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Source Code 1992 March
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Source_Code_CD-ROM_Walnut_Creek_March_1992.iso
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msdos
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desqview
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dvglue10.arc
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DVVER.C
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C/C++ Source or Header
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1988-08-10
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46 lines
/*====================================================*/
/* DVVER.C */
/* */
/* (c) Copyright 1988 Ralf Brown All Rights Reserved */
/* May be freely copied for noncommercial use, */
/* provided that this copyright notice remains intact */
/* and any changes are clearly indicated in the */
/* comment blocks preceding functions */
/*====================================================*/
#include "tvapi.h"
/*======================================================*/
/* DVver--return DESQview version, -1 if not loaded */
/* Ralf Brown 4/3/88 */
/*======================================================*/
WORD pascal DVver(void)
{
#ifdef __TURBOC__
_AX = 0x2B01 ;
_CX = 0x4445 ;
_DX = 0x5351 ;
geninterrupt(0x21);
if (_AL == 0xFF)
return -1 ;
else if (_BX == 2) /* early copies of 2.00 return 2 rather than 0x0200 */
return 0x0200 ;
else return _BX ;
#else
union REGS regs ;
regs.x.ax = 0x2B01 ;
regs.x.cx = 0x4445 ;
regs.x.dx = 0x5351 ;
int86(0x21,®s,®s) ;
if (regs.h.al == 0xFF)
return -1 ;
else if (regs.x.bx == 2)
return 0x0200 ;
else return regs.x.bx ;
#endif __TURBOC__
}
/* End of DVVER.C */