X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 15 - os hook

Click above to get retro games delivered to your door ever month! X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 15 - os hook - device busy loop (at,xt2,xt286,conv,ps)

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INT 15 - OS HOOK - DEVICE BUSY LOOP (AT,XT2,XT286,CONV,PS)
        AH = 90h
        AL = type code
            00h disk
            01h diskette
            02h keyboard
            03h PS/2 pointing device
            80h network
            FCh disk reset
            FDh diskette motor start
            FEh printer
        ES:BX -> request block for type codes 80h through BFh
Return: CF set if wait time satisfied
        CF clear if driver must perform wait
Note:   type codes are allocated as follows:
          00-7F non-reentrant devices; OS must arbitrate access
          80-BF reentrant devices; ES:BX points to a unique control block
          C0-FF wait-only calls, no complementary INT 15/AH=91h call
SeeAlso: AH=91h

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