STe/ST video out port Q's

General discussions or ideas about hardware.
Post Reply
Steve
Posts: 2007
Joined: Fri Sep 15, 2017 11:49 am

STe/ST video out port Q's

Post by Steve »

I'm going to be making myself something that plugs into the RGB port, providing a mono on-off switch & sound output. (To be used in conjunction with rgb2hdmi, so I can swap between colour/mono and have sound output)

Looking at the schematic, is it true that grounding pin 4 of the connector will enable mono mode?

Also for sound output, does the STe output stereo or mono from the monitor port? I can only see audio going to pin 1, but there is also something called AUDIOI on pin 5. Can I wire it up so that I can get mono out when plugged into an ST, and stereo when plugged into an STe?


Screen Shot 2022-06-23 at 14.44.47.png
Screen Shot 2022-06-23 at 14.44.47.png (310.96 KiB) Viewed 209 times
User avatar
rubber_jonnie
Moderator
Moderator
Posts: 6832
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: STe/ST video out port Q's

Post by rubber_jonnie »

I'm reasonably sure that it will be mono sound (Or L&R mixed) that is sent out on Pin 1. I also think the MONO pin to GND statement is true.

Pin 5 on the other hand, or AUDIOI is audio in and not another audio out. It takes an external audio stream and mixes it with the Atari sound before sending it out on pin 1.

Have a look at the Atari video connector here: Atari connectors it'll give you a much clearer view of what the pins do.

Of course on the STE you have phono style audio sockets for L&R, that's a better place to take audio from, especially since I don't think you'd have enough spare pins on the 13 pin DIN socket to allow for L&R channel output.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Steve
Posts: 2007
Joined: Fri Sep 15, 2017 11:49 am

Re: STe/ST video out port Q's

Post by Steve »

Cheers @rubber_jonnie :)
User avatar
rubber_jonnie
Moderator
Moderator
Posts: 6832
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: STe/ST video out port Q's

Post by rubber_jonnie »

Steve wrote: Thu Jun 23, 2022 3:57 pm Cheers @rubber_jonnie :)
No worries.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Steve
Posts: 2007
Joined: Fri Sep 15, 2017 11:49 am

Re: STe/ST video out port Q's

Post by Steve »

Voila, the fruits of my labours:
(These plug into the back of an ST that has RGB2HDMI installed providing a switch to change between colour and mono plus an audio output, now I don't need to use my ST-VGA adaptors for this purpose anymore)

PXL_20220626_103317192.jpg
PXL_20220626_103317192.jpg (436.35 KiB) Viewed 88 times
Post Reply

Return to “HARDWARE DISCUSSIONS”