Hi, We have an ancient proprietary workstation that has to remain in
service. The brand X monitor on it has just died. The video cable is an
ordinary 9-core ribbbon with a DB-9 on the monitor end. Does this suggest
any particular video format, and pinout? TIA
It might be an old CGA monitor pinout These had a digital R,G,B
output (high=colour on low=off) and an intensity line that went high
for full brightness and low for half brightness, and 2 syncs (H+V) The
rest of the pins were the usual earth for each signal.
If this is the case, you wont be able to use an LCD monitor, as these
wont go down that far in resolution. You will need a monitor such as
an old arcade type monitor, or a converter unit to make it VGA.
http://www.interfacebus.com/Design_Connector_Monitor_Buses.html
CGA [Color Graphics Adapter]: The CGA standard [1981] supports several
different modes; the highest quality text mode is 80x25 characters in
16 colors. The monitors are digital with a composite signal which is
at TTL logic levels; Hs, Vs, and RGBI all at TTL logic levels. This is
an OBSOLETE bus.
The cable uses a 9-Pin D connector. The pinout follows:
Pin 1: GND, Pin 2: GND, Pin 3: Red, Pin 4: Green, Pin 5: Blue, Pin 6:
Intensity, Pin 7: NC, Pin 8: Horizontal Sync, Pin 9: Vertical Sync.
GND = Ground, NC = No Connect
