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VDCIO.C
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C/C++ Source or Header
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1993-08-10
|
754b
|
29 lines
/*
SG C Tools 1.2
(C) 1993 Steve Goldsmith
All Rights Reserved
Compiled with HI-TECH C 3.09 (CP/M-80).
*/
#include <sys.h>
#include <hitech.h>
#include <vdc.h>
/* low level vdc i/o */
uchar invdc(uchar RegNum)
{
outp(vdcStatusReg,RegNum); /* internal vdc register to read */
while ((inp(vdcStatusReg) & 0x80) == 0x00); /* wait for status bit to be set */
return(inp(vdcDataReg)); /* read register */
}
void outvdc(uchar RegNum, uchar RegVal)
{
outp(vdcStatusReg,RegNum); /* internal vdc register to write */
while ((inp(vdcStatusReg) & 0x80) == 0x00); /* wait for status bit to be set */
outp(vdcDataReg,RegVal); /* write register */
}