PGM DCB4CH
        REL
        DSEG
* Device control block for the 4 channel board
*       DW 0         link to driver
*       DW 0         LINK TO CODE
*       DW 0
        DW 0         device id
        DW 0         work queue
        DW 0         start routine
        DW 0
        DW 0         stop routine
        DW 0
        NOP
        CALLS 0,0    call driver in code segment
        DW 3         interrupt vector number
        DW #B1       control and status address
        DW #B0       i/o address
         DW    0             work q for port 0 read
         DW    0              "   "  "   "   1  "
         DW    0              "   "  "   "   2  "
         DW    0              "   "  "   "   0 write
         DW    0              "   "  "   "   1  "
         DW    0              "   "  "   "   2  "
        END