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REGPACK.DEF
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1985-10-19
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33 lines
{->>>>Register Types Definition<<<<----------------------------}
{ }
{ Filename : REGPACK.DEF -- Last Modified 10/20/85 }
{ }
{ These two types should be declared (via this include file) }
{ anywhere you will be making either software interrupt calls }
{ or DOS calls. Using a free union variant record construct, }
{ a register may be accessed as either a complete 16-bit }
{ register (Word) or two 8-bit register halves (HiByte and }
{ LoByte.) Assume a variable Registers of type Regpack. To }
{ access an entire register, do this: }
{ }
{ Registers.AX.Word := $4406; (Loads the whole AX register) }
{ }
{ To access one half of a register, do this: }
{ }
{ Registers.AX.HiByte := $10; (Loads AH only!) }
{ }
{ And don't forget...you CAN'T include this file inside }
{ another include file! }
{--------------------------------------------------------------}
TYPE
Reg = RECORD
CASE Boolean OF
False : (Word : Integer);
True : (LoByte,HiByte : Byte)
END;
Regpack = RECORD
AX,BX,CX,DX,BP,SI,DI,DS,ES,Flags : Reg
END;