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-rw-r--r--loader/kon2/src/display/s3.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/loader/kon2/src/display/s3.c b/loader/kon2/src/display/s3.c
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+++ b/loader/kon2/src/display/s3.c
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+/*
+ * KON2 - Kanji ON Console -
+ * Copyright (C) 1992-1996 Takashi MANABE (manabe@papilio.tutics.tut.ac.jp)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TAKASHI MANABE ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+/*
+ This code is based on vgalib.
+
+ Thanks to frandsen@diku.dk (Tommy Frandsen).
+ */
+
+#include <config.h>
+
+#ifndef MINI_KON
+
+#ifdef HAS_VGA
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <linux/mm.h>
+#include <sys/kd.h>
+#undef free
+#include <stdlib.h>
+
+#include <mem.h>
+#include <getcap.h>
+#include <defs.h>
+#include <errors.h>
+#include <vc.h>
+#include <vt.h>
+#include <vga.h>
+#include <fnld.h>
+
+#define R5x_MASK 0x7737
+
+union s3Regs {
+ struct {
+ u_char r3[10];/* Video Atribute (CR30-34, CR38-3C) */
+ u_char rx[33];/* Video Atribute (CR40-65) */
+ } x;
+ struct {
+ u_char
+ x30, x31, x32, x33, x34,
+ x38, x39, x3a, x3b, x3c;
+ u_char
+ x40, x41, x42, x43, x44, x45, x46, x47,
+ x48, x49, x4a, x4b, x4c, x4d, x4e, x4f,
+ x50, x51, x53, x54, x55, x58, x59, x5a, x5c, x5d, x5e,
+ x60, x61, x62, x63, x64, x65;
+ } r;
+} s3Text, s3Graph;
+
+static
+ void S3SetRegisters(union s3Regs *regs)
+{
+ int i, n;
+
+ PortOutw(0xa539, vgaCrtAddr); /* unlock system control regs */
+ for (i = 0; i < 5; i ++) {
+ PortOutb(0x30 + i, vgaCrtAddr);
+ PortOutb(regs->x.r3[i], vgaCrtData);
+ PortOutb(0x38 + i, vgaCrtAddr);
+ PortOutb(regs->x.r3[5+i], vgaCrtData);
+ }
+ for (i = 0; i < 16; i ++) {
+ PortOutb(0x40 + i, vgaCrtAddr);
+ PortOutb(regs->x.rx[i], vgaCrtData);
+ }
+ for (n = 16, i = 0; i < 16; i ++) {
+ if ((1 << i) & R5x_MASK) {
+ PortOutb(0x50 + i, vgaCrtAddr);
+ PortOutb(regs->x.rx[n], vgaCrtData);
+ n ++;
+ }
+ }
+ for (i = 0; i < 6; i ++, n ++) {
+ PortOutb(0x60 + i, vgaCrtAddr);
+ PortOutb(s3Text.x.rx[n], vgaCrtData);
+ }
+}
+
+static
+ void S3SetStartAddress(void)
+{
+ u_int til;
+
+ PortOutb(0x31, vgaCrtAddr);
+ PortOutb(((gramHead & 0x030000) >> 12) | s3Graph.r.x31, vgaCrtData);
+ s3Graph.r.x51 &= ~0x03;
+ s3Graph.r.x51 |= ((gramHead & 0x040000) >> 18);
+ PortOutb(0x51, vgaCrtAddr);
+ /* Don't override current bank selection */
+ PortOutb((PortInb(vgaCrtData) & ~0x03)
+ | ((gramHead & 0x40000) >> 18), vgaCrtData);
+
+ PortOutw((gramHead & 0xFF00) | 0x0c, vgaCrtAddr);
+ PortOutw(((gramHead & 0x00FF) << 8) | 0x0d, vgaCrtAddr);
+
+ til = dInfo.gydim - 1 - (gramHead / dInfo.glineByte);
+ PortOutw((til << 8) | 0x18, vgaCrtAddr);
+ PortOutw(((til & 0x100) << 4) | LineComp8, vgaCrtAddr);
+ PortOutw(((til & 0x200) << 5) | LineComp9, vgaCrtAddr);
+ PortOutw(0x8d31, vgaCrtAddr); /* unlock system control regs */
+}
+
+static
+ void S3TextMode(void)
+{
+ VgaTextMode();
+ S3SetRegisters(&s3Text);
+}
+
+static
+ void S3CalcNewRegs(union videoTimings *video)
+{
+ regGraph.mis |= 0x0D;
+/* regGraph.crt[19] = 0xA0;*/
+/* regGraph.crt[20] = 0xA0;*/
+ regGraph.crt[23] = 0xE3;
+/* regGraph.crt[24] = 0;*/
+ s3Graph.r.x5e = (((video->m.vTotal - 2) & 0x400) >> 10)
+ | (((video->m.vLine - 1) & 0x400) >> 9)
+ | ((video->m.vStart & 0x400) >> 8)
+ | ((video->m.vStart & 0x400) >> 6) | 0x40;
+ s3Graph.r.x5d = ((video->m.hTotal & 0x800) >> 11)
+ | ((video->m.hDot & 0x800) >> 10)
+ | ((video->m.hStart & 0x800) >> 9)
+ | ((video->m.hStart & 0x800) >> 7);
+}
+
+static
+ void S3GraphMode(void)
+{
+/* s3Graph.r.x35 = s3Text.r.x35 & 0xF0;*/
+#if 1
+ s3Graph.r.x5c = 0x20;
+ s3Graph.r.x31 = 0x8D;
+ s3Graph.r.x32 = 0;
+ s3Graph.r.x33 = 0x20;
+ s3Graph.r.x34 = 0x10;
+/* s3Graph.r.x35 = 0;*/
+/* s3Graph.r.x3a = 0x95;*/
+ s3Graph.r.x3b = (regGraph.crt[0] + regGraph.crt[4] + 1) / 2;
+ s3Graph.r.x3c = regGraph.crt[0] / 2;
+ s3Graph.r.x40 = (s3Text.r.x40 & 0xF6) | 1;
+ s3Graph.r.x43 = s3Text.r.x44 = 0;
+ s3Graph.r.x45 = s3Text.r.x45 & 1;
+
+ s3Graph.r.x50 = s3Text.r.x50 & ~0xC1;
+ s3Graph.r.x51 = (s3Text.r.x51 & 0xC0) | ((dInfo.gxdim >> 7) & 0x30);
+ s3Graph.r.x53 = s3Text.r.x53 & ~0x30;
+ s3Graph.r.x54 = 0xA0;
+ s3Graph.r.x55 = (s3Text.r.x55 & 8) | 0x40;
+ s3Graph.r.x58 = 0;
+ s3Graph.r.x5d |= s3Graph.r.x5d & ~0x17;
+ s3Graph.r.x60 = 0x3F;
+ s3Graph.r.x61 = 0x81;
+ s3Graph.r.x62 = 0;
+ if (dInfo.gxdim < 800) {
+ s3Graph.r.x50 |= 0x40;
+ s3Graph.r.x42 = 0xb;
+ } else if (dInfo.gxdim < 1024) {
+ s3Graph.r.x50 |= 0x80;
+ s3Graph.r.x42 = 2;
+ } else {
+ s3Graph.r.x42 = 0xE;
+ }
+ VgaGraphMode();
+#endif
+ S3SetRegisters(&s3Graph);
+}
+
+static
+ void S3Init()
+{
+ int i, n;
+
+ PortOutw(0xa539, vgaCrtAddr); /* unlock system control regs */
+/* PortOutw(0x483b, vgaCrtAddr); /* unlock system control regs */
+ for (i = 0; i < 5; i ++) {
+ PortOutb(0x30 + i, vgaCrtAddr);
+ s3Text.x.r3[i] = PortInb(vgaCrtData);
+ PortOutb(0x38 + i, vgaCrtAddr);
+ s3Text.x.r3[i+5] = PortInb(vgaCrtData);
+ }
+ for (i = 0; i < 16; i ++) {
+ PortOutb(0x40 + i, vgaCrtAddr);
+ s3Text.x.rx[i] = PortInb(vgaCrtData);
+ }
+ for (n = 16, i = 0; i < 16; i ++) {
+ if ((1 << i) & R5x_MASK) {
+ PortOutb(0x50 + i, vgaCrtAddr);
+ s3Text.x.rx[n] = PortInb(vgaCrtData);
+ n ++;
+ }
+ }
+ for (i = 0; i < 6; i ++, n ++) {
+ PortOutb(0x60 + i, vgaCrtAddr);
+ s3Text.x.rx[n] = PortInb(vgaCrtData);
+ }
+ s3Graph = s3Text;
+ s3Graph.r.x39 = 0xA5;
+ VgaInit();
+}
+
+static struct videoInfo S3Info =
+{
+ TRUE,
+ S3Init,
+ S3TextMode,
+ S3GraphMode,
+ VgaWput,
+ VgaSput,
+ VgaSetCursorAddress,
+ VgaSetAddress,
+ VgaCursor,
+ VgaClearAll,
+ VgaScreenSaver,
+ VgaDetach,
+ S3SetStartAddress,
+ VgaHardScrollUp,
+ VgaHardScrollDown
+ };
+
+int S3SetVideoType(struct videoInfo *info, const char *regs)
+{
+ union videoTimings video;
+
+ *info = S3Info;
+ VgaReadNewRegs(regs, &video);
+ S3CalcNewRegs(&video);
+ if (VgaAttach() < 0) return FAILURE;
+ VgaDefaultCaps();
+ return SUCCESS;
+}
+
+#endif
+#endif
generated by cgit (git 2.34.1) at 2025-09-12 09:51:32 +0000