Date: Tue, 19 Nov 1996 17:42:23 +0900 (JST) From: ohki@gssm.otsuka.tsukuba.ac.jp To: FreeBSD-gnats-submit@freebsd.org Subject: i386/2058: amity series machines can not show installation menu Message-ID: <199611190842.RAA07432@smri01.gssm.otsuka.tsukuba.ac.jp> Resent-Message-ID: <199611190850.AAA23578@freefall.freebsd.org>
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>Number: 2058
>Category: i386
>Synopsis: amity series machines can not show installation menu
>Confidential: yes
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Tue Nov 19 00:50:01 PST 1996
>Last-Modified:
>Originator: Atsuo Ohki
>Organization:
GSSM, Univ. of Tsukuba, otsuka, tokyo, japan
>Release: FreeBSD 2.2-ALPHA
>Environment:
Mitsubish Amity series Pen Computer (amity/vc, amity/sp)
FreeBSD-961014-SNAP and later
>Description:
After booting the machine with boot.flp,
Installation menu should be displayed on the screen,
but the screen is filled with meaningless color patches.
>How-To-Repeat:
Just boot the machine with boot.flp
(of 2.2-961014-SNAP or later)
>Fix:
Video mode map tables of Mitsubishi Amity series machines
are somehow different from other DOS machines.
In order to make M_VGA_C80x25 mode works (at least),
video_mode_ptr (fetched by scinit()) should be adjusted
via boot configuration or kernel configuration time.
Following context diff supports:
boot configuration:
via id_flags of sc0 (bit 8 to bit 11)
kernel configuration:
options "VIDEO_MODE_OFFSET=x"
where x=7 for amity/sp, x=5 for amity/vc
--- syscons.h Tue Nov 12 18:08:00 1996
+++ syscons.h-new Mon Nov 18 17:50:04 1996
@@ -71,6 +71,7 @@
#define CHAR_CURSOR 0x00004
#define DETECT_KBD 0x00008
#define XT_KEYBD 0x00010
+#define VIDEO_OFF(x) ((x) >> 8)
/* attribute flags */
#define NORMAL_ATTR 0x00
--- syscons.c Tue Nov 19 17:28:49 1996
+++ syscons.c-new Tue Nov 19 17:29:09 1996
@@ -102,6 +102,7 @@
static default_attr *current_default;
static int flags = 0;
static char init_done = COLD;
+static char vmp_modified = 0; /* XXX */
static u_short sc_buffer[ROW*COL];
static char switch_in_progress = FALSE;
static char write_in_progress = FALSE;
@@ -383,6 +384,14 @@
#endif
scinit();
+#if 1 /* local modification */
+ if (!vmp_modified && video_mode_ptr != NULL) {
+ int off = VIDEO_OFF(dev->id_flags);
+ if (off & 0x10) off |= ~0x0f;
+ video_mode_ptr -= off * 64;
+ vmp_modified = 1;
+ }
+#endif
flags = dev->id_flags;
scp = console[0];
@@ -883,6 +892,10 @@
if (!crtc_vga || video_mode_ptr == NULL)
return ENXIO;
+#ifdef VIDEO_MODE_OFFSET
+ if ((cmd & 0xff) < VIDEO_MODE_OFFSET)
+ return ENXIO;
+#endif
switch (cmd & 0xff) {
case M_VGA_C80x60: case M_VGA_M80x60:
if (!(fonts_loaded & FONT_8))
@@ -2331,6 +2344,11 @@
pa = (((segoff & 0xffff0000) >> 12) + (segoff & 0xffff));
if (ISMAPPED(pa, 64))
video_mode_ptr = (char *)pa_to_va(pa);
+#ifdef VIDEO_MODE_OFFSET
+ if (video_mode_ptr != NULL)
+ video_mode_ptr -= (VIDEO_MODE_OFFSET)*64;
+ vmp_modified = 1;
+#endif
}
}
current_default = &user_default;
>Audit-Trail:
>Unformatted:
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