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boards:ecb:vdu:start [2019/01/13 18:44]
b1ackmai1er [Connectors]
boards:ecb:vdu:start [2019/01/14 02:18] (current)
b1ackmai1er [Parts]
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 {{:​boards:​ecb:​vdu:​vdu-parts.txt|:​boards:​ecb:​vdu:​vdu-parts.txt}} {{:​boards:​ecb:​vdu:​vdu-parts.txt|:​boards:​ecb:​vdu:​vdu-parts.txt}}
  
-\\+==== Parts substitution:​ ==== 
 + 
 +__SY6545A__ 
 The ECB-VDU incorporates a 6545 CRT controller (CRTC). The 6545 was a popular design and a range of derivatives and enhanced versions of this design were offered by different manufacturers under the 6545 and 6845 designation. For compatibility with this board the CRTC chip must support '​transparent'​ mode and 2Mhz operation. The ECB-VDU incorporates a 6545 CRT controller (CRTC). The 6545 was a popular design and a range of derivatives and enhanced versions of this design were offered by different manufacturers under the 6545 and 6845 designation. For compatibility with this board the CRTC chip must support '​transparent'​ mode and 2Mhz operation.
  
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 A range of data sheets are available {{:​boards:​ecb:​vdu:​datasheets-6545-6845.zip|here}} ​ for reference. A range of data sheets are available {{:​boards:​ecb:​vdu:​datasheets-6545-6845.zip|here}} ​ for reference.
 +
 +__Resistor network arrays:__
 +
 +The 1K5 resistor networks are specified as 10 pin units. These are difficult to obtain and 9 pin units can be substituted as the the last resistor is not used. Additionally the value for these pull up resistors ​ are not critical and anything in the range 1K5 to 4K7 should work.
 +
 +__Other:__
 +
 +__Capacitor__
 +
 +__Transistor __
  
  
boards/ecb/vdu/start.txt · Last modified: 2019/01/14 02:18 by b1ackmai1er
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