Franklin Ace 1000 Repair: Motherboard and Keytronic keyboard
ฝัง
- เผยแพร่เมื่อ 21 ส.ค. 2020
- #appleclone #franklinace #appleIIforever
Time to troubleshoot and fix the broken Franklin Ace 1000. The Keytronic keyboard needs to be refoamed and then the crashing issues need to be found and fixed.
Part 1: • Apple II+ Clone: Insid...
Part 2: This part!
--- Video Information
More on the Franklin Ace 1000:
oldcomputers.net/ace1000.html
www.vintage-computer.com/fran...
Texelec Foam Pads for all Keytronic keyboards:
texelec.com/product/foam-capa...
--- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.16...
Jonard Tools EX-2 Chip Extractor:
amzn.to/2VazxDS
www.jonard.com/Products/EX-2-...
Wiha Chip Lifter:
amzn.to/3a9ftWw
www.wihatools.com/precision-c...
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
www.rigolna.com/products/digi...
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
www.aliexpress.com/item/33000...
TS100 Soldering Iron:
amzn.to/2K36dJ5
www.ebay.com/itm/TS100-65W-MI...
EEVBlog 121GW Multimeter:
www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
www.ebay.com/itm/USB-Logic-DS...
Magnetic Screw Holder:
amzn.to/3b8LOhG
www.harborfreight.com/4-inch-...
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
www.ebay.com/itm/14-16-18-20-...
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
www.ebay.com/itm/1-2-5-10PCS-...
Heat Sinks:
www.aliexpress.com/item/32537...
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/misterblack1?tab=r...
Commodore Computer Club / Vancouver, WA - Portland, OR - PDX Commodore Users Group
www.commodorecomputerclub.com/
--- C64 Stuff
JaffyDOS:
blog.worldofjani.com/?p=3544
C64 Test Harness I use:
• Building a Commodore 6...
C64 Homebrew cartridge PCB: (used for the DeadTest / Diag Cart I use)
www.ebay.com/itm/Commodore-64...
EasyFlash 3 Multi-Cart:
store.go4retro.com/easyflash-3/
--- Instructional videos
My video on damage-free chip removal:
www.youtube.com/watch?v=XQVjw...
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
Outro Music:
Abyss by | e s c p | escp-music.bandcamp.com
Music promoted by www.free-stock-music.com
Attribution 4.0 International (CC BY 4.0)
creativecommons.org/licenses/... - วิทยาศาสตร์และเทคโนโลยี
![[UNCUT] ฝันรักห้วงนิทรา | EP.9 (3/4)](http://i.ytimg.com/vi/ikd1tEhXbp8/mqdefault.jpg)
I sent Adrian the schematics and technical service bulletins for this ACE 1000 last week. I worked for a Franklin service center.
Thanks for the Chris! It would have saved so much time when I was fixing this machine.
Maybe they could be scanned and put up on 6502.org or something of that nature so that they could be available to all? That would be great!
Chris A850 You’re our hero!
Would be nice to share them in appropriated foruns for the retro comunity also. Could be out there some more "Adrian Black" guys. Be safe!
@@uni-byte Archive.org if nothing else.
The 8-Bit Guy had trouble with his home made solution for those keyboards. He eventually ordered the pads you got and they worked fine.
Great video as usual.
Kendall Tawes agreed 👌
It's absolutely amazing that people are capable of troubleshooting things like this. Shaking my head in positive disbelief. Great work, Adrian.... It's such a pleasure to have watched you turn a literal mouse piss corroded motherboard into a functioning computer. Man, I love this channel!!
I really enjoyed this series. I feel like I've learned more about how memory selection/decoding works by watching you debug and diagnose machines like this than anything I've read in repair manuals/certification materials.
The way you were using the basic commands to read/write to memory locations to check and verify the results back made perfect sense. Having this ability in older machines, I get now why computers were considered more of a hobbyist device rather than an everyday item like they are now. It also makes me wish we had this same capability in modern machines rather than limited tools provided by different flavors of EFI available on the motherboards.
Who knew the Franklin Ace came with a mouse?
Not knew that it came with mouse remains, though.
*golf clap*
You have a nice channel. I subbed.
28:59 When Adrian gets excited I get excited!
Yeah same here; His emotions are quite contagious i find.
This was a great set of videos! Thank you! The first personal computer I ever used was an original Apple II in elementary school. Shortly after, my school bought 3 of the Franklin Ace 1000’s and I really wanted one! I would stay after school to use them. I have not touched one since. The first computer I owned was a couple years later when I bought a Commodore 64. These videos make me want to hunt down a Franklin now!
That actually partially reminds me of how I diagnosed my C64. It had 439 bytes free I think, but BASIC was working. I found a BASIC program that pokes 0 into about 32k and then tests for 0 and then pokes 255 into the same 32k and tests for 255. In both cases where I had errors (39 in total) it was off by 128 exactly. That's U12.
Ok, I’m impressed with the going into assembly mode. Nice!
18:36 - It looks like bit 3 is permenantly set "00000100", which is why you get a 4 in the address. When you wrote the 0xAA, if you or it with the broken bit you would get 0xAE ( "0xAA | 0x04 = 0xAE )", and when you wrote 0xCC it didn't change because 0xC is 1100 in binary, so bit 3 is already set.
21:06 - Looks like you figured that out!
The scabby black color you see on some DIP leads is silver tarnish. TI and some other companies actually silver plated the leads rather than tinning them. Silver oxidizes to black.
Simply brushing a little liquid silver cleaner onto the chip leads will clean them up to being shiny again. A quick rinse in plain water will get the silver cleaner off, and they are good to go.
Indeed -- a few others have mentioned that too. I'll need to buy some and try it out. I haven't found it to cause any problems specifically - on these chips, the one I showed actually had full on corrosion (it was bumpy and felt rough) but most of them just had the leg blackening.
One of my favorite things with your videos are the talking hands. My wife walked by when I was watching and she thought it was some kind of comedy routine. All kidding aside, I started with PCs back in 1983 and enjoy going back in time with you. Keep 'em coming!
Your ability to fix these machines is off the chart. Really enjoyed this video.
This was fun! Good diagnostics, great repair. One of your best videos.
Adrian is the GOAT Troubleshooter. Well done! How your brain works is totally sci-fi.
Absolutely awesome troubleshooting, as usual, Adrian!!
Great video!! Gave me lots of ideas for troubleshooting my own projects!!
Congrats on getting your original Franklin working!!!
Wonderfully logical reasoning and diagnosis, thank you for sharing this series Adrian.
Lots of great troubleshooting and a nice variety of solutions. Good stuff!
It ain’t a Saturday without an ADB repair video!
Awesome detective work! Great job resurrecting that machine.
Well done Sir! well done indeed, I know nothing about anything you did but I still enjoyed watching the troubleshooting process.
This is becoming my new favorite channel.
Great way to start my Saturday!
Agreed. I love Adrian's content. It is real and genuine. You can tell that Adrian is an honest and good person. The content always takes me back to my teens and I just really enjoy the way Adrian creates the troubleshooting content. This is definitely one of my most favorite TH-cam channels, by far. Thanks again Adrian!!
Huge effort Adrian. Congratulations on another successful repair. Learned a lot as usual, thanks
Good job figuring out the address line issue. However, not that you could run it, but that memory test that Applecillin did would have worked before you fixed it too - it looked like it went sequentially through memory, testing 1 byte at a time, writing a few values (maybe 00, AA, FF or some variation) and checking that it could read them back. It would have detected the bad RAM chip but not the address line issue, because it doesn't test blocks of RAM, just single bytes. It would have tested 0x4000, found it working, 0x4001, found it working, and so on until the next 4KB bank, and then tested 0x5000 and found it working too. It would have to test RAM in chunks larger than 4KB, or be smart enough to have a separate test to clear RAM, then write to certain areas and then check specifically for address line issues by looking for the patterns it writes to repeat multiple times or something.
I'm sure that was a lot of work but it was intriguing to watch. Glad you got it to work in the end. Cheers.
The camera microphone sounds fine man, dont sweat it! Great video as always!
Great vid Adrian. I enjoyed the process of trying to troubleshoot without the schematics. Well done.
Excellent video, you really explained your thinking in the faultfinding!
Still asking myself, who downvotes such great videos! Please keep doing this stuff, Adrian! :) Always great to watch that!
Another great vid by Adrian.
Excellent video and troubleshooting!
Congrats on the working keyboard!
Thanks for walking us through your mistakes and problems and not editing straight through to the success.
you're a clever guy Adrian I wouldn't know where to start
Congrats on doing an excellent repair job, Adrian! 😁
Excellent Job.... that was crazy that the issue turned out to be the socket..
Great detective work on the RAM.
Great job troubleshooting!
Really interesting viedo Adrian. I loved how you were able to get it running as much to start the machine code monitor and debug the memory issues like that. Very interesting and clever to work out both the problem and solution. I learnt a lot from it.
Wow! You are a master troubleshooter!
Excellent video. I really enjoyed following your process. The memory mirroring had me thinking multiplexer/MMU.
Very good troubleshooting video!
Nice job of figuring that one out!
Thank you for another superb video!
Adrian eats 8-bit guy for lunch again! Thanks for this video. I had a clone Apple][+ and watching this video brought back nice memories!
Good work, Adrian!
Very nice debug and repair video! Thank you :D
Another great video Adrian!!
Great video Adrian.
Lots of work with that keyboard. Thanks for the video:)
Great fault finding Adrian!!
Was thinking chip select all along. Thanks Ben Eater for empowerment. If you haven't watched his videos, do it!
Great repair
Yes! new ADB video! grabs popcorn and a cold beer.
🍻
Proof that mouse p**s messes with your memory! Always enjoy watching the diagnostic process unfolding until success is achieved.
Excellent repair - really enjoyed that one =D
I noticed @8:38 it looked like the chip you inserted for the 7th bit had a pin sticking out, so maybe that was foreshadowing of the bent pin issues with some of those other chips later on.
Anyway, good job troubleshooting the root cause. That was a real head scratcher!
Great perseverance.
Hey Adrian, really like your troubleshooting and repair videos, In the UK we pretty much only had Commmodore, Amstrad, Spectrums and BBC Micros, I dont remember Apple II being a thing over here, I never knew anyone who had one, never even heard of these clone machines, your fixes are like little detective stories.
Thanks! Yeah I know Apple was there but in such limited quantity. I think it was mainly because without a special add in board, you only had a monochrome computer. Plus, they were definitely more expensive than machines like the C64 and of course the Spectrum. The BBC Micro wouldn't have been as big if it weren't for the school tie-in (in my opinion) and that is probably one reason the Apple II was big over in the US and Canada. Apple made deals with schools to feature them there. Most schools only had Apple IIs for a very long time ..... so kids used the computer there and asked their parents to get one at home. Good tactic and it worked.
LOL... my first computer! Look at the size of the power supply. 5:08 It had upper and lower case keys when the Apple only had lower case so you could type properly. If you need parts give Tom Morey, inventor of the boggie board a call as he ended up with it in trade for his Eagle ultralight. Probably worth quite a bit to a collector now. Amazing how fast computer technology advanced.
Work well done.
I'm not easily impressed I think but dude.. I'm impressed about the debuging process here.
great video Adrian
That is some epic deduction; inspiring all round. Thanks :-)
damn dude super well done there.
Well done .i found this very interesting
It's probably too late to suggest this, but the best thing I've found to clean corroded chip pins is a sand (or ink) eraser. It does an excellent job without being too harsh. Much better than any other solution I've tried.
I purchased a Franklin 1000 in 1984. Wish I had held on to it.
28:07 The 74LS138 are address decoders. The one you pulled out decodes the I/O at $C000 - $C0FF into keyboard read $C000, keyboard strobe $C010,, cassette toggle $C020, speaker toggle $C030 (A read from this clicks the speaker) etc etc. The one beside it decodes for the address space $C000-$FFFF which includes the I/O and ROMs. Apple memory map is simply $0000-$BFFF - RAM ; $C000-$C0FF internal and slot I/O, $C100-$CFFF, I/O slot ROM; $D000-$FFFF ROM. from Apple II REFERENCE MANUAL.
Adrian, this was a hell of a video. ,,🥇🥇🥇
It was like watching the first episode of 'Halt and Catch Fire' where they reverse engineer the IBM BIOS (well almost)
Nice sleuthing on your memory problem. Fun video!
That was a joy to watch :)
My popcorn didn't last so I hadda pause for an intermission....
.
...Riveting! Just riveting!...
That little Rode mic does a great job Adrian.
I am EXTREMELY happy with that thing. I only wish the battery life were longer ----- it's not short but I might be shooting for so many hours and may not notice when the battery totally dies.
I’ve seen a couple of videos about the replacement foam pads and it seems important to make sure no grease from you fingers isn't left on the foil side that could in time from not working.
Yeah next time I'm going to wear gloves. Luckily I have replacement pads still so if any fail I will know where to look :-)
Great reverse engineering work! NICE!
That filter board it is fine to leave the common mode choke in place, it will still filter out the FRI the power supply makes, keeping your house wiring from radiating it out. Best to replace those capacitors though, and for the class Y ones use ceramic versions, they will last a lot longer in use. A MOV in place of the one class X will also help to keep spikes from killing the switching supply, though it is best to place them after the fuse, so that the MOV failing because it has clamped enough spikes will not cause it to catch on fire.
Great watched a lot of videos first time commenting though I saw your channel on lgr👍😎📼
📼enjoyed this video
17:58 Adrian, when any mechanical keyboard types multiple characters from a single key stroke, that indicates your switches need oiling. I oil my keyboard switches with 3 in 1 silicone synthetic lubricant. I do it by pressing the key switch in all the way and dropping 2 drops in. Then you press the key 30 or 40 times and it will stop double typing.
I'm sure you probably know this but its how I fix old razer and gaming mouses that have the dreaded double click when only single clicking problem. Or sometimes the click doesn't work. I just oiled an HP gaming mouse from 2009 that had Omron switches. Cleaned the optical laser and oiled the switches and its like a brand new mouse.
Probably not a great idea for these capacitive keyswitches.
I was thinking as soon as I saw the mirroring that it had to be a multiplexer / Bus driver-trancever type issue, but I would have never chased it down back to those two address lines. Incredible trouble shooting.
...and the only reason I would think that is from watching your other videos - especially the Tandy 1000 EX video where you built your own memory expander. If there's a problem with how the memory is being managed, see what's interceding between it and the processor chips!
Most excellent! :)
Mice are no joke when it comes to destroying mechanical stuff. Junkyard Digs and Thunderhead289 did a rescue on an old Ford farm truck, and one of the problems was that the clutch pack was absolutely JAMMED with mouse nesting. Now, the throwout bearing was bad, but so many mice had gotten up into the clutch that even if the bearing had been perfect, it wouldn't have budged until it was cleaned out. Another problem with mouse nests is that the little mice like to make sure everything is nice and comfortable, which means lots of soft, absorbent, fibrous material. Cardboard, paper, straw, grass, their own fur, etc. All stuff that can absorb and hold on to moisture. So whether it's exposed auto parts, or a computer that they've gotten into, they basically create a sponge that will hold dampness against any surface it's on.
Yep, they destroyed a Laserjet 4 I used to own... very sad about that.
@@truckerallikatuk Ohhh nooooo...HPLJ4's are such amazing printers :( Sorry for your loss.
Very nice! IMHO, no issues with the camera's built-in microphone, while it doesn't sound as good as the wireless, it's fine. :)
How many centuries hence will those little foam pads be found around the basement?
Wow! Impressive Adrian! Damn mouse piss....but you killed it. I wanna be like you one day👍
The built in mic isn't terrible. I think the audio is very serviceable.
ah man so many tech issues today lol
good show
A troubleshooting god!
well done. your characteristic persistence paid off, yet again. a few thots on the corrosion you dealt w/. most often, you seem to deal w/ mobo & component corrosion from those leaking varta [or similar] nicd batts. i believe that's a basic/alkaline corrosion. that's why vinegar, a dilute acid, works to neutralize & clean. i believe urine is acidic, so its acidic corrosion would benefit from a cleaning w/ a base. maybe scrub w/ damp/mushy paste of baking soda & water. both basic and slightly abrasive. maybe w/ a toothbrush ? for that minty-fresh mobo smell, i think toothpaste is a mild base, also. thank you for sharing & teaching us. take care & stay safe.
Yeah perhaps. When I cleaned up the board -- I just scrubbed it under soap and water, so it should have washed away any of the leftover urine anyway. But indeed, a soaking in a mild basic solution might have been good too.
David at The 8Bit Guy had a short story with these foam keyboards, he tried to make replacement pads for himself, he was very creative but he ended up buying those replacement too.
I had watched his videos so didn't bother making my own and went right to buying them! What a huge hassle and these replacements were not cheap but worked flawlessly!
@@adriansdigitalbasement I made my comment seconds before you mentioned David, but I decided not to remove or change as there's still interesting info for other viewers about trying to make replacements by yourself :)
Hahah. I’ve been to Hump! You are definitely in PDX. ;)
I've had good luck using "Tarn-X Tarnish Remover" to clean up IC pins that have have become black with tarnish. I poor enough into a bowl to just cover the pins and sit the IC in the solution. I've had to use a soft tooth brush a few times but the result has been new looking pins.
Neat tip! I'll have to pick some of that up. Is that normally used to remove tarnish from silver?
sweet so glad it was a simple fix, but sometimes it takes time to get to that point lol
Some banks being 00 and other FF in DRAMs is normal. I think it's just that some cells were easier to connect "inverted" when they designed the chip layout. Somewhere far in the back of my head is something about having read that doing it that way saves some of the drivers for the actual memory array, but I can't recall details right now.
It doesn't matter in normal use, since the value gets inverted while writing AND while reading, which cancels itself out. But you can see it on discharged/"empty" cells after a cold boot.
You probably would have benefited by watching Tech Tangents aka Akbukuku aka Shelby, like you he also does alot of fault finding and restoration videos, love it Adrian 👍
I was yelling at the screen "Check the MUX!" was happy when he finally figured that out.
brilliant