[src/trunk]: src/sys/arch/atari/pci Replace CRTC register values with ones ta...

[tsutsui <tsutsui%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2369e6f78b0b
branches:  trunk
changeset: 829384:2369e6f78b0b
user:      tsutsui <tsutsui%NetBSD.org@localhost>
date:      Sun Jan 28 14:22:23 2018 +0000

description:
Replace CRTC register values with ones taken from sys/dev/ic/vga_subr.c.

This fixes noise around column 3 and 4 and makes screen output clearer
on Milan with S3 Trio64V.

diffstat:

 sys/arch/atari/pci/pci_milan.c |  40 +++++++++++++++++++++++++++++++---------
 1 files changed, 31 insertions(+), 9 deletions(-)

diffs (67 lines):

diff -r a55c3c858e71 -r 2369e6f78b0b sys/arch/atari/pci/pci_milan.c
--- a/sys/arch/atari/pci/pci_milan.c    Sun Jan 28 13:37:39 2018 +0000
+++ b/sys/arch/atari/pci/pci_milan.c    Sun Jan 28 14:22:23 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pci_milan.c,v 1.14 2015/10/02 05:22:50 msaitoh Exp $   */
+/*     $NetBSD: pci_milan.c,v 1.15 2018/01/28 14:22:23 tsutsui Exp $   */
 
 /*-
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pci_milan.c,v 1.14 2015/10/02 05:22:50 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pci_milan.c,v 1.15 2018/01/28 14:22:23 tsutsui Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -120,19 +120,41 @@
 
 /*
  * VGA related stuff...
- * XXX: Currently, you can only boot the Milan through loadbsd.ttp, hence the
- *      text mode ;-)
+ *  
  * It looks like the Milan BIOS is initializing the VGA card in a reasonably
  * standard text mode. However, the screen mode is 640*480 instead of 640*400.
  * Since wscons does not handle the right by default, the card is reprogrammed
  * to 640*400 using only 'standard' VGA registers (I hope!). So this ought to
  * work on cards other than the S3Trio card I have tested it on.
  */
-static u_char crt_tab[] = {
-       0x60, 0x53, 0x4f, 0x14, 0x56, 0x05, 0xc1, 0x1f,
-       0x00, 0x4f, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00,
-       0x98, 0x3d, 0x8f, 0x28, 0x0f, 0x8f, 0xc1, 0xc3,
-       0xff };
+static const uint8_t crt_tab[] = {
+       /* taken from vga_crtc[] in sys/dev/ic/vga_subr.c */
+       0x5f,   /* 00: horizontal total */
+       0x4f,   /* 01: horizontal display-enable end */
+       0x50,   /* 02: start horizontal blanking */
+       0x82,   /* 03: display skew control / end horizontal blanking */
+       0x55,   /* 04: start horizontal retrace pulse */
+       0x81,   /* 05: horizontal retrace delay / end horizontal retrace */
+       0xbf,   /* 06: vertical total */
+       0x1f,   /* 07: overflow register */
+       0x00,   /* 08: preset row scan */
+       0x4f,   /* 09: overflow / maximum scan line */
+       0x0d,   /* 0A: cursor off / cursor start */
+       0x0e,   /* 0B: cursor skew / cursor end */
+       0x00,   /* 0C: start regenerative buffer address high */
+       0x00,   /* 0D: start regenerative buffer address low */
+       0x00,   /* 0E: cursor location high */
+       0x00,   /* 0F: cursor location low */
+       0x9c,   /* 10: vertical retrace start */
+       0x8e,   /* 11: vertical interrupt / vertical retrace end */
+       0x8f,   /* 12: vertical display enable end */
+       0x28,   /* 13: logical line width */
+       0x00,   /* 14: underline location */
+       0x96,   /* 15: start vertical blanking */
+       0xb9,   /* 16: end vertical blanking */
+       0xa3,   /* 17: CRT mode control */
+       0xff    /* 18: line compare */
+};
 
 /*
  * XXX: Why are we repeating this everywhere! (Leo)