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From: minforth <minforth@gmx.net>
Newsgroups: comp.lang.forth
Subject: Re: Parsing timestamps?
Date: Sat, 5 Jul 2025 16:24:37 +0200
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Am 05.07.2025 um 14:41 schrieb minforth:
> Am 05.07.2025 um 14:21 schrieb albert@spenarnc.xs4all.nl:
>> I investigated the instruction set, and I found no way to detect
>> if the 8 registers stack is full.
>> This would offer the possibility to spill registers to memory only
>> if it is needed.
>>
> 
> IIRC signaling and handling fp-stack overflow is not an easy task.
> At most, the computer would crash.
> IOW, spilling makes sense.

A deep dive into the manual

... the C1 condition code flag is used for a variety of functions.
When both the IE and SF flags in the x87 FPU status word are set,
indicating a stack overflow or underflow exception (#IS), the C1
flag distinguishes between overflow (C1=1) and underflow (C1=0).