Differences

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--- boards:ecb:scg:changes [2024/08/08 22:58] – Initial import from Wayback Machine
+++ boards:ecb:scg:changes [2026/06/15 12:50] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+/* Imported from Wayback Machine
+   Original URL : https://retrobrewcomputers.org/doku.php?id=boards:ecb:scg:changes
+   Snapshot date: 2024-08-08
+   Generator    : wayback-archiver
+*/
+====== 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.
+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.
+===== Version 002 information =====
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:ecb:scg:scg-002_board.pdf|Board: scg-002_board.pdf]]
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:ecb:scg:scg-002_schematic.pdf|Schematic: scg-002_schematic.pdf]]
+Manufacturing Files: [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:ecb:scg:sgc-002_gerbers.zip|:boards:ecb:scg:sgc-002_gerbers.zip]]
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:ecb:scg:ecb_scg-002.zip|KiCAD Files: ecb_scg-002.zip]]
+For information on prior board versions, see the [[n8vem-pbwiki-archive:0:35845334:48860720:33053543:index|Legacy Wiki SCG Folder]].