22 in 'Swiftx.pdf' has an anchor "Section 4.7 (”Exceptions and
Error Handling”)" to '/swiftforth manual/programming.pdf' which I don't
have... documentation-error?
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Received on Sun Dec 05 2004 - 05:58:14 PST