Re: Amiga screen modes in wscons
Carlos Milán Figueredo <[email protected]> Fri, 10 Nov 2023 16:38:57 +0000
| Newsgroups | gmane.os.netbsd.ports.amiga |
|---|---|
| Message-ID | <CO6P220MB05644687987D6CACA10FCA0CC9AEA@CO6P220MB0564.NAMP220.PROD.OUTLOOK.COM> |
Hi Michael!=0A= =0A= From: [email protected] <[email protected]> on behalf o= f Michael van Elst <[email protected]>=0A= Sent: Friday, November 10, 2023 13:49=0A= =A0=0A= >>Hi everyone!=0A= >>Is there a way to change the screen mode used by wscons at boot time?=0A= =0A= >I don't think so.=0A= =0A= Thanks to your guidance I understand why :)=0A= =0A= > It's possible that a kernel compiled without option GRF_AGA_VGA=0A= > works better for you.=0A= =0A= That would probably have the same effect as not using -A (that works well f= or me), without leaving behind AGA support, it would be a nice solution. I = will give a try to compile my own kernel.=0A= =0A= > The code for setting up the graphics is in sys/arch/amiga/dev/grfabs_cc.c= :=0A= =0A= > /* static, so I can patch and play */=0A= =0A= > #ifdef GRF_AGA_VGA=0A= > int=A0=A0=A0=A0 pAGA_htotal=A0 =3D 0x079;=0A= > int=A0=A0=A0=A0 pAGA_vtotal=A0 =3D 0x24d;=0A= > int=A0=A0=A0=A0 pAGA_vbstop=A0 =3D 0x019;=0A= > int=A0=A0=A0=A0 pAGA_hcenter =3D 0x04b;=0A= > #else=0A= > int=A0=A0=A0=A0 pAGA_htotal=A0 =3D 0x081;=0A= > int=A0=A0=A0=A0 pAGA_vtotal=A0 =3D 0x23d;=0A= > int=A0=A0=A0=A0 pAGA_vbstop=A0 =3D 0x017;=0A= > int=A0=A0=A0=A0 pAGA_hcenter =3D 0x04f;=0A= > #endif=0A= > int=A0=A0=A0=A0 pAGA_hsstrt=A0 =3D 0x00f;=0A= > int=A0=A0=A0=A0 pAGA_hsstop=A0 =3D 0x019;=0A= > int=A0=A0=A0=A0 pAGA_hbstrt=A0 =3D 0x001;=0A= > int=A0=A0=A0=A0 pAGA_hbstop=A0 =3D 0x021;=0A= > int=A0=A0=A0=A0 pAGA_vsstrt=A0 =3D 0x001;=0A= > int=A0=A0=A0=A0 pAGA_vsstop=A0 =3D 0x008;=0A= > int=A0=A0=A0=A0 pAGA_vbstrt=A0 =3D 0x000;=0A= =0A= > So you could also patch the kernel binary instead of recompiling.=0A= =0A= This is really nice! I can probably solve the problem without giving up the= GRF_AGA_VGA playing a bit with htotal and hcenter, just enough to get the = column I am not able to display. However I have no clue on how to apply the= patch to the binary file. I think I can compile my own kernel with differe= nt values and make a diff with the original one, but is there an easier way= or documented procedure?=0A= =0A= Regards,=0A= Carlos=