On Wed, Jun 7, 2023 at 2:26 PM Jonathan Katz via cctalk < cctalk@classiccmp.org> wrote:
> I have an IBM 6152 aka IBM RT system I rescued. (It may be a 6151?) > I'm 90% sure it has colour graphics. The system does seem to POST > correctly (according to the LED on the front) but the CRT is dead. I'm > wondering if anyone has built an adapter to hook this to a VGA > monitor. > > Do you have the Megapel adapter in your 6151 with the 3W3 connector? I have one in my 6150 and I was able to connect it to a VGA monitor (NEC Multisync) and I think I only created an adapter to go from 3W3 to Red, Green and Blue RCA plugs (component) that then went into a simple RGB component to VGA wired adapter (about 6 inches long) I already had. Part of the magic might be in that multisync monitor though. Here it is running AIX: https://vintagecomputer.ca/wp-content/uploads/2023/06/IBM_PC_RT_running_AIX.jpg I got the 3W3 connector and parts from Digikey. Here's what that looks like: https://vintagecomputer.ca/wp-content/uploads/2023/06/IBM_RT_3W3_RGB-rotated.jpg Please forgive the crude construction. I didn't think it would work but it did. Here is the RGB component to VGA adapter I also used: https://vintagecomputer.ca/wp-content/uploads/2023/06/RGB2VGAadapter.jpg Hope this helps. Santo
