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80 Characters Video Port

Employed in: C128

The C128's 80 character video port is handled by the VDC. You attach a digital monitor here, i.e. with TTL inputs. N

ote that you cannot display VIC-IIe output (40 char screen) via this port.

Connection scheme

 -----------------------
 \  5   4   3   2   1  /
  \                   /
   \  9   8   7   6  /
    \_______________/

Signal Description

Control Port 1

  Pin | Signal      | Note
  ----+-------------+------
   1  | GND         |
   2  | GND         |
   3  | Red         | TTL
   4  | Green       | TTL
   5  | Blue        | TTL
   6  | Intensity   | TTL
   7  | Monochrome  | 1 Vpp, 15625 Hz line frequency
   8  | Hsync       | TTL, Horizontal synchronization
   9  | Vsync       | TTL, Vertical synchronization, 50 Hz, TTL

Note: All pictures show the plug side.

[1] Commodore 128 Bedienungshandbuch, Belegung der 80-Zeichen-Videobuchse, p.L-2 (German).

Updated: January 15th, 1998
Created: January 15th, 1998
Status : NOT VERIFIED!
Site copyright © 1997 by Marc-Jano Knopp
This document is part of MJK's Commodore 64 & LCD Page
Brought back to life by Peter Schepers, Dec 10, 2005 because I really liked this site!