[rescue] Recommended 13w3 to VGA adapter (Dave McGuire)

[Ethan Hawke]

No problem at all, the schematics for the CG3 are at the end of the 
L64825 technical manual, you can find it on datasheetarchive, search for 
L64825, but the file is called L64811 by mistake. (Not sure if I can 
post links, but let me know if you can't find it).

I don't have schematics for others unfortunately.

Cheers,
Ethan

On 8/3/22 02:44, Dave McGuire wrote:
>   No problem on my end, these things happen.
>
>   Where did you find the schematics for these boards, if you don't 
> mind my asking?
>
>           -Dave
>
> On 8/2/22 10:39, Ethan Hawke wrote:
>> Yes, I seemed to have overstepped, honestly I only checked the CG6 
>> and it was SoG/CSYNC, and just assumed it was similar among the 
>> others such as the CG3 as they all looked identical on my monitors, 
>> indeed after checking the schematics (which I honestly should have 
>> done first) the CG3 is separate VSYNC/HSYNC and doesn't have CSYNC or 
>> SoG at all.
>>
>> I'm not sure for the FFB, but the service manual for the U1/U2 
>> indicate HSYNC/VSYNC, but I haven't checked.
>>
>> Sorry about the error Dave, my bad.
>>
>> Cheers,
>> Ethan
>>
>> On 2/08/2022 10:29 am, Dave McGuire wrote:
>>> While I've never looked at the green signal with an oscilloscope, 
>>> but I can tell you that there are in fact hsync and vsync signals on 
>>> the pins of the DB13W3s, and using cables that don't have the pins 
>>> populated cause the monitors to fail to sync up.
>>>
>>> B B B B B B B B B B  -Dave
>>>
>>> On 8/1/22 20:04, Ethan Hawke wrote:
>>>> All the main Sun framebuffers (cg3, cg6, ffb) are all 
>>>> sync-on-green. And SoG still seems to have common support today, 
>>>> but I haven't extensively tested different monitors.
>>>>
>>>> Cheers,
>>>> Ethan
>>>>
>>>> "Dave McGuire" mcguire at neurotica.com b 2 August 2022 6:03 AM
>>>>> On 8/1/22 15:15, Ron Pool wrote:
>>>>>> I've used these with a SPARCstation 2, SS IPC, and SS 20 and 
>>>>>> various older 4:3 and widescreen LCD monitors with VGA inputs:
>>>>>>
>>>>>> www.ebay.com/itm/280752640620
>>>>>>
>>>>>> I like them because instead of being an adapter that ends up 
>>>>>> adding length to the rigid bits that plug in to and through 
>>>>>> gravity and bumping this add stress to video connectors, it's 
>>>>>> instead a complete cable with normal size plugs on the ends.
>>>>>>
>>>>>> I think I've been mostly lucky with these monitors just working 
>>>>>> with my various SPARCstations. But I did pick out those monitors 
>>>>>> because web searches made me pretty confident all the used LCD 
>>>>>> displays I buy support sync on green, which I somewhere picked up 
>>>>>> is a thing that is needed for monitors that connect to 
>>>>>> SPARCstations. I don't know the sync on green is really a 
>>>>>> requirement, but I've had no problems at all with the few 
>>>>>> sync-on-green capable VGA LCD monitors that I've used on 
>>>>>> SPARCstations
>>>>>
>>>>> Suns typically don't do sync on green; they have separate sync pins
>>>>> on the DB13W3 connector. Many other workstation-class machines do
>>>>> sync-on-green, though.
>>>>>
>>>>> -Dave
>>>>>
>>>>>
>>>
>>>
>>
>> _______________________________________________
>> rescue list - http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
>
>