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Remove 0376 >label BkgPenCol from vf-sys-x16.fth

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and update RELEASE_NOTES.md accordingly.
This commit is contained in:
Philip Zembrod 2024-07-01 23:52:48 +02:00
parent 1bd0d81138
commit e73e4bc6d4
2 changed files with 14 additions and 4 deletions
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17
6502/C64/RELEASE_NOTES.md
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@ -66,11 +66,11 @@ C64 Releases. As of now (June 2024), the different VolksForth platforms
### 6502-C64 3.9.6 - in preparation
Several dependencies of the VolksForth kernel on X16 Kernal variable addresses
The known dependencies of the VolksForth kernel
on X16 Kernal variable addresses
and thus likely breakage points with new Kernal release were replaced with
Kernal API calls, so the VolksForth kernel should now be much more robust
when the X16 Kernal changes. The only remaining Kernal variable used is
$0376 - BkgPenCol.
when the X16 Kernal changes.
* Clearing the IOStatus is now possible through the ExtApi call ($FEAB, thanks
to mooinglemur for implementing this), so the dependency on the address of
@ -88,6 +88,17 @@ $0376 - BkgPenCol.
* Likewise the clearing of the Kernal variables QtSw and Insrt after each
char written to the console via CHROUT: It was removed from the X16 variant
as it shouldn't be necessary.
* Up to version 3.9.5, the VolksForth kernel used BkgPenCol (X16: $0376)
to set both background and pen color during initialization. It would be
great ot have e.g. an ExtApi function to set BkgPenCol, similar to the
X16 BASIC command `COLOR`. I'm planning to suggest this,
but for the time being setting the background and pen color is
instead done via PETSCII control codes instead. To reflect this change,
the CBM VolksForth word `INK-POT` has been renamed to `X16-INK-POT`,
and it contains only 3 values (border color code, background color PETSCII
control charcter, pen color PETSCII control character. This removes the
dependency on BkgPenCol and thereby on the last remaining Kernal variable
that was used by VolksForth.
The cooperative multitasker was extracted from the original disk 3 (see
[`disks/vforth4_3.fth`](https://github.com/forth-ev/VolksForth/blob/master/6502/C64/disks/vforth4_3.fth))

1
6502/C64/src/vf-sys-x16.fth
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@ -9,7 +9,6 @@ include vf-lbls-cbm.fth
0febd >label KbdbufPeek
0feab >label ExtApi
09f2c >label BrdCol
0376 >label BkgPenCol \ aka color
\ I'm tentatively removing QtSw & Insrt from the X16 variant;
\ see comment at the top of vf-sys-cbm.fth
\ 0381 >label QtSw