Return to dr11c.h CVS log

Up to [Research Unix] / researchv8dc / sys / chaos

Annotation of researchv8dc/sys/chaos/dr11c.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Definitions for DR11-C interface used as Chaosnet link.
                      3:  */
                      4: 
                      5: /*
                      6:  * Structure needed for each transmitter. (member of xminfo union).
                      7:  */
                      8: struct dr11cinfo       {
                      9:        struct dr11c    *dr_addr;       /* Actual UNIBUS address */
                     10:        short           *dr_tptr;       /* Next short in trans pkt */
                     11:        short           *dr_rptr;       /* Next short in rcv pkt */
                     12:        short           dr_tcnt;        /* # of shorts to send in pkt */
                     13:        short           dr_rcnt;        /* # of shorts to rcve in pkt */
                     14:        short           dr_tcheck;      /* Transmit block check word */
                     15:        short           dr_rcheck;      /* Receive block check word */
                     16:        char            dr_tstate;      /* Framing state of transmitter */
                     17:        char            dr_rstate;      /* Framing state of receiver */
                     18:        char            dr_intrup;      /* True during interrupt, used by
                     19:                                           clock level to suppress checking
                     20:                                           for hung interface if clock
                     21:                                           interrupted a dr11c interrupt */
                     22: };
                     23: 
                     24: #ifdef vax
                     25: #define DR11CBASE      (0176770 + UBA0_DEV)    /* base UNIBUS address for first dr11-c */
                     26: #else
                     27: #define DR11CBASE      0167770 /* base UNIBUS address for first dr11-c */
                     28: #endif
                     29: #define DR11CINC       -010    /* increment for next dr11-c */
                     30: /*
                     31:  * Arrangement of dr11 registers
                     32:  */
                     33: struct dr11c   {
                     34:        short   dr_csr;
                     35:        short   dr_obuf;
                     36:        short   dr_ibuf;
                     37: };
                     38: /*
                     39:  * dr_csr bit definitions
                     40:  */
                     41: #define DROUT  02      /* I have sent output - set by xmitter (sets DRIRDY) */
                     42: #define DRORDY 0200    /* He has read output - interrupts (from DRIN) */
                     43: #define DROE   0100    /* Interrupt enable (allow DRORDY to interrupt me) */
                     44: 
                     45: #define DRIN   01      /* I have read input - set by receiver (sets DRORDY)*/
                     46: #define DRIRDY 0100000 /* He has sent input - interrupts (from DROUT) */
                     47: #define DRIE   040     /* Interrupt enable (allow DRIRDY to interrupt me) */
                     48: 
                     49: /*
                     50:  * Definitions of framing characters and CRC constants.
                     51:  */
                     52: #define DR11CHUNG      (HZ*2)
                     53: #define DRSYNC (short)0137773
                     54: #define DRESC  (short)0167776
                     55: /*
                     56:  * Framing states
                     57:  */
                     58: #define DRIDLE 0       /* Idle, between packets */
                     59: #define DRSYN1 1       /* After one DRSYNC sent/received */
                     60: #define DRSYN2 2       /* After two DRSYNC's sent/received */
                     61: #define DRCNT1 3       /* After count sent/received */
                     62: #define DRDATA 4       /* In the middle of data */
                     63: #define DRESC1 5       /* After DRESC escape sent/received */
                     64: #define DRCHECK        6       /* After last data word sent/received */
                     65: #define DRTDONE        7       /* After check is transmitted (transmitter only) */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.