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boards:sbc:6x0x-atx-6u:start [2015/10/30 23:30]
admin ↷ Links adapted because of a move operation
boards:sbc:6x0x-atx-6u:start [2016/06/17 03:45] (current)
tor WDC is Western Design Center, not Western Digital. WD never made 65C02.
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 ===== Pictures ===== ===== Pictures =====
  
-==== Completed Production Board (6502 / DOS/65 Configuration) ====+==== Completed Production Board (6502/​DOS/​65 Configuration) ====
  
 {{boards:​sbc:​6x0x-atx-6u:​6502dos65-jumpers.jpg?​640}} {{boards:​sbc:​6x0x-atx-6u:​6502dos65-jumpers.jpg?​640}}
  
-==== Completed Production Board (6809 / Flex9 Configuration) ====+==== Completed Production Board (6809/Flex9 Configuration) ====
  
 {{boards:​sbc:​6x0x-atx-6u:​6809flex9-jumpers.jpg?​640}} {{boards:​sbc:​6x0x-atx-6u:​6809flex9-jumpers.jpg?​640}}
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 ===== IC Selection Notes ===== ===== IC Selection Notes =====
  
-Rockwell/​CMD and Western ​Digital ​6502 CPUs have slight differences in pinout. The board was designed for Rockwell/​CMD 6502 in order to make it compatible with 6802 processors. To use a Western ​Digital ​W65C02S6TPG-14 simply obtain an extra 40 pin DIP machine pin socket, snip off pin 36, and solder a jumper from pin 35 to pin 36. Insert the WDC 6502 into the modified socket and insert the stack into the board. Details are available in the google group in a post on 2014-07-31 by AG5AT. The post by Ian May on 2014-08-01 details several other differences between Rockwell and WDC chips.+Rockwell/​CMD and Western ​Design Center ​6502 CPUs have slight differences in pinout. The board was designed for Rockwell/​CMD 6502 in order to make it compatible with 6802 processors. To use a Western ​Design Center ​W65C02S6TPG-14 simply obtain an extra 40 pin DIP machine pin socket, snip off pin 36, and solder a jumper from pin 35 to pin 36. Insert the WDC 6502 into the modified socket and insert the stack into the board. Details are available in the google group in a post on 2014-07-31 by AG5AT. The post by Ian May on 2014-08-01 details several other differences between Rockwell and WDC chips.
  
 As designed the board uses MAX232 level shifters which require 1 uF charge pump capacitors. MAX232A can operate with 0.1 uF charge pump capacitors. If you want to install 0.1 uF caps instead of 1.0 uF caps, the ten caps to change are C44 C45 C46 C47 and C48 for the propeller serial port, and C90 C91 C94 C95 C96 for the ACIA serial port. As designed the board uses MAX232 level shifters which require 1 uF charge pump capacitors. MAX232A can operate with 0.1 uF charge pump capacitors. If you want to install 0.1 uF caps instead of 1.0 uF caps, the ten caps to change are C44 C45 C46 C47 and C48 for the propeller serial port, and C90 C91 C94 C95 C96 for the ACIA serial port.
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 ====== File Listing ====== ====== File Listing ======
  
-{{filelist>:​boards:​sbc:​6x0x-atx-6u:​*.pdf&​style=table&​tableheader=1&​tableshowdate=1&​tableshowsize=1}}+{{filelist>:​boards:​sbc:​6x0x-atx-6u:​*.*&​style=table&​tableheader=1&​tableshowdate=1&​tableshowsize=1}}
  
  
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boards/sbc/6x0x-atx-6u/start.1446262232.txt.gz · Last modified: 2015/10/30 23:30 by admin
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