1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)if_dmc.h 7.2 (Berkeley) 12/12/87 7 */ 8 9 /* 10 * DMC-11 Interface 11 */ 12 13 struct dmcdevice { 14 char bsel0; 15 char bsel1; 16 char bsel2; 17 char bsel3; 18 short sel4; 19 short sel6; 20 }; 21 22 /* 23 * dmc software packet encapsulation. This allows the dmc 24 * link to be multiplexed among several protocols. 25 * The first eight bytes of the dmc header are garbage, 26 * since on a vax the uba has been known to mung these 27 * bytes. The next two bytes encapsulate packet type. 28 */ 29 struct dmc_header { 30 char dmc_buf[8]; /* space for uba on vax */ 31 short dmc_type; /* encapsulate packet type */ 32 }; 33 34 /* packet types */ 35 #define DMC_IPTYPE 1 36 #define DMC_TRAILER 2 37 #define DMC_NTRAILER 16 38 39 /* 40 * DMCMTU includes space for data (1024) + 41 * protocol header (256) + trailer descriptor (4). 42 * The software link encapsulation header (dmc_header) 43 * is handled separately. 44 #define DMCMTU 1284 45 */ 46 #define DMCMTU 1500 47 48 #define RDYSCAN 16 /* loop delay for RDYI after RQI */ 49 50 /* defines for bsel0 */ 51 #define DMC_BACCI 0 52 #define DMC_CNTLI 1 53 #define DMC_PERR 2 54 #define DMC_BASEI 3 55 #define DMC_WRITE 0 /* transmit block */ 56 #define DMC_READ 4 /* read block */ 57 #define DMC_RQI 0040 /* port request bit */ 58 #define DMC_IEI 0100 /* enable input interrupts */ 59 #define DMC_RDYI 0200 /* port ready */ 60 #define DMC0BITS "\10\8RDI\7IEI\6RQI" 61 62 /* defines for bsel1 */ 63 #define DMC_MCLR 0100 /* DMC11 Master Clear */ 64 #define DMC_RUN 0200 /* clock running */ 65 #define DMC1BITS "\10\8RUN\7MCLR" 66 67 /* defines for bsel2 */ 68 #define DMC_BACCO 0 69 #define DMC_CNTLO 1 70 #define DMC_OUX 0 /* transmit block */ 71 #define DMC_OUR 4 /* read block */ 72 #define DMC_IEO 0100 /* enable output interrupts */ 73 #define DMC_RDYO 0200 /* port available */ 74 #define DMC2BITS "\10\8RDO\7IEO" 75 76 /* defines for CNTLI mode */ 77 #define DMC_HDPLX 02000 /* half duplex DDCMP operation */ 78 #define DMC_SEC 04000 /* half duplex secondary station */ 79 #define DMC_MAINT 00400 /* enter maintenance mode */ 80 81 /* defines for BACCI/O and BASEI mode */ 82 #define DMC_XMEM 0140000 /* xmem bit position */ 83 #define DMC_CCOUNT 0037777 /* character count mask */ 84 #define DMC_RESUME 0002000 /* resume (BASEI only) */ 85 86 /* defines for CNTLO */ 87 #define DMC_CNTMASK 01777 88 89 #define DMC_DATACK 01 90 #define DMC_TIMEOUT 02 91 #define DMC_NOBUFS 04 92 #define DMC_MAINTREC 010 93 #define DMC_LOSTDATA 020 94 #define DMC_DISCONN 0100 95 #define DMC_START 0200 96 #define DMC_NEXMEM 0400 97 #define DMC_ERROR 01000 98 99 #define DMC_FATAL (DMC_ERROR|DMC_NEXMEM|DMC_START|DMC_LOSTDATA|DMC_MAINTREC) 100 #define CNTLO_BITS \ 101 "\10\12ERROR\11NEXMEM\10START\7DISC\5LSTDATA\4MAINT\3NOBUF\2TIMEO\1DATACK" 102