Difference between revisions of "TU58 DECtape II"
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The '''TU58 DECtape II''' [[magnetic tape drive]] used the [[DECtape-II]] cartridge, which could hold 256KB. A TU58 unit contained one or two drives, but with two, only one could be operated at a time. It was available in both a standalone case (suitable for desktop usage, or mounting in a 19" rack), or as a bare unit (for mounting in some other unit); in either, it required an external source of power (an optional [[power supply]] was available with the standalone case). | The '''TU58 DECtape II''' [[magnetic tape drive]] used the [[DECtape-II]] cartridge, which could hold 256KB. A TU58 unit contained one or two drives, but with two, only one could be operated at a time. It was available in both a standalone case (suitable for desktop usage, or mounting in a 19" rack), or as a bare unit (for mounting in some other unit); in either, it required an external source of power (an optional [[power supply]] was available with the standalone case). | ||
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The unit included control [[electronics]], including a [[microprocessor]] and [[firmware]]; two versions of the control electronics were available. One (the TU58-XB, [[DEC part number]] 54-13489) provided an [[asynchronous serial line]] interface, for connection to the host computer via a standard serial line [[device controller]]; the other (the TU58-XC, part number 54-13491) provided a [[parallel]] interface. The former supported both [[EIA RS-232 serial line interface|RS-232]] and [[EIA RS-422 serial line interface|RS-422]]; the [[baud rate]] could be set from 38.4 Kbaud to 150 baud by configuration [[jumper]]s. | The unit included control [[electronics]], including a [[microprocessor]] and [[firmware]]; two versions of the control electronics were available. One (the TU58-XB, [[DEC part number]] 54-13489) provided an [[asynchronous serial line]] interface, for connection to the host computer via a standard serial line [[device controller]]; the other (the TU58-XC, part number 54-13491) provided a [[parallel]] interface. The former supported both [[EIA RS-232 serial line interface|RS-232]] and [[EIA RS-422 serial line interface|RS-422]]; the [[baud rate]] could be set from 38.4 Kbaud to 150 baud by configuration [[jumper]]s. | ||
| − | + | Communication with the TU58 used the [[Radial Serial Protocol]] (RSP) or the enhanced [[Modified Radial Serial Protocol]] (MRSP). | |
Average access time using [[random access]] was 9.3 seconds; maximum was 28. Data was verified by a [[checksum]] on each record. | Average access time using [[random access]] was 9.3 seconds; maximum was 28. Data was verified by a [[checksum]] on each record. | ||
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| + | ==Uses== | ||
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| + | The TU58 was used in the following computers: | ||
| + | |||
| + | * [[PDP-11/44]] (as [[mass storage]] device for console subsystem) | ||
| + | * [[VT103]] (as system & data device) | ||
| + | * [[PDP-11/03]] (as system & data device) | ||
| + | * [[VAX-11/750]] (as device for console) | ||
| + | * [[VAX-11/730]] (as device for console) | ||
| + | * [[VAX-11/725]] (as device for console) | ||
| + | * [[HSC50 Mass-Storage Controller|HSC50]] (as load device) | ||
| + | |||
| + | ==Further reading== | ||
| + | |||
| + | * ''TU58 Tape Format and Addressing Modes'', [[MicroNote]] #097 | ||
| + | * ''TU58 Cabling'', MicroNote #073 | ||
| + | * ''Interfacing to the TU58 w/o Break'', MicroNote #086 | ||
| + | * ''TU58 Tips'', MicroNote #096 | ||
| + | * ''TU58 System Power Problem'', MicroNote #101 | ||
| + | * ''Type-in Bootstrap for TU58'', MicroNote #087 | ||
==External links== | ==External links== | ||
Latest revision as of 23:40, 31 July 2024
| TU58 | |
 TU58 drive (in standalone case) | |
| Manufacturer: | DEC |
|---|---|
| Drive Controller(s): | built in |
| Interface Type: | asynchronous serial line or parallel |
| Media: | DECtape II |
| Tape density: | 800 bpi |
| Tape speed: | 30 ips (read/write) 60 ips (search) |
| Size: | 5.2"H x 13.6"D x 19"W |
| Weight: | 20 lbs |
The TU58 DECtape II magnetic tape drive used the DECtape-II cartridge, which could hold 256KB. A TU58 unit contained one or two drives, but with two, only one could be operated at a time. It was available in both a standalone case (suitable for desktop usage, or mounting in a 19" rack), or as a bare unit (for mounting in some other unit); in either, it required an external source of power (an optional power supply was available with the standalone case).
The unit included control electronics, including a microprocessor and firmware; two versions of the control electronics were available. One (the TU58-XB, DEC part number 54-13489) provided an asynchronous serial line interface, for connection to the host computer via a standard serial line device controller; the other (the TU58-XC, part number 54-13491) provided a parallel interface. The former supported both RS-232 and RS-422; the baud rate could be set from 38.4 Kbaud to 150 baud by configuration jumpers.
Communication with the TU58 used the Radial Serial Protocol (RSP) or the enhanced Modified Radial Serial Protocol (MRSP).
Average access time using random access was 9.3 seconds; maximum was 28. Data was verified by a checksum on each record.
Uses
The TU58 was used in the following computers:
- PDP-11/44 (as mass storage device for console subsystem)
- VT103 (as system & data device)
- PDP-11/03 (as system & data device)
- VAX-11/750 (as device for console)
- VAX-11/730 (as device for console)
- VAX-11/725 (as device for console)
- HSC50 (as load device)
Further reading
- TU58 Tape Format and Addressing Modes, MicroNote #097
- TU58 Cabling, MicroNote #073
- Interfacing to the TU58 w/o Break, MicroNote #086
- TU58 Tips, MicroNote #096
- TU58 System Power Problem, MicroNote #101
- Type-in Bootstrap for TU58, MicroNote #087
