Int 2F/AX=121Dh

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DOS 3.0+ internal - SUM MEMORY

AX = 121Dh
DS:SI -> memory to add up
CX = 0000h
DX = limit

Return:
AL = byte which exceeded limit CX = number of bytes before limit exceeded DX = remainder after adding first CX bytes DS:SI -> byte beyond the one which exceeded the limit

Notes: Used by DOS to determine year or month given day count since 1980/1/1. Supported by DR DOS 5.0+

See Also: AX=121Ch

Category: DOS Kernel - Int 2Fh - D

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