KU-14194HB-RevB-KiCad

The rare KU14194HB C64 Motherboard schematics and layout. Retraced in and imported from SprintLayout.

Disclaimer: Artwork not verified. Use at own risk.

Change log

• 2019-11-12: V1.3 Fixes: Mostly missing values.
  • C88: "1000uF 25V" -> "470uF 50uF". Commodore said 1000 but used 470.
  • R31: "180" -> "1K". A mistake in the commodore schematics.
  • R52: "?" -> "330"
  • R53: "?" -> "100"
  • C86: "?" -> "82pF",
  • C36: "0.1" -> "20pF",
  • R22: missing trace. R22 = 0 Ohm. Parallel to C87 (NC). R22 doesn't matter.
  • C101: is a Y5U. VIC2's decoupling cap. Has a higher dielectric rating. Doesn't matter.
  • C70: 15pF 5%. This is a PAL only board. In later revisions, 16pF is used for NTSC.
• 2019-11-10 V1.2 Added missing C14 10uF 25V electrolytic capacitor
• 2019-10-15 V1.1 Layout: Fixed missing keying-slot in user port.
• 2010-10-05 V1.0 First release, not prototyped