More out of stubbornness than any practical reason, I'd like to get a monitor working with the internal video on my IIci. Please feel free to skip over all of the narrative below and jump to the last paragraph, where I actually ask the relevant question.
Well, if I were to come up with a justification, it's that I'm thinking my Toby video card that's currently working with it is going to give up the ghost at some point. I'm amazed that it works now, actually - I accidentally left out in the elements (including a couple of rain storms) for about 3-4 months after I acquired it. In my defense I had been told that the whole stack of cards was nonfunctional... so imagine my surprise when in a fit of desperation to actually get my IIci *working*, after failing to get any sort of video signal out of it at all, I plugged in the rusted out Toby card and got a nice stable 640x480 8bit picture out!
So fast forward to now, when I am once again interested in trying to sync with the internal video signal.
I had been using this IIci (and a Q650 & PM 8500) with a Dell P1914S.. which works and looks great with the exception that it's 5:4 native rather than 4:3, and I don't see a way to have it scale with a constrained aspect ratio.. so geometry is always a little off when using it with 4:3 resolutions, such as the 640x480 that I'm stuck with, with the Toby.
The story might have ended there, if the P1914S would sync with 1152 x 864 @ 72Hz... but it only syncs at that resolution at 68Hz. What relevance does this have, you might wonder? It means that it will only sync with my ADB NextStation when it boots without the monitor cable connected, forcing it to fall back to the non-ADB refresh rate of 68Hz rather than the native 72Hz. So, in order to no longer have to deal with cable swapping on every boot, I picked up a NEC MultiSync 2090UXi, which is 4:3 native and supports the NextStation's native frequency.
The thought crossed my mind, that maybe this NEC display would sync with the IIci's internal video signal but... no dice.
Which, finally!, brings me to my questions... What are the particulars of the video signal? 75Hz 640x480 w/ sync-on-green? That.. doesn't seem too outlandish for a modern(ish) display right? Beyond that, how can I verify that the video circuitry is working, absent a compatible display? Are there things to rule out - like SIMMs being present in bank 0.. anything else?
Well, if I were to come up with a justification, it's that I'm thinking my Toby video card that's currently working with it is going to give up the ghost at some point. I'm amazed that it works now, actually - I accidentally left out in the elements (including a couple of rain storms) for about 3-4 months after I acquired it. In my defense I had been told that the whole stack of cards was nonfunctional... so imagine my surprise when in a fit of desperation to actually get my IIci *working*, after failing to get any sort of video signal out of it at all, I plugged in the rusted out Toby card and got a nice stable 640x480 8bit picture out!
So fast forward to now, when I am once again interested in trying to sync with the internal video signal.
I had been using this IIci (and a Q650 & PM 8500) with a Dell P1914S.. which works and looks great with the exception that it's 5:4 native rather than 4:3, and I don't see a way to have it scale with a constrained aspect ratio.. so geometry is always a little off when using it with 4:3 resolutions, such as the 640x480 that I'm stuck with, with the Toby.
The story might have ended there, if the P1914S would sync with 1152 x 864 @ 72Hz... but it only syncs at that resolution at 68Hz. What relevance does this have, you might wonder? It means that it will only sync with my ADB NextStation when it boots without the monitor cable connected, forcing it to fall back to the non-ADB refresh rate of 68Hz rather than the native 72Hz. So, in order to no longer have to deal with cable swapping on every boot, I picked up a NEC MultiSync 2090UXi, which is 4:3 native and supports the NextStation's native frequency.
The thought crossed my mind, that maybe this NEC display would sync with the IIci's internal video signal but... no dice.
Which, finally!, brings me to my questions... What are the particulars of the video signal? 75Hz 640x480 w/ sync-on-green? That.. doesn't seem too outlandish for a modern(ish) display right? Beyond that, how can I verify that the video circuitry is working, absent a compatible display? Are there things to rule out - like SIMMs being present in bank 0.. anything else?
