Difference between revisions of "CXY08 8-Line Asynchronous Multiplexer"
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| + | The '''CXY08 8-Line Asynchronous Multiplexer''' is a later [[QBUS]] equivalent to the [[UNIBUS]] [[DH11 asynchronous serial line interface|DH11]] (it is a replacement for the [[DHQ11 asynchronous serial line interface|DHQ11]]). It provided 8 [[EIA RS-232 serial line interface|RS-232]] [[asynchronous serial line]]s. Output used [[Direct Memory Access|DMA]] (with each line having its own [[buffer]] [[pointer]] and count); input used a 256-character [[First-In First-Out buffer|FIFO buffer]]. | ||
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| + | Like the DHQ11, it can be set (via a switch) to exactly emulate either a [[DHV11 asynchronous serial line interface|DHV11]] or [[DHU11 asynchronous serial line interface|DHU11]]. It has full [[modem]] control. | ||
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| + | ==Implementation== | ||
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| + | Physically, the CXY08 consisted of a single [[DEC card form factor|dual]] card, the M3119-YA. It connected to a pair of BC19N-12 distribution cable assemblies (4 lines each); each BC19N ends in four male [[EIA RS-232 serial line interface#Connectors|DB-25 connectors]] (DB-25P). | ||
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| + | ==Device registers== | ||
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| + | The [[register]]s will depend on whether it is emulating a DHV11 or DHU11. | ||
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| + | ==Further reading== | ||
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| + | * EK-CXY08-UG, CXY08 User's Guide | ||
| + | * EK-CXY08-TM, CXY08 Technical Manual | ||
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| + | [[Category: QBUS Serial Interfaces]] | ||
Revision as of 17:06, 26 August 2021
The CXY08 8-Line Asynchronous Multiplexer is a later QBUS equivalent to the UNIBUS DH11 (it is a replacement for the DHQ11). It provided 8 RS-232 asynchronous serial lines. Output used DMA (with each line having its own buffer pointer and count); input used a 256-character FIFO buffer.
Like the DHQ11, it can be set (via a switch) to exactly emulate either a DHV11 or DHU11. It has full modem control.
Implementation
Physically, the CXY08 consisted of a single dual card, the M3119-YA. It connected to a pair of BC19N-12 distribution cable assemblies (4 lines each); each BC19N ends in four male DB-25 connectors (DB-25P).
Device registers
The registers will depend on whether it is emulating a DHV11 or DHU11.
Further reading
- EK-CXY08-UG, CXY08 User's Guide
- EK-CXY08-TM, CXY08 Technical Manual
