Anyone have a good US TOS 1.04 / 1.4 six chip set of images?

[cbelcher]

I dusted off my old 1040 STF - TOS 1.0 and was hoping to upgrade to 6 chip TOS 1.4 to do so some work with ASCI projects. TOS images have been easy to find ( http://www.avtandil.narod.ru/tose.html), and I have split them using various programs in the emulators - but I can't get an upgraded rom to boot - it always bombs out with 8 or more.

 

Funny thing is I can boot to TOS 1.0 on a 27c512 with the dual boot modification ( http://atari4ever.free.fr/hardware/zip/dual_tos.zip), but when I switch to 1.04 (before booting) it bombs out.

Also burning a split set of 1.4 roms to 27c256 and being careful about their sockets - I still bomb out on boot.

The ROMs verify on the burner and apparently I can do well with TOS1.0...

 

Any ideas? Anyone have a good 6 chip set of ROMs or some advice? Thanks!

[ParanoidLittleMan]

Bad image and/or bad splitting SW. Can you post here 6 images which you burnt into EPROMs ? (ZIPped) . Just to check them.

[cbelcher]

This is the original "hack" mentioned above - with the combined 1.0/1.4 (to be burned into a 27c512)- I can only get the 1.0 to boot when selected, the 1.4 bombs

And the 1.4 that I split from a web image on the emulators (to be burned into a 27c256) - it bombs

 

thanks!

dual_tos (1).zip

TOS 104 split.zip

[ParanoidLittleMan]

I checked - it is US 1.04, and splitting is OK. All I can now think is that problem is because age of computer, and it works not 100% reliable. Some SW passes, some not.

Recommending for start to go into replacing of electrolyte capacitors in PSU - that's very typical problem. Especially if machine was not powered on for many years.

[cbelcher]

Thank you for checking. It's an old US 1040STF - rev C motherboard. Will replace the caps and see - very strange. I even verified the ROM chips I burnt vs the files and they checked out...