84bf5f4d14
This change updates the 3B2 README.md file, and fixes all line endings on 3B2 source files.
153 lines
5.7 KiB
C
153 lines
5.7 KiB
C
/* 3b2_ctc.h: CM195H 23MB Cartridge Tape Controller CIO Card
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Copyright (c) 2018-2022, Seth J. Morabito
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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Except as contained in this notice, the name of the author shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from the author.
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*/
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/*
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* CTC is an intelligent feature card for the 3B2 that supports a
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* Cipher "FloppyTape(tm)" 525 drive that can read and write 23MB
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* DC600A cartridges.
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*
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* The CTC card is based on the Common I/O (CIO) platform.
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*
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* Notes:
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* ------
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*
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* The Cipher FloppyTape is an odd beast. Although it's a tape drive,
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* it is controlled by a floppy controller. It is divided into virtual
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* sectors that can be addressed by Cylinder / Track / Sector.
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* Stepping and head select pulses dictate where on the tape to read
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* from or write to. Moreover, System V maps a filesystem onto the
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* tape, and a properly formatted tape drive will have a VTOC on
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* partition 0.
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*
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*/
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#ifndef _3B2_CTC_H_
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#define _3B2_CTC_H_
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#include "3b2_defs.h"
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#define CTC_ID 0x0005
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#define CTC_IPL 12
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#define CTC_VERSION 1
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/* Request Opcodes */
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#define CTC_CONFIG 30
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#define CTC_CLOSE 31
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#define CTC_FORMAT 32
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#define CTC_OPEN 33
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#define CTC_READ 34
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#define CTC_WRITE 35
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#define CTC_VWRITE 36
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/* Completion Opcodes */
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#define CTC_SUCCESS 0
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#define CTC_HWERROR 32
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#define CTC_RDONLY 33
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#define CTC_NOTREADY 36
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#define CTC_RWERROR 37
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#define CTC_NOMEDIA 42
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/* VTOC values */
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#define VTOC_VERSION 1
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#define VTOC_SECSZ 512
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#define VTOC_PART 16 /* Number of "partitions" on tape */
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#define VTOC_VALID 0x600DDEEE /* Magic number for valid VTOC */
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#define CTC_NUM_SD 2
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#define CTC_SD_FT25 4
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#define CTC_SD_FD5 1
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/* Physical Device Info (pdinfo) values */
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#define PD_VALID 0xCA5E600D /* Magic number for valid PDINFO */
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#define PD_DRIVEID 5
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#define PD_VERSION 0
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#define PD_CYLS 6
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#define PD_TRACKS 245
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#define PD_SECTORS 31
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#define PD_BYTES 512
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#define PD_LOGICALST 29
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#define CTC_CAPACITY (PD_CYLS * PD_TRACKS * PD_SECTORS) /* In blocks */
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struct partition {
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uint16 id; /* Partition ID */
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uint16 flag; /* Permission Flags */
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uint32 sstart; /* Starting Sector */
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uint32 ssize; /* Size in Sectors */
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};
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struct vtoc {
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uint32 bootinfo[3]; /* n/a */
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uint32 sanity; /* magic number */
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uint32 version; /* layout version */
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uint8 volume[8]; /* volume name */
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uint16 sectorsz; /* sector size in bytes */
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uint16 nparts; /* number of partitions */
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uint32 reserved[10]; /* free space */
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struct partition part[VTOC_PART]; /* partition headers */
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uint32 timestamp[VTOC_PART]; /* partition timestamp */
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};
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struct pdinfo {
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uint32 driveid; /* identifies the device type */
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uint32 sanity; /* verifies device sanity */
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uint32 version; /* version number */
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uint8 serial[12]; /* serial number of the device */
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uint32 cyls; /* number of cylinders per drive */
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uint32 tracks; /* number tracks per cylinder */
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uint32 sectors; /* number sectors per track */
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uint32 bytes; /* number of bytes per sector */
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uint32 logicalst; /* sector address of logical sector 0 */
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uint32 errlogst; /* sector address of error log area */
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uint32 errlogsz; /* size in bytes of error log area */
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uint32 mfgst; /* sector address of mfg. defect info */
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uint32 mfgsz; /* size in bytes of mfg. defect info */
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uint32 defectst; /* sector address of the defect map */
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uint32 defectsz; /* size in bytes of defect map */
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uint32 relno; /* number of relocation areas */
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uint32 relst; /* sector address of relocation area */
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uint32 relsz; /* size in sectors of relocation area */
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uint32 relnext; /* address of next avail reloc sector */
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};
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typedef struct {
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uint32 time; /* Time used during a tape session (in 25ms chunks) */
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uint32 bytnum; /* Byte number, for streaming mode */
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} CTC_STATE;
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t_stat ctc_reset(DEVICE *dptr);
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t_stat ctc_svc(UNIT *uptr);
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t_stat ctc_attach(UNIT *uptr, CONST char *cptr);
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t_stat ctc_detach(UNIT *uptr);
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void ctc_sysgen(uint8 slot);
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void ctc_express(uint8 slot);
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void ctc_full(uint8 slot);
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#endif /* _3B2_CTC_H_ */
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