Re: X problem on PMAGB-B

[Michael <macallan1888%gmail.com@localhost>]

Hello,

On Sun, 16 Nov 2025 23:39:18 -0500
Dave McGuire <mcguire%neurotica.com@localhost> wrote:

>    But there is a strange offset to the video.  I've attached two pics 
> which show what I mean.  See where my pointer has grabbed the window 
> title bar in the second picture; I've actually grabbed the window and am 
> dragging it, so that's where the X server thinks the window is.  But the 
> actual displayed objects are shifted to the left.

Hmm, sfb_common_init() adds another 4096 to the VRAM address, let's do
the same:

Index: sfb.c
===================================================================
RCS file: /cvsroot/src/sys/dev/tc/sfb.c,v
retrieving revision 1.89
diff -u -w -r1.89 sfb.c
--- sfb.c       6 Dec 2021 16:00:07 -0000       1.89
+++ sfb.c       17 Nov 2025 10:45:52 -0000
@@ -485,9 +485,9 @@
 {
        struct sfb_softc *sc = v;
 
-       if (offset >= SFB_SIZE || offset < 0)
+       if (offset >= SFB_FB_SIZE || offset < 0)
                return (-1);
-       return machine_btop(sc->sc_vaddr + offset);
+       return machine_btop(sc->sc_vaddr + SFB_FB_OFFSET + 4096 + offset);
 }

have fun
Michael