exxos's Atari, Amiga & retro forum

PaulJ wrote: 15 Apr 2019 00:35 Thanks Exxos, since its stone cold gotta be something stupid I should be able to find with a ohm meter. :)

My silly mistake was that I'd accidentally shorted two wires on the jumpers, thanks to a solder blob when doing the caps and resistors.

zack4mac wrote: 15 Apr 2019 06:54 Will this board see production for the store or is it be incorporated into the STF remake?

The current board is testing the design. There will be a production board but likely not anytime soon.

Groovy :yay2:

The best things come to those who wait

Cheers Exxos

PaulJ wrote: 14 Apr 2019 23:55 2. I can I get a schematic so I can put the ohm meter to work?

PaulJ wrote: 14 Apr 2019 23:55 3. Any words of wisdom?

Don't touch the hot end of the soldering iron :)

Finally took delivery of the caps and resistors for the select 1 and select 2 jumpers, so they will be getting done as soon as I can find time, which is likely to be Wednesday evening.

I have my TOS 1.04/2.06 ROM now too, and my programmer is now fixed so I can flash 27C4096 ROMS happily.

Last thing will be to sort out a test board that has removable TOS ROMS, as the one I'm using (C103253) doesn't. Looking like my spare CO70789 will be getting the job, which is also a help since it has 1MB installed.

exxos wrote: 15 Apr 2019 12:42

PaulJ wrote: 14 Apr 2019 23:55 2. I can I get a schematic so I can put the ohm meter to work?

ide.zip

PaulJ wrote: 14 Apr 2019 23:55 3. Any words of wisdom?

Don't touch the hot end of the soldering iron :)

Thanks for the schematic Exxos.... Yes after the picture of the damage done to RJ's digit I'm surprised RJ was able to get back up on that horse so soon. A lesser man would still be cowering in the closet.. :mrgreen: I ask the wife if the worst were to happen if I could use her cooking gloves and I was told in no uncertain terms I'd better be careful because she wasn't loaning them to a klutz that would pick up the business end of the iron..:) :) :) So in essence there is no room for error here. I should be using the scope here for awhile so in the immediate future I should be safe. :mrgreen: :mrgreen: :mrgreen:

PhilC wrote: 15 Apr 2019 08:37

PaulJ wrote: 15 Apr 2019 00:35 Thanks Exxos, since its stone cold gotta be something stupid I should be able to find with a ohm meter. :)

My silly mistake was that I'd accidentally shorted two wires on the jumpers, thanks to a solder blob when doing the caps and resistors.

Ya, I went over the joints with the microscope and everything looks fine. I am wondering about the 84 pin PLCC socket. Some of the corner pins on the device had been bent a little.

Yes, that sounds promising Paul as mine detected the drive right after I fixed my bodge.

BTW, the 44 marking is pin 1 :lol:

Ok, I found an anomaly I believe. According to the schematic IORDY is connected from pin 27 on the IDE connector through a 100 ohm resister to pin 6 on the sip to pin 62 on the plcc. I'm missing the connection from pin 62 on the plcc to pin 6 on the sip. It appears to be mixed up with the Icky specified fixes. Is the schematic correct in this area? :?: :?: :?:

PaulJ wrote: 15 Apr 2019 22:02 Ok, I found an anomaly I believe. According to the schematic IORDY is connected from pin 27 on the IDE connector through a 100 ohm resister to pin 6 on the sip to pin 62 on the plcc. I'm missing the connection from pin 62 on the plcc to pin 6 on the sip. It appears to be mixed up with the Icky specified fixes. Is the schematic correct in this area? :?: :?: :?:

I'll check the schematic it might be the corrected one.