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/* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved.
*
* displayRegisters.h - i386-specific register helpers
*
*
* HISTORY
* 03 Aug 93 Scott Forstall
* Created.
*/
#import <driverkit/i386/ioPorts.h>
static inline unsigned char IOReadRegister(
IOEISAPortAddress port,
unsigned char index)
/* Description: Read register at port and index. Return the*/
/* current value of the register.*/
{
outb(port, index);
return(inb(port + 1));
}
static inline void IOWriteRegister(
IOEISAPortAddress port,
unsigned char index,
unsigned char value)
/* Description: Write value to register at port and index.*/
{
outb(port, index);
outb(port + 1, value);
}
static inline void IOReadModifyWriteRegister(
IOEISAPortAddress port,
unsigned char index,
unsigned char protect,
unsigned char value)
/* Description: Read-modify-write.*/
/* Read register at port and index. Change value while*/
/* retaining protect bits.*/
{
unsigned char val = IOReadRegister(port, index);
IOWriteRegister(port, index, (val & protect) | value);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.