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Table 1554

Format of ASPITAPE.SYS mtop parameter block:
Offset	Size	Description	)
 00h	WORD	operation code
		00h "MTWEOF" - write an end-of-file record
		01h "MTFSF" - forward space file
		02h "MTBSF" - backward space file
		03h "MTFSR" - forward space record
		04h "MTBSR" - backward space record
		05h "MTREW" - rewind
		06h "MTOFFL" - rewind and unload
		07h "MTNOP" - perform TEST UNIT READY
 02h	DWORD	repetition count

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