A Mac Classic accelerator, some chips as old as me and some Sharpie paint pens
ฝัง
- เผยแพร่เมื่อ 4 ก.ค. 2024
- Welcome to Mid-Week-Mini-Mail-Call #39! This week we have a random assortment of awesome things.
0:00 Intro
1:34 Gemini Classic 68030 accelerator for the Macintosh Classic
20:32 Plastic alignment tools and assorted old ICs
28:58 Sharpie Paint Pens
34:44 Outro
Gemini Classic by Total Systems
Killy Clip
-- 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/
--- Instructional videos
My video on damage-free chip removal:
• How to remove chips wi...
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino - วิทยาศาสตร์และเทคโนโลยี
Please, Adrian, do not apologise for not producing two videos per week. Your fan club is quite loyal.
We definitely prefer a non-burnt-out Adrian to 2 videos every week. Looking forward to any video schedule you manage.
Thanks for all the wonderful info-packed shows you do.
Definitely.
And we also have Noel and Ben and...
Agreed 100% i'd rather have 1 video a week, instead of him end up burned out, and then no videos at all.
1 Video with a happy Mr. Black are far better then two with a non happy one . Please dont push it too hard.
I realize it is kind of off topic but do anybody know a good site to stream new movies online ?
Glad you enjoyed the Sharpie Paint Pens! I'm the guilty party who amazon drop-shipped them to you as a better alternative to marking chips with plain old Sharpies. I do find that even after stored for awhile, they start writing again fairly quickly, maybe with one or two depressions of the tip. :) I'm a fan of them. The red and black are extra-useful for marking polarity on various things. ENJOY! (and no worries about one versus two videos - it's your channel, do what makes you happy!)
They tend to work more quickly if you store them tip-down too! Nice gift!
Wow that accelerator is gorgeous
It could be the foundation of a “Blessed Mac” series. 😁👍
Will it fit the cursed Mac??? 😝
Action Retro yeah sure does! Has yours arrived yet from Germany? ;)
@@ToTheGAMES It has!! And it's a doozy lol
Do what you can when you want. You're not beholden to anyone for videos. Always remember to have fun and make backup copies of any footage you record. 😉
Those ICs you got are very useful for repairing classic arcade game boards!
Really? Arcade games use those? I had no idea, they had just been in my drawer of odds and ends components for something like the last 10 years and they were probably in the last guys collection as long as that. I just figured logic chips, right up Adrian's alley.
What’s hiding under the 70s towel? Keeping a future video topic under wraps? 😀
why is your username all fancy like that? : )
Future content yes :-)
There actually are PLCC sockets with staggered pins. They were notoriously used by Atari in the ST. They're hard to find, though. But for sure it would be easier than getting a Killy PLCC clip.
For Atari parts check best-electronics-ca.com/ if a similar socket was used in Ataris there is a good chance its there
You, Tech Tangents, and Perifractic are all so close to 100k!
perifractic is a joke
@@Walczyk why? I like them. Can you not handle the puns? :)
@@ToTheGAMES his commander x16 design looked like an xbox 360 rip off and he has no skills with a soldering iron
@@Walczyk It doesn't look too much like a 360 to me besides the fact it's smallish and white. Also you don't need skills with an iron to be knowledgable/entertaining, LGR for example I'm pretty sure has absolutely 0 skills with an iron, but I still enjoy his channel.
@@tombarber8929i absolutely love lgr, i really am irrational with my disilike for perifractic i think. i have this suspicion that he didn't actually design the commander x16 case, he had someone do it for him. it's bizarrely generic and has zero retro appeal.
Don't apologize! Just keep making great content 👍
Don't worry about the schedule Adrian. Take care of yourself first and then the channel.
'The Crazy Ham", Scott, was generous to me too, several years ago when I drove to Minnesota to buy a pile of old Motorola police radios from him (way too heavy to ship) and wound up with the truck bed full of treasure. His basement was like so many of ours, full to the brim and then some with old bits and pieces. It's hard to discard something that is still working or capable of working with just a little effort! It's always gives a satisfying feeling when one can give some of it away to a good home.
You are welcome for the goodies Adrian, i figured the adjustment tools and chips would be something you could use! I totally forgot that my return address was from my business account, surprised me when you said CrazyHamSales on the video... LOL
I thought it was a way for you to advertise some :)
@@ToTheGAMES It honestly wasn't my intent, when i logged into USPS to create the label its just a force of habit to click the login for my business instead of my personal login, and i stick so many labels on boxes and packages every day it wouldn't stand out to me on the return address being different then i thought it should be. Either way glad he got it, couldn't stand to toss that stuff out when i knew someone could use it.
@@CrazyHamSales No worries ^^
Hey Adrian, the Atari ST line uses the staggered plcc sockets for therir cpus, mmus, glues and blitters. On some forums they call these funky sockets.
www.exxoshost.co.uk/atari/last/blitter/index.htm
Here you can get the Adapter, I'm just now having my Atari-ST motherboard here in front of me with exactly the same socket 😁
Adapters are still available.
Even if you went back to only doing sporadic light bulb teardown, I'd be tuning in each time. Thanks for the awesome content Adrian!
* You could make a PCB to adapt one pin layout to the one you need.
* Resistor could be the bleed resistor for the high voltage DC capacitor for instance
I like the idea, I think a custom PCB could work.
ExxosUK has developed one for the Atari ST that used a similar "odd" pinout. Documented here as the "Funky PLCC 68 adapter". www.exxoshost.co.uk/atari/last/blitter/index.htm
He even sells them, and I believe you'd be able to use it directly. the 68000 is a 68pin PLCC according to Wikipedia.
That 68030 probably was underclocked due to cooling issues. Space may be a big issue with a PCB?
Jou could create a small sandwich board with KiCad and let it make bij JLBPCB or PCBWay.
I was thinking of suggesting that as well, the original pin sockets on the accelerator card are probably trashed anyway, why not remove them and fit an adapter pcb in the space where the old sockets were.
@@pANZERNOOb The problem is, how is he to know what the pinout would be? Given the Killy clip has offset pins it's not obvious which pin on it connects to which pin on the 68000 CPU.
@@d2factotum Fair enough, though I'm sure that someone can look at the PCB layout for the accelerator and work out what pins go where, you don't even really need to work out all of them if you can figure out the basic ones like power, clock, and reset so that you know exactly how the pins are offset for the rest of the connector.
@@d2factotum When they're staggered like that, there's only really one sensible way for them to connect to the single row on the chip. I'd be more concerned with the "evenly lined up" new socket's pinout, but these are standard so should be very easy to find pinouts. Failing that, if you have one in hand you can buzz it out.
Very quickly becoming my favourite and most anticipated content on all of TH-cam! Weekly, fortnightly, bi-weekly, monthly, whatever works for you works for me!
All your vid's are true gems for the retro community Adrian ... quantity doesn't matter!
Back in my college days late 70’s I built a digital roulette wheel with a 7490, 555 and a 74154 driving red led’s. I don’t have any docs but it was one of my first circuit designs! So hearing you have some jogged my memory!
I have used those plastic adjustment tools for adjusting the coils in diplex filters many years ago. The allen key fits into the ferrite core.
They are great because they don't give any interference and they don't damage the fragile cores. Awesome channel!
I'd suggest beeping out the pins and making an adapter from PLCC to the adapter board.
probably could solder paper clips to the adapters he has in order to make it reach the pins, could even solder it in place of the header so the mac board's unchanged.
Hobby shouldn't became full-time torture! Keep you sanity ;)
The 54xx series of chips are the industrial version of the 74xx logic chips, meaning they can stand up to more extreme environments than the standard chips. They are pin for pin compatible. There are three temperature ranges for ICs: -55 to 125 C, -40 to 85C, and 0 to 70C. Aerospace, industrial, and commercial respectively. Oh, and that blue DIP is a resistor pack.
Always happy to wait a little longer for my ADB fix, Mr. Black.
Perhaps skipping a week on the mini mail call videos, so you have them done by saturday but release on wednesday might work better for your schedule?
In any case, Keep on keeping on!
Hey Adrian, sorry to hear you couldn’t get the accelerator hooked up but I’m glad you had a good time checking it out anyway! I feel a little better about not being able to get the Killy clip off my board knowing that it’s probably glued down... but if anyone has any ideas on how to release it I can give it another try! Also interesting to know that it might not have been connected to power correctly. I just assumed it was right since it came that way in the Classic, but who knows. Maybe it’ll spring back to life once it gets some proper power!
Adrian, your videos are so good and you are such a genuine person that getting a video of yours, no matter how long it takes, is a gift, in my eyes. I am appreciative of all of the efforts you put forth and I am quite content to wait for your high quality videos, whenever they get released. Thank you Adrian for your videos, as always. We love you! Fred
the mail unboxing videos are awesome
35:01 I just dip the tip on solvent when I’m gonna use it again. I always have paint solvent nearby cause I have a model building hobby.
What?!? Do you have a day job? How do you manage to find time to record two videos per week? Thats insane, I thought you were a full time TH-camr. I can barely find time to brush my teeth and I'm not even recording videos lol.
He only has 100K subs, he's still too small to reliably be a full time content creator.
@@shadowtheimpure 100k subs is still a lot of subs
@@AmericanTerminator A lot? Yes. Full time money? No.
This is one of my favorite TH-cam channels keep up the good work! I am looking forward to 100K subscribers.
Chips as old as you? We'd have to go back to tubes for me...
You have such a calming voice, love theese vidoes when Im stressed out. Thanks!
FWIW, the 68000 is in a Quad Flat Pack package (or QFP for short). The socket is indeed a PLCC. You might try looking for a debugging clip for a QFP. The ones I’ve seen have been kinda expensive, though.
Another possibility might be to make an adapter out of some custom PCBs with castellated edge pads, pin headers; and then relocate the QFP 68000 off the motherboard. It’ll require a bit of soldering finesse; though.
🤔
I dealt with some Mac accelerator boards in the late 90s (PPC era). They were expensive too. Companies often had budgetary tricks they could play, so they couldn't replace a machine, but could spend outrageous amounts upgrading it. On paper they saved money even if they didn't really save anything. That was what the dealer I got parts from told me.
I organize my fodder this way: I have some small drawers setups (I 3D printed some, but you can find that at dollar stores) with numbers on the drawers. Then I have an excel spreadsheet where I just put item / type / description (optional) / drawer number. Then I use a pivot table with the filter selected to _item_ or _type_ to locate the correct drawer(s) when I need an item. This way I don’t need to create categorized drawers. They are just a mess, but I have what’s inside in the spreadsheet.
I bet you backup that spreadsheet pretty often. ;D
Adrian we had two of these type of cards, I can’t remember the brand but we had one in a Mac SE (not se/30) and in a Mac Plus. Made a big difference in getting stuff done until a couple of years later when we went to the LC III and Quadra 605 in the office. Then after that we went Power Computing and Radius 81/110 which I still have, last I knew it worked when I fired it up about 4 years ago. Love watching stuff that I use to work with all the time. When we got the first card for the Mac Plus 128 I had to go to sears to get a long torx bit screwdriver just so we could open the case.
Thanks for your time and hard work, so it's definite have enough time for rest.
Nice to get my old Mac fix, never had one but a friend had a Mac Classic when they first came to the UK. remember it well. would love to get one.
Yes! Been waiting for this. Bored as heck at work!
Super excited to watch!
I'm not sure what the SC414075 code breaks down to but I believe the S in SC denotes a "step" and the 414075 is the 50MHz capable mask set for the 68030. Wild speculation would say these parts may be engineering samples and exist as the stage prior to full production prototypes. Back in those days, faster 68K chips and 56K DSPs were a very hot commodity and lots of pre-production parts made it into low volume products. The XC stands for production prototype and when chips were being introduced for volume production, all the sample chips they sent me came with XC or XSP part numbers. I worked with a lot of Motorola DSPs and 68K chips back then and I recall seeing only a couple SC parts, and only on high end 68K accelerators.
Thanks again for the video! And real life takes always priority, so don’t stress yourself out over getting two videos out a week. Good things are always worth the wait.
Don't worry about the video scheduling, Adrian. We enjoy the content and what's most important is that you're not burnt out or not enjoying it.
716 Is my hometown, Buffalo, NY!!! And I totally understand about sometimes not being able to do two videos a week. For one I appreciate anything you're willing to share of your knowledge, and secondly, a man's gotta eat!
The 54 series is the military equivalent of the 74 series. They are usually still manufactured/available with long term sourcing guarantees, cost a small fortune for what they are, and are still frequently used in new military designs.
I bet CPU Galaxy knows what to do with that expansion board!
That channel is gonna be huge soon too.
@@DanPellegrino486 yeah, his collection is insane. Really like his knowledge too. Well studied guy.
Cool St John's bridge shirt, Adrian!
This vid had 9k views in under 8 hours! I love your work Adrian, your style and your humour. Makes me think of school 35yrs ago with Apple IIe's (and playing Pooyan in colour). Wishing you the 100k nudge over 😃
I remember one computer store we'd frequent had a Mac Plus beside a Mac Plus with a Gemini accelerator. It definitely made us drool a bit. :D
I remember that there's some easy to use OCR tooling out there. If you have any development or shell scripting experience and you can come up with a way to systematically photograph your ICs, it should be pretty quick to build a DB of all your chips.
Thanks for your efforts man!
For that PLCC slot, you should desolder the broken clips; find a PLCC socket with longer leads (so they make a wire wrap socket?) and line them up and solder them.
Don't feel old I remember the vacuum tube days with the tube testers
Looking at the Killy adapter, probably you can design a PCB with through-holes that fit the other adapter you bought plus holes for the staggered row. One set of pins will be pass-through, the others you solder in and clip off. The clipped-off ones are connected with a trace to the staggered rows into which you solder pins prior to adding the plastic adapter. Depending on how thick your PCB is and how small you make the solder joints, this could be as thin as 2-3mm
If you could figure out the pinout on the card you could combine a surface mount plcc connector and a small custom pcb with pins for plugging into the card.
Man, your content is awesome! Keep healthy and you could alternate one mmmc and one regular episode once a week, or whatever you want, or can do. Just keep em' coming when you can. We will be here! Thank you for your fantastic work!
54 logic chips are the military extended temperature range versions of the 74 chips. They are largely compatible, although a very few do have slightly different pinouts!
Instead of paint pens, try using a grease pencil (aka china marker). You can get different colors, work well on plastic, and you don't have to shake them.
Mains voltage over a resistor makes perfect sense if that resistor is a bleeder resistor that is used to discharge the RF interference filter caps between live and neutral. The resistor will have a quite high value, typically 220kOhm or 470kOhm, but they are usually present to prevent you getting zapped from the filter caps after you unplugged the device with mains turned off.
thank you we still appreciate you!!
74 is comsumer chips 54 is military versions. They are each exact specs and each is tested. I have lots of chips too and use these cabinets with little drawers. Each on is labeled for easy finds. Hope this helps. Oh, also military chips work in lower and higher temperatures. For home computers they are more than fine but don't pay more for them:)
Those are called "TV Tweakers" in the Biz
keep up the great work Adrian 🕹 ♥
@Adrian's Digital Basement
Those Sharpie pens have another very useful characteristic: They can be used as a solder mask to cover up repaired traces as the paint is an insulator once dried. Have fun!
Don’t worry about fewer videos, I know all about time constraints as a college student.
For the chip issue I would recommend a bin wall like Voidstar Labs built a while back for storing his stuff, just maybe a bit less fancy. Label each with a part number, and put them in. That also means you don’t need a database of chips, which is a big time-saver.
If you do want to database them, I would happily try to make the system for you, so you could just enter the chips’ info and a quantity, and it would do the rest. We’ve got a similar system at our house for the groceries in the freezer(s).
Unfortunately I’m in Upstate NY, otherwise I would offer to stop by and help you sort through all of them.
I remember about 5 or 6 years ago I picked up two Apple ][ clones from e-Waste. They were bootlegs, home etched and on one circuit board the traces came off and when I turned on the power, I got magic smoke. So I swapped chips to find the bad one, then I rode my bike to the local electronic company (RIP btw...) and got a replacement 7402 (or 01?) and they sold me one from 1972. NOS. Here I am, buying a replacement IC that's still in production for a computer built in 1980 and I got a chip that was old when the computer was made. Works fine though :-)
I found an obscure Japanese blog by searching on "Killy clip" github. The guy was gutted to discover, after soldering a Gemini 2 to a Mac to obtain a good connection - the simm sockets were too loose to provide any kind of stable operation. Killy clips seem to have been designed as one shot items. Good luck on hackng it to fit.
Our techs used plastic boxes with small drawers and put a label on the drawer front, The Dip chips were stored in numerical order above the bench. System also works in bookcases or storage cabinetsm where for a storage cabinet the door would have a sign for rangge of chip numbers enclosed.
Awesome stuff on the mini mail call! I hope(as all of us do) you get the special Killy Socket you need to get that Mac accelerator card working again. That would be a awesome video on how much more performance you get out of that Mac classic. The Sharpie Red paint pens are also a nice addition indeeed for your IC Chips indeed.
On your accelerator board, what you need is an interposer, but with the limited height available it gets more interesting. The basic idea is a PCB that connects to both the existing CPU (likely via the PLCC socket you bought) and the accelerator board at the Killy clip receptacle location. The PCB will perform the mapping of all the signals between the two. Given the available space, you may need to remove the Killy clip receptacle from the accelerator board and install 'zero height' socket pins in its place. The two hurdles will be 1) figuring out the mapping; and 2) dealing with the inevitable co-location problem of pins on both sides needing to use the same hole location. You might be able to use ribbon cables to move the interposer out from between the two boards, making it more physically possible, but the signal quality would likely suffer significantly. I hope this is possible and that you have the time to give it a try. Good luck!
You can store and organize ICs by pressing them into sheets of styrofoam and use the pens/markers to write on sheets.
Hmm, nice pile of old chips... maybe some parts to build an Apple Computer 1? Love the videos, keep it up, don't worry if you can only post one video per week, your efforts are greatly appreciated.
You could 3D print an adapter with channels for pins and wires to connect the killy socket to the standard PLCC socket. It would be annoying to draw all the wires through but it would work.
Do look after yourself old chap.
On the subject of an adaptor for that accelerator I guess you have three options:
Easy - Find the correct PLCC socket - yeh, right! I'm sorry to say those clips are almost certainly proprietary and so are rare as unicorn poo.
Proper - Design an adaptor PCB to interface a SMT (for clearance) socket to some turn-pin headers to fit the board - accelerator pin-out?
Bodge - Remove the CPU adaptor headers from the accelerator board. Solder some single core wires to the shoulders of the main board CPU - very fiddly! A little hot glue at that point to support the wires and prevent shorts is a good idea! Place accelerator over the main board and wrangle the ends of the wires through the holes left from removing the headers and solder in place...
...the last option is likely the one I'd go for as I'm often too impatient to wait on PCB's unless I really have to make one. Obviously not for the faint of heart and you'll have a devil of a job diagnosing any issues. It would be easier to remove the motherboard CPU first but I'd advise against that as a lot of these accelerators don't just 'replace' the motherboard CPU, it's more a case of initially booting off the motherboard CPU and handing off to the accelerator.
The extra video will be missed, but my life will be going more back to "normal" anyway, so I won't be home watching youtube nearly as much anyway. Thanks for all your hard work!
Hello Adrian, I appreciate every single video. Thank's a lot. Regarding non fitting CPU socket: It may fit an MMU / Glue Socket from the Atari ST line - these has as I remember similar / same pinout shape.
Greetings from New York, Adrian!
I wonder if storing the paint pens tip down would help?
You are right: 54-series logic chips are identical to 74-series logic chip, but specified for the extended military temperature range (-55°C - 125°C / -67°F - 257°F) instead of the commercial temperature range (0°C - 70°C / 32°F - 158°F). Some data sheets list the 54-type chips as less powerfull (less output current) than the 74-type chips, but I suspect that inside the narrow commercial temperature range, 54-type chips are able to deliver the same power as 74-type chips, you just have to derate them at high or need to consider higher impedance at extremely low termperature.
The silver and gold metallic Sharpies work great on ICs and the markings are highly visible. Also, ferrite core chokes and transformers are adjusted with plastic tools to not affect the tune while adjusting, not because of a shock hazard.
Completely understand being busy! I'll miss the mid-week video for sure, but I completely understand :-)
I organize my chips by using three or four "small parts" bins like you get for keeping screws and whatnot organized in a garage. Leave the family out of the part number, so 74LS04 becomes 74*04. Then just put all the different families together in one bin. A lot of times you can use them interchangeably anyway (LS and HCT for example are mostly compatible), and if you try to divide them by family it uses way too many boxes too quickly.
Yay! Another MMM Mail Call. I may have put an extra M in there for some reason. Always enjoy your videos!
I would say it would not be to hard to use a service like PCBway to make a new board using the current PLCC sockets and adapt to the old Killy pinout. If I remember it right the pins were stagered so that when it was on the chip you could know easily which pin you were connected to for diagnostics. If I had a layout of the Killy connections on the PCB I could make an adapter for your purposes. The only issue is that my work makes it hard for me to sit down long enough to do it. Sometimes out till 10PM before I get home. Great vids Adrian, keep up the good work.
I had no idea there were so many accelerator cards for compact Macs--specifically the Classic.
Don't sweat it my dude! I say focus on quality time with your loved ones and refill your energies. The content will be better and you will enjoy more your hobby! It is a slippery slope to be so passionate about something and end up with another work shift trying to fulfill arbitrary goals on things that were supposed to be a way to vent off frustration.
Love the shirt.
I’ve got some paint pens and they seem to work much better if stored tip side down. I keep them in an old jam jar to keep them oriented.
I think you can use surface mount pllc sockets and kind of freely bend the pins. Maybe a 3d printed backplate to secure the pins in position before you press on it.
Thank you for the tenacity to do two a week. I barely had enough to do one.
A tip, take time on the weekend to make a crapton of them, edit them up, upload videos as private and set them to release on a particular day. Try to get a queue going so when things get busy you don't have to worry as much.
You do great stuff and even when there is only a video from time to time it will be great. And for your inventory, we use partkeepr at work. It is open source and does its job. ;)
28:20 - Goes into the '100-Ohm' resistor drawer :)
Might sound silly, but I use Wine Glass Writers on my stuff. They're bright and are soft-tipped like regular sharpies. Can be scratched off, but takes some effort (or alcohol)
I had a Classic in 1990, and I was offered an accelerator for free. it simply increased the clock speed from 8 mhz to 16 mhz. The person that helped me install it broke something and I ended up paying $ 400 to fix it anyway. It worked, but it eventually became unstable.
You could get sockets with diagnonal alignment of the pins there! I had a problem trying to find one of those for an Atari ST Blitter years ago, still got one spare - checked it now and yes it has diagonal pin alignment. But the Blitter has a different pin count to what you need I think. You could make a small adapter PCB too. Regards the damaged socket there - they look like something I just did on a video going up soon, cut a DIP socket into 2 strips (ie. remove the bars from inbetween the two sides, take those 2 strips and use them to replace the 2 strips on each side of existing connectors.
Do you recall what brand the socket is? I was looking at Digikey and there seemed no quick way to figure out which are using the normal pinout and which are diagonal.
@@adriansdigitalbasement I am not sure they are still manufactured! Exxos (he has a forum of the same name) created an adapter for use with the one in the ST for that reason. I had a quick look on eBay but they all seem to be the standard alignment, as you had found. So I think unless someone out there (maybe one of your viewers may have one yet?!??) I guess the only option would be to design an adapter PCB =/
The reason you have to press on the tip of the oil pen is to even out the pressure difference between the inside of the pen and the outside air. If not, too much paint could stream out when you try to write with it.
A resistor across the AC line is pretty common, they're used to discharge X/Y rated EMI suppression caps. You can get a case of the tingles if you touch the blade after unplugging stuff otherwise!
For testing purposes, you could just wire a ribbon cable from that chip socket to the pinslots for that killi clip (assuming the pinmapping is discoverable) and set the accelerator card to the side instead of piggybacked. Assuming I didn't miss any alignment reliant connections aside from the unneeded floppy passthrough
Great video, as always, Adrian! Regarding the accelerator card, you could remove the broken "receptacle", use the socket you got off of eBay, bend the pins and make them longer if necessary to finally solder the socket directly in place. I'm just not sure if it would mechanically fit, height wise. Another option would be to get new, socket compatible, receptacles and bend the pins to align with your socket. I would go with that option. Anyway you go at it, I hope you find a solution and make a video about it!
If you can adapt to the headers on the card, just get an adaptor PCB made. If you can't, maybe remove the headers and make an adaptor, or remote mount the card with wires.
Paint pens are always a pain, but Sharpie metallic colours, ie, silver gold, work like a normal Sharpie.