Parallel Port Modules
This page discusses the LSI-11 parallel port modules, which vary from general purpose I/O to special purpose modules. It is somewhat of a catch-all page.
The table below contains a comparison of different parallel modules available.
| Module Number | M7941 | M7950 | M8049 | M7651 | M7193 | M7949 | M8027 | M7954 | M8634 |
|---|---|---|---|---|---|---|---|---|---|
| Model Number | DRV11 | DRV11-B | DRV11-J | DRV11-WA | DRQ11-CA | LAV11 | LPV11 | IBV11-A | IEQ11-A |
| Introduced | 1976 | 1976 | 1979 | 1985 | 1980 | 1979 | 1981 | 1984 | |
| Discontinued | 1985 | 1980 | |||||||
| Board Size | Dual | Quad | Dual | Dual | Dual | Dual | Dual | Dual | Quad |
| Q-bus Address Size | 16-bits | 16-bits | 16-bits | 22-bits | 22-bits | 16-bits | 16-bits | 16-bits | 22-bits |
| Parallel Ports | 1 | 1 | 4 | 1 | 1 | 1 | 1 | 1 | 2 |
| Port Width (Each) | 16-bits | 16-bits | 16-bits | 16-bits | 16-bits | 8-bits | 8-bits | 8-bits | 8-bits |
| DMA Capable | no | yes | no | yes | yes | no | no | no | yes |
| Bidirectional | yes | yes | yes | yes | yes | no | no | yes | yes |
| Maximum Transfer Rate | 40,0000 wps | 250,000 wps1 | 250,000 wps2 | ||||||
| AC Bus Load | 2.8 | 3.3 | 2 | 1 | 1.8 | 1.4 | 1.4 | 1.77 | 2 |
| DC Bus Load | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| +5V Load | 0.9 A | 1.9 A | 1.8 A | 1.8 A | 1.4 A | 0.8 A | 0.8 A | 1.5 A | 3.5 A |
| +12V Load |
1
500,000 words per second in burst mode.
2
400,000 words per second in burst mode.
Summary
The DRV11 models are all bidirectional, 16-bit wide general purpose interfaces. These are for connecting to instrumentation and other computers. The LAV11 & LPV11 are a dedicated printer interfaces. The IBV11 and IEQ11 are GPIB (IEEE-488) instrumentation interfaces.
References
- Digital Memories and Peripherals Handbook, 1978
- LSI-11 Systems Service Manual, 5th Edition, January 1985 (EK-LSIFS-SV-005)
- DRV11-B General Purpose DMA Interface User's Manual, 1st Edition, August 1976 (EK-DRV1B-OP-001)
- DRV11-J Parallel Line Interface User's Guide, 2nd Edition, November 1980 (EK-DRV1J-UG-002)
- DRV11-WA General Purpose DMA Interface User's Guide, 2nd Edition, April 1986 (EK-DRVWA-UG-002)
- LPV11 Printer System User's Manual, 1st Edition, November 1977 (EK-LPV11-OP-001)
- IBV11-A LSI-11/Instrument Bus Interface User's Manual, 1st Edition, June 1977 (EK-IBV11-UG-001)
Additional Resources
- MicroNote 5 - Q22 Compatible Options
