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boards:ecb:scg:changes [2019/05/14 09:29]
b1ackmai1er created
boards:ecb:scg:changes [2019/05/14 09:39] (current)
b1ackmai1er
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 ====== Changes & Errata ====== ====== Changes & Errata ======
 +
 +===== Kontron Reset modification =====
 +
 +The current SCG design has the reset circuit hardwired for Legacy/​N8VEM mode. To convert to Kontron mode apply the following changes:
 +
 +  * Disconnect pin 8 of U12 from C31 of the ECB connector.
 +  * Connect pin 8 of U12 to C26 of the ECB connector.
 +  * The easiest way to do this is the cut the C31 wire on the ECB connector and then link C31 pad to C26 pad.
 +
 +===== Version 003 changes =====
  
 On version SCG-002 and prior, John Coffman identified that the I/O select circuit is qualified only by IORQ# (low). It should be further qualified by M1# (high). The board will erroneously select on an Interrupt Acknowledge (IORQ# low, M1# low). This has been correct in SCG-003. On version SCG-002 and prior, John Coffman identified that the I/O select circuit is qualified only by IORQ# (low). It should be further qualified by M1# (high). The board will erroneously select on an Interrupt Acknowledge (IORQ# low, M1# low). This has been correct in SCG-003.
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   * Link pin A20 on ECB connector to pin 13 on IC U10.   * Link pin A20 on ECB connector to pin 13 on IC U10.
   * If socket on IC U10 prevents cutting the track then lift pin 13 and link the pin to A20.   * If socket on IC U10 prevents cutting the track then lift pin 13 and link the pin to A20.
 +
 +===== Version 002 information =====
  
 {{:​boards:​ecb:​scg:​scg-002_board.pdf|Board:​ scg-002_board.pdf}} {{:​boards:​ecb:​scg:​scg-002_board.pdf|Board:​ scg-002_board.pdf}}
boards/ecb/scg/changes.txt · Last modified: 2019/05/14 09:39 by b1ackmai1er
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