+
+/* if_acpreg.h V1.3 05/30/86 */
+
+/*************************************************************************/
+/* */
+/* */
+/* ________________________________________________________ */
+/* / \ */
+/* | AAA CCCCCCCCCCCCCC CCCCCCCCCCCCCC | */
+/* | AAAAA CCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCC | */
+/* | AAAAAAA CCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCC | */
+/* | AAAA AAAA CCCC CCCC | */
+/* | AAAA AAAA CCCC CCCC | */
+/* | AAAA AAAA CCCC CCCC | */
+/* | AAAA AAAA CCCC CCCC | */
+/* | AAAA AAAAAAAAAAA CCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCC | */
+/* | AAAA AAAAAAAAAAA CCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCC | */
+/* | AAAA AAAAAAAAA CCCCCCCCCCCCCC CCCCCCCCCCCCCC | */
+/* \________________________________________________________/ */
+/* */
+/* Copyright (c) 1986 by Advanced Computer Communications */
+/* 720 Santa Barbara Street, Santa Barbara, California 93101 */
+/* (805) 963-9431 */
+/* */
+/* */
+/* File: if_acpreg.h */
+/* */
+/* Author: Arthur Berggreen */
+/* */
+/* Project: ACP6100 (UPB with HDLC firmware) */
+/* ACP5100 (QPB with HDLC firmware) */
+/* */
+/* Revision History: */
+/* */
+/* 21-NOV-1985 Clare Russ: add fileheader and comments */
+/* Add definitions for implementatin of new Command Interface */
+/* (CIF) and Access Path Allocation Protocol (APAP). */
+/* */
+/*************************************************************************/
+\f
+
+/* device registers */
+struct acpregs {
+ u_short csr; /* control and status register */
+ /* I/O request mailbox */
+ u_short req_chan; /* FDX channel number */
+ u_char req_adx; /* address bits 17-16 */
+ u_char req_flags; /* mailbox flags */
+ u_short req_addr; /* address bits 15-00 */
+ u_short req_cnt; /* byte count */
+ u_char req_fcn; /* I/O function */
+ u_char req_sbf; /* I/O subfunction */
+ /* I/O completion mailbox */
+ u_short cmp_chan; /* FDX channel number */
+ u_char cmp_unused; /* address bits 17-16 */
+ u_char cmp_flags; /* mailbox flags */
+ u_short cmp_cnt; /* byte count */
+ u_char cmp_stat; /* I/O status */
+ u_char cmp_sbst; /* I/O substatus */
+ /* Transfer request mailbox */
+ u_short xfr_chan; /* FDX channel number */
+ u_char xfr_adx; /* address bits 17-16 */
+ u_char xfr_flags; /* mailbox flags */
+ u_short xfr_addr; /* address bits 15-00 */
+ u_short xfr_cnt; /* byte count */
+ /* System status mailbox */
+ u_char sys_vers; /* system version number */
+ u_char sys_id; /* system identification */
+ u_char sys_vect; /* interrupt vector base */
+ u_char sys_stat; /* system status */
+};
+
+
+/* defines for CSR */
+
+#define CSR_BIT15 0x8000
+#define CSR_BIT14 0x4000
+#define CSR_MAINT 0x2000
+#define CSR_HALT 0x1000
+#define CSR_IBPEND 0x0800
+#define CSR_IAPEND 0x0400
+#define CSR_IBREQ 0x0200
+#define CSR_IAREQ 0x0100
+#define CSR_BIT7 0x0080
+#define CSR_BIT6 0x0040
+#define CSR_INTRB 0x0020 /* ACP CPU Interrupt A Request */
+#define CSR_INTRA 0x0010 /* ACP CPU Interrupt B Request */
+#define CSR_IENB 0x0008 /* enable UNIBUS interrupt b */
+#define CSR_IENA 0x0004 /* enable UNIBUS interrupt a */
+#define CSR_DMAEN 0x0002
+#define CSR_RESET 0x0001
+
+/* mailbox handshake flags */
+
+#define FLAGS_RDY 0x80
+#define FLAGS_DON 0x40
+#define FLAGS_DIR 0x20
+
+/* I/O request function code definitions */
+
+#define ACPRED 0x01 /* read from ACP */
+#define ACPWRT 0x02 /* write to ACP */
+#define ACPSTR 0x10 /* stream flag */
+#define ACPEOS (0x20|ACPSTR) /* end of stream flag */
+#define ACPABT 0x04 /* abort flag */
+#define ACPXFR 0x40 /* tranfer req/grant flag */
+
+#define FCN_MASK 0x07
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