More VGA tests (sprinkled with some Borland/Microsoft compatibility dust)

tests/pc/vga/REGS.H

@@ -0,0 +1,27 @@
+#ifdef __TURBOC__
+#define USES_REGS
+#else
+#define USES_REGS union REGS reg; struct SREGS sreg;
+#define _AH reg.h.ah
+#define _AL reg.h.al
+#define _BH reg.h.bh
+#define _BL reg.h.bl
+#define _CH reg.h.ch
+#define _CL reg.h.cl
+#define _DH reg.h.dh
+#define _DL reg.h.dl
+#define _AX reg.x.ax
+#define _BX reg.x.bx
+#define _CX reg.x.cx
+#define _DX reg.x.dx
+#define _SI reg.x.si
+#define _DI reg.x.di
+#define _DS sreg.ds
+#define _ES sreg.es
+#define _SS sreg.ss
+#define geninterrupt(n) int86x(n,&reg,&reg,&sreg)
+#define inport(port) _inpw(port)
+#define inportb(port) _inp(port)
+#define outport(port,data) _outpw(port,data)
+#define outportb(port,data) _outp(port,data)
+#endif