hueyjones70 Posted December 21, 2018 Share Posted December 21, 2018 I recently bought a non-working 800XL. The non-working was caused by bad memory chips. It turned out to be a PAL version. I only get black and white on my monitor even when I use composite for chroma. I haven't hooked up the chroma line yet. Will it give me color? What differences will exist between the PAL and a NTSC computer during normal use. Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted December 21, 2018 Share Posted December 21, 2018 All games that rely on vertical blank interrupts for timing will appear to run about 13% slower on PAL compared to NTSC. (50 vs 60 hz) But PAL machines can run a lot more of the hardware intensive demos that primarily originate from programmers with PAL hardware that don't, or barely work on NTSC timing. Quote Link to comment Share on other sites More sharing options...
shoestring Posted December 21, 2018 Share Posted December 21, 2018 Hello. Do you have the chroma pin hooked up in the 800xl ? This sounds normal though. Using chroma/luma might fix it as it has for some folks. Not for me though, I hooked up my NTSC 800 to my PAL 1084 via Y/C, and I get the same back and white image. So I gave up and bought a PVM. Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted December 21, 2018 Share Posted December 21, 2018 or you could build the NTSC section in and swap the crystal.... then install the dual ANTIX mod etc etc. 1 Quote Link to comment Share on other sites More sharing options...
Rybags Posted December 21, 2018 Share Posted December 21, 2018 Chances are the monitor expects the NTSC colour carrier frequency. Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted December 21, 2018 Share Posted December 21, 2018 chroma on the PAL 800xl is not connected, there is a mod you can do to sort it tho. Here is a guide to make SVideo work that refers to it: It would all depend on your MoBo revision. In general terms, all you need to do is:1. REMOVE C56 capacitor (if present). This will dramatically improve sharpness and "edge"-definition.2. Lift C54 right-hand side, preferably by inserting an on-off switch (if you want to preserve composite out). This will almost COMPLETELY remove vertical banding (present on Luminance-Y signal).3. Solder Chroma-signal wire from R67/R68 junction, to chroma pin in video port. This will enable the missing chroma-signal on the 800XL (the majority DO NOT have it enabled). No need for pick-up resistor (of any kind).THAT'S IT. Quote Link to comment Share on other sites More sharing options...
Level42 Posted December 23, 2018 Share Posted December 23, 2018 or you could build the NTSC section in and swap the crystal.... then install the dual ANTIX mod etc etc. AntiX and Sophia and you're in heaven Quote Link to comment Share on other sites More sharing options...
hueyjones70 Posted December 24, 2018 Author Share Posted December 24, 2018 I hooked up the chroma circuit and I still only get black and white. Quote Link to comment Share on other sites More sharing options...
hueyjones70 Posted December 24, 2018 Author Share Posted December 24, 2018 Where can I buy a SOPHIA? Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted December 24, 2018 Share Posted December 24, 2018 I hooked up the chroma circuit and I still only get black and white. This is normal behavior for a PAL machine connected to NTSC 1 Quote Link to comment Share on other sites More sharing options...
jowi Posted December 24, 2018 Share Posted December 24, 2018 Where can I buy a SOPHIA? Send a pm to Simius (the developer of Sophia). More info in the Sophia thread: http://atariage.com/forums/topic/274004-sophia-revc-dvi-board/ Quote Link to comment Share on other sites More sharing options...
hueyjones70 Posted December 28, 2018 Author Share Posted December 28, 2018 Does the UAV-D work on the PAL computers. Quote Link to comment Share on other sites More sharing options...
Thorsten Günther Posted December 30, 2018 Share Posted December 30, 2018 I hooked up the chroma circuit and I still only get black and white. I suppose your TV set does not have PAL decoding built into it then (strange, as I was under the impression that until recently pretty much all of the modern TV sets come with a triple-standard video input decoder (NTSC, PAL, SECAM), as here in Europe they all had one, e.g.: https://www.displayspecifications.com/en/model/6a3a15bd Quote Link to comment Share on other sites More sharing options...
hueyjones70 Posted December 30, 2018 Author Share Posted December 30, 2018 I was using an old Magnavox monitor, yesterday I tried it on a newer flat screen TV and I have color. I think I will install a UAV on it. Quote Link to comment Share on other sites More sharing options...
Swami Posted December 30, 2018 Share Posted December 30, 2018 I was using an old Magnavox monitor, yesterday I tried it on a newer flat screen TV and I have color. I think I will install a UAV on it.Your flat screen is probably PAL compatible. Most Newer LCD TVs are while almost all crt s are not PAL compatible. Quote Link to comment Share on other sites More sharing options...
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