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Member Since 11 Apr 2010
OFFLINE Last Active Today, 9:28 AM

Posts I've Made

In Topic: Atari 800 S-Video Problem

Yesterday, 1:36 AM

Could the color differences be due to CTIA vs. GTIA? Do you know which chip your 800 has?


I don't remember any color difference between the CTIA & GTIA, but is has been over 30 years since I have had a CTIA. The GTIA does have more video modes.


The color on the Atari computers can be adjusted via a potentiometer.


On the 800 this potentiometer is on the CPU card, and can be adjusted through a hole on the back of the RF shield when the cover for the RAM/OS card bay is removed.

In Topic: Anyone sell an Atari 400 capacitor kit?

Wed Feb 14, 2018 4:52 AM

For posterity and to help with the project, as it may be needed someday... maybe someone would be inclined to post the 400's build out sheet or maybe he could simply look through a bunch of photo facts etc.

The parts list for the 400 is already in the back of the 400-800 Home Computer Field Service Manual, available at Atarimania.


Tue Feb 13, 2018 10:25 PM

The speedscript 80 looks pretty good. I think the type is easier to read than the Last Word but that is probably due to the screen colors. If Last Word used white on black it would probably be much easier to read.

According to the v3.21 manual the screen color in Last Word is adjustable, the default value is 148 but can be set from 0 to 255.

In Topic: Another unknown EPROM...

Sun Feb 4, 2018 2:26 AM


Looks like somebody knew what they were doing when they did the mods for my 810 sideboard.  Thanks for the manual.  By the way...

Did they make an Archiver chip for the 1050 too?



B&C/myatari.com sells a Super Archiver upgrade for the 1050.

In Topic: 822 Thermal Printer

Fri Feb 2, 2018 2:20 AM

Here is a picture of where the connector attaches:


Pin 1 is in the lower left corner and pin 20 is in the upper right corner (connector is at the left edge of the picture). I wonder if I can just make a straight connection to the 850 printer port with IDC connectors and ribbon cable?

Chips are 74LS373N, ULN2805A and 74LS175N.

Very much doubt that a straight thru ribbon cable would work, the 850 printer port is only 15 pins and AFAIK the pinout is unique. The only other devices I know of that use the same pinout are the ICD MIO and P:R:Connection, and this was for compatibility with 850 cables.