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So I am trying to figure out what are the supported resolutions of the color classic LB with an external monitor in place of the original 10“ CRT. The schematic attests that it is possible to drive a 640x480 monitor from the CC frame buffer - this could allow i.e. to drive the 640x480 AB...

Use the old PSU as a housing for a new modern Mean Well RPT-60A module!

The lines labeled HPOUTL and HPOUTR (14) are the lines that go to the AB for amplification.

The audio chip on the 575 LB is U1, DFAC-II. Here’s a snippet of the audio circuit on that LB.

The Color Classic has the sound power amp on the AB, and the circuit is the same as in the 575, except in the CC it only has a mono output (the 575 is stereo). it is very simple, a couple resistors, two caps and a single TDA7052B ic. however, If the noise also comes from the rear headphones jack...

So I got a Kalea Informatique card off amazon, and found out it has the 12v fw chip, I have a AT29C010A chip I got for a different project (replacement of an Adaptec 2940 SCSI card) and I wanted to know if I could use it here for on-card flashing?

Looks pretty much like a standard harness to me. lets see if we get confirmation from someone else just to be on the safe side, however you would need the video out board anyway so….

Hey Robin, I am not 100% sure the harness is compatible, however if you show me the connectors I may be able to help you. That is because the 5x00 has internal video and I do not remember if it had a different connector to the AB. if the harness was from any 630 all the way to the 6500 it would...

Cory, is there a way to know if a ROM is a replacement? Like some part number or so? I can post detailed images of both sides.

Hoagie, I’m in Italy, so shipping should not break bank. And I don’t know how expensive you're thinking, but I would part from it for 10 euro… however … 6200 boards should not be more expensive than 50 euro plus s&h. I sold my last one a few months back unfortunately - and rather than spending...

IMHO I seem to detect from diverse directions some form of subtle bias towards Phipli which in my limited experience on this forum is misplaced. I consider him a valuable asset to the forum, a knowledgeable, helpful and extremely patient guy. My impression and not to criticize anyone as I want...

Turns out I do…

Where are you located? I may have a cache/ROM simm for the 6200 lying around.

MW RPT-60 here as well, in a loaded out LC475 and OC‘d cpu to 33Mhz, all really good could not recommend better.

interesting. I may have the SGRAM chips on some old ATI board for PC, I could piggyback them on- would that possibly damage the board?

Phipli I was not aware of this, and actually is very, very interesting.

Wouldn’t count on that, some hoarder website may purchase them all and then trickle resell them at like 50x the cost, like many other semi before.

I want one!

I’d love to try this out…

Very interested, as I also would love to have a simple “bong” and system sounds without having to connect the HK loudspeakers - which I do not own