Difference between revisions of "TA11 Magnetic Tape Cassette controller"
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| − | The '''TA11 Magnetic Tape Cassette controller''' is the [[UNIBUS]] [[device controller]] | + | The '''TA11 Magnetic Tape Cassette controller''' is the [[UNIBUS]] [[device controller]] of the '''TA11 Magnetic Tape Cassette System''', which includes a controller and a [[TU60 DECasetteTape Transport]], which uses Phillips-type tape cassettes holding a specially formulated tape. |
The TA11 itself is a [[DEC card form factor|quad]] board, the M7892, which plugs into an [[Small Peripheral Controller|SPC]] slot; a pair of [[BC08-S]] [[flat cable]]s connect the board and drive. All data transfer is via [[programmed I/O]], one byte at a time. | The TA11 itself is a [[DEC card form factor|quad]] board, the M7892, which plugs into an [[Small Peripheral Controller|SPC]] slot; a pair of [[BC08-S]] [[flat cable]]s connect the board and drive. All data transfer is via [[programmed I/O]], one byte at a time. | ||
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* [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-HTACA-A-D%20TA11%20Cassette%20System%20Maintenance%20Manual.pdf TA11 cassette system maintenance manual] | * [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-HTACA-A-D%20TA11%20Cassette%20System%20Maintenance%20Manual.pdf TA11 cassette system maintenance manual] | ||
| + | * [http://www.bitsavers.org/pdf/dec/unibus/TA11EngDwgs.pdf TA11 engineering drawings] | ||
[[Category: UNIBUS Storage Controllers]] | [[Category: UNIBUS Storage Controllers]] | ||
Latest revision as of 00:55, 1 February 2023
The TA11 Magnetic Tape Cassette controller is the UNIBUS device controller of the TA11 Magnetic Tape Cassette System, which includes a controller and a TU60 DECasetteTape Transport, which uses Phillips-type tape cassettes holding a specially formulated tape.
The TA11 itself is a quad board, the M7892, which plugs into an SPC slot; a pair of BC08-S flat cables connect the board and drive. All data transfer is via programmed I/O, one byte at a time.
Contents
Device registers
The TA11 has but two registers, a 'Control and Status' register and a 'Data Buffer' register.
| Register | Abbreviation | Address |
|---|---|---|
| Control and Status Register | TACS | 777500 |
| Data Buffer Register | TADB | 777502 |
777500: Control and Status Register (TACS)
| Error | Block Check | Clear Leader | Write Lock | File Gap | Timing Error | Off Line | Unit Select | Transfer Request | Interrupt Enable | Ready | Last Byte | Function | Go | ||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
The functions are:
| Code | Function | Abbreviation |
|---|---|---|
| 0 | Write File Gap | WFG |
| 1 | Write | WRITE |
| 2 | Read | READ |
| 3 | Space Reverse File | SRF |
| 4 | Space Reverse Block | SRB |
| 5 | Space Forward File | SFF |
| 6 | Space Forward Block | SFB |
| 7 | Rewind | REWIND |
777502: Data Buffer Register (TADB)
| Unused | Data | ||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
