PGM DKDCB
        REL
        DSEG
*
* DCB for INTEL double density diskette system (drive 0)
*  version for segmented system
*
*       DW 0         link
*       DW 0         link to code = 0
*       DW 0
        DW 0         id
        DW 0         work queue
        DW 0         START
        DW 0
        DW 0         STOP
        DW 0
        NOP
        CALLS 0,0
        DW 1         interrupt number
        DB #18       mask status for errors
* IOPB starts here
        DB 0         channel word, interrupts on, byte operation
        DB 0         diskette instruction
        DB 4         records per 'logical sector' => 256 words
        DB 0         track address
        DB 1         record address
        DW 0         buffer address
* end of IOPB
        DB 0         request flags
*
        END