Merlin Tonto / ICL one per desk : video pinout / cable - UK Vintage Radio Repair and Restoration Discussion Forum

francoistonic · 7th Feb 2022, 2:20 pm

Bonjour,

I try to boot Merlin Tonto. I've not monitor.

I make new PSU with meanwell PT (excellent documentation from this forum).

But : i cannot make video cable and find correct pins.

How to use LCD or VGA monitor with Tonto ? I don't understand video' pintout and how i can use it.

Maybe have you ideas or homemade

Mark1960 · 9th Feb 2022, 8:03 pm

Could you post some pictures, maybe a close picture of the connectors would let someone recognise the type of connector used.

dglcomp · 9th Feb 2022, 8:55 pm

Saw this online,

https://www.rwapsoftware.co.uk/onepe...ical_info.html

3.1. J3 - POWER AND VIDEO

15 way miniature 'D' Plug on Motherboard

Pin Function
1 Earth (video)
2 Red
3 Green
4 Blue
5 Horiz. sync
6 Vert. Sync
7 Earth
8 -5 volts
9 Earth
10 Monitor power
11 +5 volts
12 +5 volts
13 +12 volts
14 Powerdown
15 Csync
Notes:
Hold Pin 14 (Powerdown) at +5 volts for operation.

Looking on YT the connector appears to be a standard 15 pin D connector, the same used for the joystick/MIDI connector on PC's.

As it appears to have composite sync it should be pretty easy to convert it to RGB SCART, otherwise a CGA monitor/adaptor may work.

7th Feb 2022, 2:20 pm	#1
francoistonic Diode Join Date: Feb 2022 Location: Pontoise, France. Posts: 1	Merlin Tonto / ICL one per desk : video pinout / cable Bonjour, I try to boot Merlin Tonto. I've not monitor. I make new PSU with meanwell PT (excellent documentation from this forum). But : i cannot make video cable and find correct pins. How to use LCD or VGA monitor with Tonto ? I don't understand video' pintout and how i can use it. Maybe have you ideas or homemade

9th Feb 2022, 8:03 pm	#2
Mark1960 Octode Join Date: Mar 2020 Location: Kitchener, Ontario, Canada Posts: 1,297	Re: Merlin Tonto / ICL one per desk : video pinout / cable Could you post some pictures, maybe a close picture of the connectors would let someone recognise the type of connector used.

9th Feb 2022, 8:55 pm	#3
dglcomp Heptode Join Date: Jul 2016 Location: Portland, Dorset, UK. Posts: 874	Re: Merlin Tonto / ICL one per desk : video pinout / cable Saw this online, https://www.rwapsoftware.co.uk/onepe...ical_info.html 3.1. J3 - POWER AND VIDEO 15 way miniature 'D' Plug on Motherboard Pin Function 1 Earth (video) 2 Red 3 Green 4 Blue 5 Horiz. sync 6 Vert. Sync 7 Earth 8 -5 volts 9 Earth 10 Monitor power 11 +5 volts 12 +5 volts 13 +12 volts 14 Powerdown 15 Csync Notes: Hold Pin 14 (Powerdown) at +5 volts for operation. Looking on YT the connector appears to be a standard 15 pin D connector, the same used for the joystick/MIDI connector on PC's. As it appears to have composite sync it should be pretty easy to convert it to RGB SCART, otherwise a CGA monitor/adaptor may work.