From: Jonathan Campbell <jonathan@castus.tv>
Date: Wed, 6 Apr 2016 16:25:42 +0000 (-0700)
Subject: same dos/cpu/vga probe for scroll.c
X-Git-Url: http://4ch.mooo.com/gitweb/?a=commitdiff_plain;h=bb3be3ebd67ad43d7b5705efc2b5be70fad01422;p=16.git

same dos/cpu/vga probe for scroll.c

but apparently some function or data structure is making the DGROUP
segment too large for Watcom to swallow :(
---

diff --git a/src/scroll.c b/src/scroll.c
index d5222a50..0c37c8c4 100755
--- a/src/scroll.c
+++ b/src/scroll.c
@@ -64,6 +64,27 @@ void main(int argc, char *argv[])
 	if(argv[1]) bakapee = atoi(argv[1]);
 	else bakapee = 1;
 
+	// DOSLIB: check our environment
+	probe_dos();
+
+	// DOSLIB: what CPU are we using?
+	// NTS: I can see from the makefile Sparky4 intends this to run on 8088 by the -0 switch in CFLAGS.
+	//      So this code by itself shouldn't care too much what CPU it's running on. Except that other
+	//      parts of this project (DOSLIB itself) rely on CPU detection to know what is appropriate for
+	//      the CPU to carry out tasks. --J.C.
+	cpu_probe();
+
+	// DOSLIB: check for VGA
+	if (!probe_vga()) {
+		printf("VGA probe failed\n");
+		return;
+	}
+	// hardware must be VGA or higher!
+	if (!(vga_state.vga_flags & VGA_IS_VGA)) {
+		printf("This program requires VGA or higher graphics hardware\n");
+		return;
+	}
+
 	testcontrolnoisy=0;
 
 	player[0].persist_aniframe=0;