Int 21/AX=2535h

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Phar Lap 386/DOS-Extender v3.0+ - READ/WRITE SYSTEM REGISTERS

AX = 2535h
EBX = direction (00h read registers, 01h write)
DS:EDX -> system register record (see #01375)

Return:
CF clear

Note: This call is only available under MS Windows if PHARLAP.386 VDD is installed

Format of Phar Lap system register record: Offset Size Description (Table 01375) 00h DWORD CR0 04h 4 DWORDs DR0,DR1,DR2,DR3 14h 2 DWORDs reserved 1Ch 2 DWORDs DR6,DR7 24h 3 DWORDs reserved

Category: DOS Extenders - Int 21h - P

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