User`s guide

BDOS FUNCTION 31: GET ADDR(DPB PARMS)

Entry Parameters:

Returned Value:

Function 31 returns in register pair HL the address of the BIOS-resident Disk

Parameter Block, DPB, for the currently selected drive. (Refer to the CP/M Plus

(CP/M Version 3) Operating System System Guide for the format of the DPB). The

calling program can use this address to extract the disk parameter values.

If a physical error is encountered when the BDOS error mode is one of the return

modes (see Function 45), Function 31 returns the value OFFFFH in the register pair

HL.

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BDOS Function Calls CP/M 3 Programmers Guide