T-Squared
Veteran Member
Yes, this is a continuation of my little experiments with my Sanyo. This time, I'm trying to feed an EGA signal into the monitor's cables (since basic EGA is at the same frequency as CGA)
I haven't blown up my monitor yet, because putting the video cable back where it was still produces a CGA picture, so that's a good sign. The other good news is that the computer is still starting and executing the operating system properly as well. I actually had to go through a few trials, because it seemed that my XTIDE was in addressing conflict with any of the EGA cards, and my DIP switches weren't set properly to use their video BIOS.
However, I can't get an EGA picture.
I have two cards, one of them (A Paradise PEGA1A Autoswitch) has a feature connector, the other one (A CHIPS CT-8090) doesn't because its connector socket was weak (I could not get inserted connector pins to reliably stay in the socket), so I removed it, and I'm planning to get a new one that's newer and stronger.
Anyways, to the point: I've found that the connector on the Paradise card is not outputting the proper H&V sync signals. No voltage at all. However, the RGBI signals work (albeit a bit weak too, but I think it's more that each particular signal is not switched on at that time. I've been testing it in pure DOS, and of course, it's all-black with a gray text prompt, so maybe only the Intensity bit is being used then.)
I don't know what's wrong, or if this feature was removed in the Paradise card. I'll talk about the other CHIPS card when I have a new socket header for it.
I haven't blown up my monitor yet, because putting the video cable back where it was still produces a CGA picture, so that's a good sign. The other good news is that the computer is still starting and executing the operating system properly as well. I actually had to go through a few trials, because it seemed that my XTIDE was in addressing conflict with any of the EGA cards, and my DIP switches weren't set properly to use their video BIOS.
However, I can't get an EGA picture.
I have two cards, one of them (A Paradise PEGA1A Autoswitch) has a feature connector, the other one (A CHIPS CT-8090) doesn't because its connector socket was weak (I could not get inserted connector pins to reliably stay in the socket), so I removed it, and I'm planning to get a new one that's newer and stronger.
Anyways, to the point: I've found that the connector on the Paradise card is not outputting the proper H&V sync signals. No voltage at all. However, the RGBI signals work (albeit a bit weak too, but I think it's more that each particular signal is not switched on at that time. I've been testing it in pure DOS, and of course, it's all-black with a gray text prompt, so maybe only the Intensity bit is being used then.)
I don't know what's wrong, or if this feature was removed in the Paradise card. I'll talk about the other CHIPS card when I have a new socket header for it.