classics

Bad RAM chips are probably the most common 5200 failure. Here is a small program that will run on a console even if you take out all the RAM chips and show which chip or chips are not working.

This will only identify bad DRAM that are fully non-functional, though most DRAM do fail that way. Bad/missing DRAM will show a red bar, working ones a green bar.

The u# shown on the screen are for the 4-port 5200. I don't have a schematic of the 2-port model handy to see if they have different PCB markings.

The ROM attached is a standard 32K binary. You can use any type of reproduction board to make a cart. If you can't make a cart yourself Albert may still make them, or you can PM me and I will try to find time to make a few.

You can load this from the Ultimate SD menu, but the Ultimate SD already requires working RAM, so running it from there is not possible on a system with bad ram. For those cases I have attached a specially packed core_boot.rom that can be used to replace the Ultimate SD standard boot rom. This requires re-flashing your SD cart back to the standard boot rom after use. More information is in the "readme_first.txt" file in the archive about this procedure.

If this program fails to run on the non-working 5200 console then the problem is probably bigger than just a bad RAM IC and you can start looking more deeply for other issues.

Steve

Does anyone have any of the Opcode style Colecovision game cases for sale?

Please PM with your asking price if you do, I can buy a few, or up to a few hundred.

I'm considering just having my own mold made since these don't seem to be very available anymore, but I figured I'd see if anyone has a bunch left over from the last run before I go to the trouble.

Thanks,

Steve

Here is the third new 5200 conversion to go along with the Ultimate SD Cartridge release.

Shamus: Case II



Gameplay Video



The ROM image and a text manual formatted in 40 columns for use on the Ultimate SD is attached.

More information about the 5200 Ultimate SD Pre-Order is available in the Marketplace thread:

http://www.atariage....-now-available/

Steve

Ok, here is the second of three brand new 5200 conversions to go along with the Ultimate SD Cartridge release.

Necromancer



Gameplay Video



The ROM image and a text manual formatted in 40 columns for use on the Ultimate SD is attached.

More information about the 5200 Ultimate SD Pre-Order is available in the Marketplace thread:

http://www.atariage....-now-available/

Steve

As promised here is the first of three brand new 5200 conversions to go along with the Ultimate SD Cartridge release.

Laser Gates



Gameplay Video



The ROM image and a text manual formatted in 40 columns for use on the Ultimate SD is attached.

I don't have single game carts available for sale, but I'm sure the usual suspects will make them on request.

Steve