Changes & Errata

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.

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.

To update version 002 board:

• Cut track between pin 13 and pin 14 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.

Board: scg-002_board.pdf

Schematic: scg-002_schematic.pdf

Manufacturing Files: :boards:ecb:scg:sgc-002_gerbers.zip

KiCAD Files: ecb_scg-002.zip

For information on prior board versions, see the Legacy Wiki SCG Folder.