From c17fa8e92a428fc35f2422b796caceeb748ee795 Mon Sep 17 00:00:00 2001
From: John Tsiombikas <nuclear@member.fsf.org>
Date: Sat, 17 Sep 2022 17:53:36 +0300
Subject: [PATCH 1/1] initial commit

---
 .gitignore  |    7 +++++++
 Makefile    |   42 ++++++++++++++++++++++++++++++++++++++++++
 src/main.c  |   22 ++++++++++++++++++++++
 src/video.c |   10 ++++++++++
 src/video.h |    6 ++++++
 5 files changed, 87 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 src/main.c
 create mode 100644 src/video.c
 create mode 100644 src/video.h

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f784744
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+*.obj
+*.swp
+*.exe
+*.lnk
+*.occ
+*.err
+*.map
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..58ff52f
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,42 @@
+!ifdef __UNIX__
+obj = src/main.obj src/video.obj
+!else
+obj = src\main.obj src\video.obj
+!endif
+bin = dosplash.exe
+
+warn = -w=3
+dbg = -d3
+
+CC = wcc
+LD = wlink
+CFLAGS = $(warn) $(dbg) $(opt) $(def) -zq -bt=dos -ml
+
+$(bin): $(obj)
+	%write obj.lnk $(obj)
+	$(LD) debug all option map name $@ system dos file { @obj }
+
+.c: src
+.asm: src
+
+cflags.occ: Makefile
+	%write $@ $(CFLAGS)
+
+.c.obj: .autodepend
+	$(CC) -fo=$@ @cflags.occ $[*
+
+.asm.obj:
+	nasm -f obj -o $@ $[*.asm
+
+!ifdef __UNIX__
+clean: .symbolic
+	rm -f $(obj)
+	rm -f $(bin)
+	rm -f cflags.occ obj.lnk
+!else
+clean: .symbolic
+	del *.obj
+	del obj.lnk
+	del cflags.occ
+	del $(bin)
+!endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..9c5cd90
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <conio.h>
+#include <dos.h>
+#include "video.h"
+
+int main(int argc, char **argv)
+{
+	set_video_mode(0x13);
+
+	memset(MK_FP(0xa000, 0), 4, 64000);
+
+	for(;;) {
+		if(kbhit()) {
+			if(getch() == 27) break;
+		}
+	}
+
+	set_video_mode(3);
+	return 0;
+}
diff --git a/src/video.c b/src/video.c
new file mode 100644
index 0000000..e17f1f7
--- /dev/null
+++ b/src/video.c
@@ -0,0 +1,10 @@
+#include <dos.h>
+#include "video.h"
+
+void set_video_mode(int mode)
+{
+	union REGS regs = {0};
+
+	regs.x.ax = mode;
+	int86(0x10, &regs, &regs);
+}
diff --git a/src/video.h b/src/video.h
new file mode 100644
index 0000000..28725bd
--- /dev/null
+++ b/src/video.h
@@ -0,0 +1,6 @@
+#ifndef VIDEO_H_
+#define VIDEO_H_
+
+void set_video_mode(int mode);
+
+#endif	/* VIDEO_H_ */
-- 
1.7.10.4