800XL PAL

[hueyjones70]

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.

[+Nezgar]

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.

[shoestring]

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.

[_The Doctor__]

or you could build the NTSC section in and swap the crystal.... then install the dual ANTIX mod etc etc.

[Rybags]

Chances are the monitor expects the NTSC colour carrier frequency.

[xrbrevin]

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.

[Level42]

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

[hueyjones70]

I hooked up the chroma circuit and I still only get black and white.

[hueyjones70]

Where can I buy a SOPHIA?

[+orpheuswaking]

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

[jowi]

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/

[hueyjones70]

Does the UAV-D work on the PAL computers.

[Thorsten Günther]

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

[hueyjones70]

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.

[Swami]

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.