Re: Floating Point Within A Dialog

Many thanks! Last night I discovered that /NDP wasn't sufficient. To =
get my FP check to work, I had to add something like " /NDP 64 FSTACK." =
 I hadn't considered the re-allocation problem. One puzzle: your =
comment says that NDP needs the stack allocated first, but my ordering =
worked (luck of the Irish?).

-----Original Message-----
From: wheath_at_comcast.net [mailto:wheath_at_comcast.net]
Sent: Wednesday, May 04, 2005 4:20 AM
To: sftalk_at_forth.com
Subject: [sftalk] Re: Floating Point Within A Dialog

Not only does the floating point package need to be initialized in every =
callback but the floating point stack also has to be allocated. 'N0 the =
float stack pointer is NOT initialized for callbacks.
However, you don't want to allocate the stack too many times or you run =
out of memory for the callback and get a Dictionary Full error message =
from Swiftforth.
 I use the following successfully,
: INITFP ( - )
  <<F 'N0 @ HERE <> \ see if this callback has been =
initialized yet
           IF 16 FSTACK \ so only once per callback
           THEN /NDP F>> ; \ /ndp needs stack allocated first

The callback has to use this for every message received but some =
messages use the same ram, hence the 'N0 test.
Warren Heath ( wheath at comcast.net )

-------------- Original message --------------=20

> Thanks Gene and Rick. I did try initializing the floating point stack =
=3D=20
> in the callback (no luck) but didn't mention it. Although the the FP =
=3D=20
> package includes an /NDP in an "onenvload:" statement it didn't occur =
to =3D=20
> me that the callback also needed it.=20
>=20
> -----Original Message-----=20
> From: Gene LeFave [mailto:gene_at_tekdata.com]=20
> Sent: Tuesday, May 03, 2005 2:01 PM=20
> To: sftalk_at_forth.com=20
> Subject: [sftalk] Re: Floating Point Within A Dialog=20
>=20

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Received on Wed May 04 2005 - 09:19:45 PDT