Circuit Diagrams: Difference between revisions

Revision as of 13:53, 25 August 2023

The KS1 and KS2 schematics can be downloaded here.

The three tail matrix keyboard schematic can be downloaded here.

Notes:

In VGA mode (scandoubler enabled), H-SYNC and V-SYNC are carried separately on their respective pins.
In RGB mode (scandoubler disabled), H-SYNC carries composite sync, and V-SYNC carries 1.
Pin 14 carries 3V3, which can be connected to SCART pin 16 to indicate RGB to the display.
There is no convenient source of voltages between 9.5-12V to indicate 4:3 aspect ratio to the display on SCART pin 8, so this is usually left unconnected.

@@ Line 1: / Line 1: @@
-== Schematic ==
+== Schematics ==
-The Issue 2B (rev 1) schematic can be downloaded [https://gitlab.com/thesmog358/tbblue/-/raw/master/docs/schematics/specnext-schematics.pdf?inline=false here].
+The KS1 and KS2 schematics can be downloaded [https://gitlab.com/thesmog358/tbblue/-/tree/master/docs/schematics?inline=false here].
-The thee tail matrix keyboard schematic can be downloaded [https://github.com/Threetwosevensixseven/NXtel/wiki/images/NS58A-5-01-04.pdf here].
+The three tail matrix keyboard schematic can be downloaded [https://github.com/Threetwosevensixseven/NXtel/wiki/images/NS58A-5-01-04.pdf here].
 == J13 - Daughter board connector ==