Difference between revisions of "CXY08 8-Line Asynchronous Multiplexer"

From Computer History Wiki
Jump to: navigation, search
(Turn into real article)
m (External links: +IN, FMPS)
 
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
[[Image:M3119-YA.jpg|30px|right|thumb|M3119-YA Multiplexer Card]]
+
[[Image:M3119-YA.jpg|300px|right|thumb|M3119-YA Multiplexer Card]]
  
 
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]].
 
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]].
Line 7: Line 7:
 
==Implementation==
 
==Implementation==
  
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).
+
Physically, the CXY08 consisted of a single [[DEC card form factor|quad]] 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).
  
 
==Device registers==
 
==Device registers==
Line 15: Line 15:
 
==Further reading==
 
==Further reading==
  
* EK-CXY08-UG, CXY08 User's Guide
+
* ''CXY08 User's Guide'' (EK-CXY08-UG) - not available online
* EK-CXY08-TM, CXY08 Technical Manual
+
* ''CXY08 Technical Manual'' (EK-CXY08-TM) - not available online
  
[[Category: QBUS Serial Interfaces]]
+
==External links==
 +
 
 +
* [http://vaxhaven.com/images/f/fe/EK-CXY08-IN-001.pdf CXY08-AF 8-Line Asynchronous Multiplexer Option Installation Guide] (EK-CXY08-IN-001)
 +
* [http://bitsavers.org/pdf/dec/qbus/MP02382_CXY08_sch_Mar87.pdf CXY08 Field Maintenance Print Set] (MP-02382)
 +
 
 +
[[Category: QBUS Asynchronous Serial Interfaces]]

Latest revision as of 12:05, 17 February 2023

M3119-YA Multiplexer Card

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 quad 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

  • CXY08 User's Guide (EK-CXY08-UG) - not available online
  • CXY08 Technical Manual (EK-CXY08-TM) - not available online

External links