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# Definitions for the Model 75 UNIX/IIS device driver.
define IIS_READ 1 # read function code
define IIS_WRITE 0 # write function code
define IIS_INACTIVE 2 # no i/o in progress
# Function control block structure containing only our own internal variables.
define LEN_FCB 20
define FCB_CHAN Memi[($1)] # os channel
define FCB_STATUS Mems[P2S(($1)+1)] # channel status (r, w, err)
define FCB_NBYTES Mems[P2S(($1)+2)] # nbytes last transfer
define FCB_STATE Mems[P2S(($1)+3)] # instruction processing state
define FCB_IISHDR Mems[P2S(($1)+4)] # m70 header of current instr.
# (extra space)
# Instruction processing states
define READY 0 # ready for new instruction
define DATA_READ 1 # read data to complete instruction
define DATA_WRITE 2 # write data to complete instruction
# IIS device status words.
define IIS_FILSIZE (512 * 512 * SZB_CHAR)
define IIS_BLKSIZE 1024
define IIS_OPTBUFSIZE (512 * SZB_CHAR)
define IIS_MAXBUFSIZE 16384
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