Preferred way of substituting TFT for CRT Monitor?

[r.stricklin]

The 98549A board is 1024x768, 6 planes (4 color, 2 overlay, at least under HP VUE -- perhaps there's a way it can make use of all 6 planes for color, but I don't know how). Otherwise, that matches what I've observed here.

ok
bear.

On Jan 21, 2016, at 8:51 AM, <Martin.Hepperle at dlr.de> <Martin.Hepperle at dlr.de> wrote:

> Yesterday I checked the 9000/217 98204B combo with my oscilloscope and  I can confirm the 25kHz horz. frequency (1V down to 0.3V pulses every 40 us).
> I cannot measure the pixel clock as my oscilloscope was too cheap (I had to compromise) and thus cannot sample at higher MHz rates. I only see that it goes from 1V to approx. 2.2V.
> Just for my understanding: if I do the math: 512 pixels x 400 rows = 204'800 pixels at 50 Hz I end up with 10.2 MHz and at 60 Hz = 12.3 MHz.
> There is more "room" required for the retrace time, probably another 10% or so?
> So I understand that the monitor must be capable of ~25 kHz and 10...14 MHz and that I better try before buy.
> 
> It is difficult to find specs for these HP 9000 video boards.
> In case it is useful for someone ... my list below is still missing DIO-bus type (1 or 2) and signal frequencies.
> 
> 98204B Video Board               medium resolution (512x390)    monochrome for 35721 monitor, DIO-1
> 98542A Monochrome Video Board    medium resolution (512x400)    monochrome
> 98543A Color Video Board         medium resolution (512x400)    16 colors
> 98544B Monochrome Video Board    high resolution (1024x768)     monochrome
> 98545A Color Video Board         high resolution (1024x768)     16 colors
> 98546A/B Monochrome Video Board  medium resolution (512x390)    monochrome alpha/graphics, for 216/217 display compatibility
>       (a pair of cards, compatible with 2136 and 217 displays (512x390, 25x80))
> 98547A Color Video Board         high resolution (1024x768)     64 colors
> 98548A Monochrome Video Board    high resolution (1280x1024)    high performance
> 98549A Color Video Board         high resolution (1280x1024)    high performance
> 98550A Color Video Board         high resolution (1280x1024)    high performance
> 98700A Graphics Display Station  high resolution (1024x768)     256 colors
> 98710A Graphics Accelerator      optional for 98700A
> 98720A High Performance Board    high resolution (1280x1024)     nur HP-UX, requires 98724AA interface and 98784A monitor
> 98730A High Performance Board    high resolution (1280x1024)     nur HP-UX
> 98722 memory upgrade             optional for 98720A
> 
> Martin
> 
> 


-- 
until further notice