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TRegisters (type) (WinDos unit)
The Intr and MsDos procedures use variables of type TRegisters to specify the input register contents and examine the output register contents of a software interrupt.
type
TRegisters = record
case Integer of
0: (AX, BX, CX, DX, BP, SI, DI, DS, ES, Flags: Word);
1: (AL, AH, BL, BH, CL, CH, DL, DH: Byte);
end;
Notice the use of a variant record to map the 8-bit registers on top of their 16-bit equivalents.