0039 What is a MOS 6582 SID?, 40 column text on a stock VIC-20 and glorious 8" floppy disks

[@8_Bit]

Thanks for the shout-out! Yeah, BASIC 4.0 improves on BASIC 2.0 with a bunch of disk commands, and also greatly improved garbage collection (automatic memory management).

[@muttBunch]

That whole binder is immaculate. Beautifully preserved

[@SkyCharger001]

I've been told that the 6582 was the first step towards getting the SID to match its original design specs (which the 6581 was notorious for not doing), which eventually lead to the 8580

[@TzOk]

TRS-80 disk drives use synchronous AC motors to spin the disks, so the disk RPMs will be lower in 50Hz countries, than in 60Hz countries.

[@camelid]

Had the same setup in a xerox 820-II computer system with an 8” floppy, thought it was odd seeing a synchronous AC motor but it does make for a stable clock signal.

[@retrozmachine1189]

Whilst it is true that the 8" disk drives used AC motors disk drives intended for 50Hz markets were adjusted to spin the disks at the same RPM as their 60Hz cousins. This could be done by changing the pulley on the motor or the hub. Some motor spindles had two belt positions, one for 50, one for 60. Other drives had arrangements of capacitors to nudge the motor speed around. The 50Hz program was more about interrupt handling IIRC. The 50hertz program could be found on disks for MIII software too. Even though the MIII/IV and II/16 had internal CRTs and therefore didn't care what the mains frequency was there was a jumper in the machine to select the frame rate for the country the system was used in. This in turn changed the interrupt rate which would throw the cursor blink speed and other things out of whack. I'm not sure if there was a jumper in the II/16 TBH since it used a 6845 CRTC but it wouldn't surprise me to find one if I dug out the technical manual and had a read. Since it used a 6845 it's also possible that the 50hz program for the MII was actually ensuring the 6845 registers remained set up for a 50hz display but I suspect this was not the case.

[@evensgrey]

That's not a TRS-80 feature, but an 8 inch floppy drive feature.

[@jammi__]

6582 is a 9V chip like the 8580, and a drop-in replacement. It's somewhat earlier and still has the volume register bug used as a "feature" for early sampled sound playback. It sounds basically the same as 8580.

[@mirabilis]

I think I saw a decapped 6582 somewhere. The silicon said 8580.

[@Gubelat]

@@mirabilis its only a 8580 labeled as 6582. 6582 were sold as sparparts only.

[@winstonsmith478]

A tip for people who want to store or mail ICs and don't have conductive foam - wrap the foam you'll be using to protect the pins with aluminum foil and pierce the IC pins through it and into the foam. Also, cellophane tape creates and holds a huge amount of static electricity charge when pulled from its roll. That will dissipate over time, faster as the ambient humidity is raised, so if you must use it, pull it from the roll and tape just a small amount of the end of it on a desk or counter and let it sit a while before using it.

[@Breakfast_of_Champions]

Hey Adrian sending healing power to your shoulder right now! Make sure you get some sunshine vitamin D while the summer is on!

[@Agnarian]

I love your repair method. I have tried to watch other people repair some of the machines you do and i honestly can't get through a video. Their voice drives me crazy or they are haphazard in their methodology. You truly are one of my favorite vloggers. Truly tops in my book! Keep up the great work!

[@c128stuff]

6582 is a 8580 made for 3rd parties. Check the stereo sid recording on my channel for hearing one in action. The 6582 was sold to among others CMD, and before that Dr Evil Laboratories for use in the SID Symphony cartridge, but supposedly also to others.

[@Psychlist1972]

Frozen shoulder: I have that on my left side. I've been dumb though and haven't gotten the steroid shots yet, so a year later, it's still mostly frozen and painful (especially at night). Do get the shots and do the resistance exercises if you haven't already. Every so often, I turn it a bad way and it hurts like a SOB. My dr told me it will eventually free up over time even without exercises and shots, but it'll be years. Get the shots and do the exercises. :)

[@GrahamColeBiz]

Nathan's note on a punched card made me smile, and also feel very old.

[@cjripka6752]

MS Excel was developed by MS to replace Multiplan first on the Macintosh in 1985. Lotus had just released Lotus Jazz for the Macintosh, trying to leverage their dominance in the spread sheet market onto the Mac. It did not do well, MS was marketing Multiplan for the Mac at the time, and developed Excel as a response to Jazz. Excel would opened Lotus 123 files, which Multiplan could not. To help Lotus 123 PC users switch to the Mac with Excel, you could use the "/" commands with Excel. Excel today still has a Lotus compatibility setting in the Excel options, that allows the use of old Lotus "/" commands.

[@kaitlyn__L]

Huh, that actually makes the name Excel mean something

[@MartinSteed]

The VIC20 did have a multicolor mode, but it halved the resolution of the graphics - in the normal 8x8 cell instead of each bit determining if a pixel was active, each pair of pixels indexed a color, effectively turning it into a 4 color 4x8 character. The colors were limited, normally each character had a foreground and background color, so that was 2 of the 4 available colours, the other 2 were I think border and screen color.

[@biodek]

Hi Adrian, thanks for presenting this, always fun to watch someone going through the oldies. The original Model II Profile disk you showed first actually has Model II indicated on the far left graphic where the others show Model II in upper left of the label section and the graphic on the far left just has the standard TRS-80 indication.

[@hfiguiere]

9:45 Excel was developed as a Macintosh application. Multiplan was a text mode application (there was a Mac port though). That's how things started.

[@JenniferinIllinois]

Hello Adrian from an Illinois viewer. 😉 All that Radio Shack goodness! R.I.P. Radio Shack

[@parrottm76262]

That VIC cart and what you presented is fascinating. I learned a LOT about the VIC.

[@vcm8830]

Awesome video! Some of my favorite machines together . I’m really a big fan of the model ii derivatives 12/16b/6000 especially running Xenix. And the VIC 20 was a big part of my childhood computer experience. Now just image how cool that cartridge would be if all of the game slots were filled with Radar Rat Race, perfection! Keep up the great work :-)

[@Psychlist1972]

MSFT originally developed Excel for the Mac. Multiplan was CP/M and DOS and text mode. Eventually, to compete with Lotus 123 on PC, Microsoft created Excel for PC, using an early Windows GUI instead of just text. So the split between multiplan and excel was really a DOS/Windows thing. Plus, multiplan was mostly for CP/M and 8-bit machines. I learned (well, a little) multiplan in 6th or 7th grade on stand-alone DEC CP/M VT terminals in the computer lab in my middle school (they also had VIC-20s and, eventually, C64s in there which stole me away from the mono screens of the DEC machines). There was also Microsoft Works, which was purchased by Microsoft and made semi-compatible with Excel. I had Works for DOS back in the late 80s or very early 90s because it was much cheaper for an individual to buy vs Lotus 123 or Excel (which I recall were both quite expensive). It was nice because it used the 80x50 character display mode on my 286. I remember at my first real technical job in the early 90s, I converted folks in the company to Windows 3 from DOS. We initially used the Lotus products on Windows, but they were slow as dirt and still quite expensive. It's easy to forget how expensive desktop software used to be. Most everything was hundreds or sometimes thousands of dollars in 1980s-1990s dollars. Lotus 123 was, as I recall, the equivalent of like $1500 in today's dollars for a single seat. But Lotus 123 and Wordperfect were the two things everyone had to have on their PC before GUIs took over and those companies failed to transition properly.

[@cjr118]

From what I read, it seems the 6582 was used in the SID symphony card. I did find this on Wikipedia. "The consumer version of the 8580 was rebadged the 6582, even though the die on the chip is identical to a stock 8580 chip, including the '8580R5' mark. Dr. Evil Laboratories used it in their SID Symphony expansion cartridge (sold to Creative Micro Designs in 1991), and it was used in a few other places as well, including one PC sound-card."

[@adriansdigitalbasement2]

That's really quite cool -- and too bad it never had more widespread use!

[@DavePoo2]

A PC with a SID!

[@kaitlyn__L]

That explains why the date code is so late!

[@thedungeondelver]

I wanted a 40 column solution for the VIC back in the day but on my allowance as a kid I couldn't afford a RAM expansion or anything else to expand the VIC, to allow 40 columns. I had a tape drive, and some C= cartridges, and that was it!

[@leeselectronicwidgets]

The 40 column mode on the vic20 reminds me of the time I made a 64 column word processor on my Atari 800, using 5 pixel wide characters :-)

[@TonyWeirPD]

ha! I did exactly the same thing (although it was an 800XL). It's surprising what you could squeeze out of a 1.8MHz 6502.

[@timcross3461]

The game at 27:27 is Demon Attack on the Atari 2600. Pretty good implementation on the VIC-20!

[@klaushergesheimer8602]

Hi, Adrian, could you please put the disk at 6:50 on a scanner and scan it to a high res picture file? I also absolutely love that 70ies brown color scheme. Thank you!

[@michaeldibb]

The brown colour reminds me of the Nicotine brown wallpaper in my Dad's office. He used to smoke 60 cigarettes a day.

[@aaldrich1982]

I really like the 2nd channel. I'm sure that more editing work goes into the main channel but for me I like quick and dirty retro videos more. Regardless, thanks for another video. Take care!

[@ivanbm72]

My goodness, I remember Multiplan in my grandparents printshop. My grandma would turn on the computer, load the OS disk, then Multiplan disk, go for coffee, go get the mail, and still wait for the program to load

[@evensgrey]

I recall the Ahoy! report on the launch of the Amiga. When they demonstrated the Sidecar hardware (the IBM PC clone add-on that plugged in a side expansion port, unlike the internal cards for later big box Amigas) they explicitly mentioned that it's display was "Standard IBM vanilla" (white on black background) and it was so compatible that programs like Lotus 1-2-3 took just as long to load as on an IBM built machine. Of course, in 1985, genuine compatibility was still a bit of an open question.

[@kattphloxworthych]

Fun fact about 8" floppies: The notch on 8" floppies works the exact opposite way of how 5 1/4" floppies' do. If the notch is uncovered, the disk is write-PROTECTED. If there's something covering the notch, it's write-ENABLED. If it's not notched, it's permanently write-enabled instead of protected as are 5 1/4" diskettes.

[@tschak909]

The 6582 is another name for the 8580 high speed NMOS variant of the 6581 SID. It differs in the required supply voltage (+9v versus +12v) and the required capacitor. The sound output from the 8580/6582 is also different due to changes in the analog circuitry.

[@c128stuff]

The difference between a 8580 and 6582 is the first one being intended for use by Commodore, while the 6582 is the OEM version which was sold to 3rd parties. It was used for example in the CMD SID Symphony (version 3 of Dr Evil Laboratories SID Symphony). You can find some stereo SID recording on my channel making use of it. In sound it is identical to a 8580, and electrically it also is identical from all I can tell.

[@kaitlyn__L]

@@c128stuff I wonder why Commodore gave it a separate model number for that purpose to begin with

[@c128stuff]

@@kaitlyn__L good question, which I also had, but none of the former Commodore and CSG people I know could give a definite answer to so far. That said, it isn't very unusual for an.oem part to have a different number than the same part used directly by the manufacturor.

[@lasskinn474]

8 bit show and tell is a great channel

[@osgeld]

Demon Attack (the second game) is one of my favorites to play on Atari VCS, it gets really frantic

[@freeculture]

Intellivision was good, with boss ship etc. This port isn't bad for the machine considering how the other games look. Imagic was the Activision for Mattel, very cool games but not that many ports to other platforms.

[@edgeeffect]

When I was at college in the UK, we had a bunch of Intertec Superbrains... if we ran a US 60Hz version of CP/M, the screen would "wobble" but if we ran a 50Hz CP/M the screen was fine... this was probably just a single byte (or less) different in the BIOS... assuming TRSDOS is more or less similar to CP/M.... that's probably what the 50HZ program sets up.

[@MatthewHill]

United Adjustment Service is apparently a collections agency. Might be very interesting to find out what's on that disk.

[@billfruge25]

Wow I had something very much like that back in 1982...I used it a LOT when calling up BBS's and doing word processing. For assembly programming it became a must to have 40 columns. I had one of those bank-switchable 5 cartridge expansion boards so it worked well with ram expansion and HES-MON. :D

[@WinrichNaujoks]

I used the 40 colum VIC-20 back in the day. I had a bunch of programs that were modified coming from the PET, in BASIC, of course. I remember there was a game where you have to dig for gold in a mine, which was fun.

[@twocvbloke]

The 70s moustache look, seems everyone was rocking that back in the day... :P

[@disgruntledtoons]

I remember October 1984. I was in the Air Force, attending tech school at Lackland AFB. I bought my C-64 that month from Sears in Ingram Park Mall, San Antonio, Texas. Bought my first floppy drive from the K-Mart just off base that month or maybe the month after.

[@espressomatic]

It's probably fair for Radio Shack to use the word "small" when others used the word "mini" for computers that wouldn't fit easily in the back of a pick-up truck. :)

[@jammi__]

Excel was Microsoft's spreadsheet for Macintosh. They ported it later to Windows. Same regarding the Mac version of Word, which was ported to Windows later. The DOS version was a dead end.

[@ianchard]

I used something similar to the 40-column card called 'Super Screen'. I had it on tape, and it displayed white text on a blue background. The font was very similar to the card you showed here.

[@BG101UK]

30:00 That's Jupiter Lander if I'm not mistaken, the tune and display are about the same as the Commodore 64 version.. ... I did originally have that for the VIC but it was sold with the original machine back in the early 1980s to afford a C64; I'll have to get another one now I have a VIC again. (I do have it for the Commodore 64).

[@TheDiveO]

The 40 col mode is what some ZX Spectrum programs did as 64 col mode, such as word processors. At least with the always bitmapped graphics RAM in the ZX Spectrum, this was rather easy to achive by using 4x8 (3x7) characters instead of 8x8 (6x7). It was an eye strain in those TV out days.

[@granitepenguin]

I never had a VIC-20 back in the day; I started on the original CoCo and my friends had C64s. I recently got a VIC-20 in a lot and got it working and have been thinking of what to do with it; This would be a pretty cool project to play with.

[@tigheklory]

Maybe ask Bill Herd about that SID chip? Looking forward to a video on the Coleco Adam Computer.

[@espressomatic]

My VIC-20 carts from "back in the day:" Raid on Fort Knox (ya!), Serpentine, Gorf, Choplifter, The Count - one more I can't recall.

[@jrnovosel]

We've been trying to reach you about the extended service plan for your Model II.

[@bitdigital8052]

I have a SID Symphony Stereo Cartridge for the C64 that has a 6582 SID inside which also uses a 9v Battery to help power it.

[@douro20]

The timing might be a bit different on AC motor driven floppy disk drives which run on 50Hz. The Model 16 is a Unix workstation which could run regular Model II software using a Z80 coprocessor.

[@waynegoodwin3217]

Hey I noticed you changed the sprayer knob on the D5 Deoxit can to stop it from spraying bloody everywhere.

[@steffenjachnow8176]

CSG stands for "Commodore Semiconductor Group" formally known as MOS Technology, Inc.

[@TheGreatAtario]

Back in the day I used programs that pulled similar tricks to get an 80-column display on the Atari 8-bits. The resulting font looked pretty much identical to this. Not much leeway when you're limited to a 6×3 grid!

[@johnjoyce]

That label ink blurring seems to be caused by the plastics of the binder sleeve page. Might want to get them out of there.

[@josephkarl2061]

Profile for the TRS80 range (it came out on the Model I/III and IV) was database software that was a real gamechanger. For the first time, a home user or small business owner had access to software that up to that point was the domain of minicomputers or mainframes. As far as I'm concerned, its biggest flaws were the limitations of the hardware. A real game changer.

[@DerekWitt]

I remember using Multiplan on my TRS-80 Model III. Haven’t heard Multiplan in years.

[@sa3270]

I would guess they moved the write protect notch so you could see it when the disk is in the sleeve.

[@evileyeball]

The youtube algorythm flung Robin at me some years back and I heard him mention you in one of his videos which sent me over your way, I love both of your videos despite having never touched a commodor machine in my life (We started off with a Tandy 1000 SX) but I used to do a lot of fun stuff with various Basic/Qbasic back in the day on my old Tandy and later on my Pentium 75 (whch got upgraded to a P 90 later in its life when we went from Win 3.11 to Win 98. I miss that machine sometimes, Feeling like you would never be able to fill the 1.275gb hdd. Now I have a machine with 4TB inside and its Quite full. HAHAHA. Thanks for being you and thanks for everything you do. Also I have to find a source for Deoxit as I really need to clean the volume pot on my amp but at present I don't have any.

[@elfenmagix8173]

6582 as I remember was used on the a few Roland and Yamaha Synthesizers of the era, using 2, 4, 6 or 8 SID depending on how many voices the Synths had. The Synths did not have a 12v line in them but had a 9v and 5v lines.

[@andlabs]

Do you have any references? I just tried to find your information on Google and found absolutely nothing.

[@lnxrox]

Are you shure? To my knowledge there was no contamporary synth made with SIDs. The Sidstation came long after its hayday. A 6582 is a 8580 with another label. So a SID with a "cleaner" sound and less pronunced ressonance Filters. Usaly people like the Sound of the 6581 more.

[@Ed64]

@@lnxrox If you listen to LMAN’s music you’ll grow new found love for the 8580. Both SIDs are great

[@elmariachi5133]

You could play some digis on that 6582 and check if it can play these without the Digifix, compared to the 8580 :)

[@f15sim]

It's a write *enable* notch. 8" disks are write protected if there's nothing covering the notch. :)

[@agurdel]

25:00 The scrolling here has the slight advantage that is scrolls by two lines at once so the printing has to pause only every second line. Side note: Stepping through the video with , and . is good enough to watch the scrolling column by column from left to right.

[@fourthhorseman4531]

I would have gone nuts for that 40 column software on my VIC-20 back in the early 80s!

[@MajorMacca]

Gotta love how that Lunar/Jupiter Lander game nicked the start theme from Moon Cresta...

[@Agnemons]

The "Profile" disks are a Database program. The difference between the Model II and the 16B is, in simple terms, that the 16B has a Motorola 68000 processor board installed (among others) it use's a Z80 to handle all the I/O so the 16B running TRSDOS just ignores the 68K side of things. The model 12 is, as far as I'm aware just an updated version of the Model II.

[@retroandgaming]

Searched through a lot of computer magazines and I mostly just find chip price listings that mention this one. It looks like it was cheaper. The 6581 (12V) is listed at 14.95 whereas the 6582 (9V) is listed at 14.05 but discounted till 9.95. (Byte Magazine nr. 06 - 1988 page 384). There is an article in Ahoy (March 1984) that details the anatomy of the commodore 64 (pages 21 to 25) but it just states that it uses the 6582 SID chip (page 24).

[@K-o-R]

25:00 Notice how it scrolls up by two lines at a time, but then draws the new lines at the bottom one at a time.

[@P5ychoFox]

Oh they’re 8” disks. For a while there I thought you had tiny hands :)

[@VectrexForever]

I did run 40 column mode on my VIC back in the day, IIRC that was also code from a magazine. I didn't actually use it to program anything with. The Super Expander uses the same graphics mode that is used to display the 40 column mode. You can turn the helicopter in Choplifter by keeping fire pressed while turning. Graphics on the VIC work the same as on the C64 (except it doesn't have sprites), two colors per 8x8 pixel blok, or four in multi-color mode, at half-horizontal resolution, where one color is selected using a global 'aux' color and another is the same as the border color.

[@mal2ksc]

The font used for 40 column mode looks a lot like the font used in a PC game, Starflight. It used 160x200x16 color mode if I remember correctly, and had characters with 3x5 cells to get considerably more than 25 lines. It looks like the "VIC-40" stayed with 7 scan lines per character, but uses a similar method of simplifying letters so they're still identifiable at a mere 3 pixels wide.

[@granitepenguin]

You're right; it totally does! I was trying to think why it looked familiar. I lost many, many hours to Starflight (and Starflight 2). It's still one of my favorite games. It's amazing how much gameplay you can cram onto a single floppy. I recently found it on GOG and started playing it again (and still have the floppies).

[@WalterGreenIII]

could it be that 8 inch disks used a leaf switch and not an optical sensor? just a guess, but since the write protect is pushed into the 'sensor' it seems to me to be for mechanical reasons. Like the potential for the older 8 inch drives to use a switch that gets depressed in order to detect if the disk is writable.

[@plgDavid]

funny thing is that 6582 Datasheet is way more readable than most other scans of the 6581 one our there.

[@ColinJonesPonder]

VIC doesn't have a HiRes mode. You need to fill the screen with double height characters (242 needed) and redefine the character set on the fly. I once wrote a simple machine code routine to do this. Could the RAM be affecting the Dead Test? The Lander game is Jupiter Lander. Jelly Monsters on the VIC20 is an AWESOME version. Don't judge it on first sight, graphics may not look much but it plays really well. It's also patternable, I think my record was about 4 hours straight before I had to go and do something else.

[@nilswegner2881]

What would be very cool is a combined ROM for the VIC-40 and basic v4. Then you'd basically have a PET 40xx with color.

[@ThePCPitChannel]

Did TRS stand for “Tandy Radio Shack”?

[@Breakfast_of_Champions]

It was short for "TRaSh 1980"

[@throwaway1076]

Eons ago, I used Screen40 (a similar program from Compute's Gazette that I think came after Vic-40) It is much the same at VIC 40, but lacks PET support. However, it uses 653 fewer bytes and therefore with an 8K RAM expansion it leaves 5119 bytes free. It was such a godsend when I was in my Vic days. *sigh*

[@WalterVaughanJr]

OMG. Developing with Profile and Scripsit is where I got my start in professional computer use and management. Profile which became filePro around the time of the Model 16/6000 is still under active development. There is a whole community of developers writing and supporting filePro code today. The developer of Scripsit is still around. I believe he sold the rights to Tandy, but The Small Computer Company just licensed Profile/filePro to Tandy. Fun factoid, the show runner for Big Bang Theory was a filePro developer, and Howard Wolowitz was named for one of the founders of Small Computer.

[@elfenmagix8173]

CBM v4 has builtin DOS commands. CBM v1 was on the PETs with the calculator buttons. CBM BASIC x2.0 was on the first PETs with the full size keyboard and a lot of bug fixes to v1. It is then used on the VIC 20 & C64.

[@Antireality]

I guess that the characters in the imagic game are reversed black characters, with the background colour showing through where you are supposed to see the sprite. That way if you set the background colour every raster line it will give you Atari VCS style lines of colour.

[@Charleshawn66]

Good video. TY

[@AndyGraceMedia]

Wow that takes me back to a 13 or 14 year old. You found the Vic's very under utilised multicolor mode, mostly because the resolution was so low at 88 x 164 with 2 bits per pixel. I remember writing a 40 column mode in assembler for the 16K expanded Vic and having it published, but by that time the C64 was released and people were upgrading. My implementation only allowed two colors and used the 176 x 184 hires mode and occupied 160x184 so characters were on a 4 x 8 pixel grid and it wasn't very readable for anyone who used an RF modulator. Remember one of those pixels was the space between characters so it really was a 3 x 7 pixel definition for the letters. That's also how the text in the Omega Race cartridge was generated. The last thing I wrote was a 32 column mode. That was much better because I could use a 5 x 8 pixel grid (4 x 8 for characters). W and M looked much better, but by 1985 most people had put their VICs in the closet and bought a C64.

[@evensgrey]

The version ofthe lunar lander game for the VIC-20 (in 1981) and Commodore 64 (1982) was called Jupiter Lander.

[@Narayan_1996]

25:01 Comrade Dyatlov would be proud of you 😂

[@HamishMcIntyreBhatty]

Loving the Rick Astley in the background XD

[@williamsquires3070]

Okay, Adrian, you just KNOW you want to send in that warranty registration card! 🤣😆😂

[@yauckt]

Fond memories using profile on my trs80. Sorting 100 entries took hours 😉😅

[@axemanracing6222]

6582 and 6582A are basically 8580 that you can still buy "new old stock". So for a emulation machine like the Ultimate 64 or the rebuilt C64 Reloaded it's perfect. Well, they're pricey...

[@kadlerio]

🎶 The write protect notch was once on the bottom Why they changed it I can't say People just liked it better that waaaaaaaay 🎶

[@espressomatic]

It'll always be Constantinople

[@danjeln]

Sorry to hear about your shoulder. I had the same issue with my left shoulder i went to a physician and he gave me shockwave therapy (small bumps to the shoulder.) maybe you have the same in UK. Anyway, i got better within 6 months. Best regards /Danjel

[@horusfalcon]

The Model II was always something of a queer duck - too big and bulky, too expensive, and rather poorly designed, but it's an interesting machine nonetheless, and deserves its rightful place in computing history. That it chose to use 8 in. floppies after all RS's previous products were already using 5.25 in. drives with more storage was a mystery to me. At least its successors, the Models 12, 16, 16B, and 6000 got away from the old 8" disks and provided much improved capabilities. Thanks for covering this hardware in a fascinating series of videos, and thanks to all your friends by mail who are helping you support this hardware even better.

[@ropersonline]

Sargon II actually had a reputation for being quite a decent chess game. The Lunar Lander clone there was probably the one called Jupiter Lander.

[@heskrthmatt]

30:17 The Commodore version was called Jupiter Lander. Wasted quite a bit of time on it back in the day.

[@OscarSommerbo]

Commodores version of lunar lander was named "Jupiter Lander"

[@RomDump]

Adrian wondering if you archive the contents of the Tektronix disks and put them online?

[@francoisbeaulieu179]

7:05 if they put the spindle lock on the bottom of the drive, wouldn’t you need to move the drive to engage it?

[@kaitlyn__L]

You engage the spindle lock after you’ve turned the drive off I believe

[@wintermute740]

Frozen shoulder syndrome SUCKS. It's like your should just decides "Yeah. I don't think I want to work any more." without any actual injury.

[@fnjesusfreak]

They had to rename them for the US, but in Japan Commodore published licensed ports of Galaxian and Pac-Man done by HAL - the Pac-Man port was a ton better as I recall than Atari's. And the Galaxian port was done by Satoru Iwata.

[@Doug_in_NC]

They renamed them for the European market due to legal threats/action from Atari, but didn’t even release them in the US or at most only sold them for a very short while. They are the rarest of Commodore-brand cartridge games for the VIC 20, even including the renamed European versions.

[@Ed64]

There was also “Avenger”, the Space Invaders clone

[@mjy]

I saw where someone decapped a 6582, and the die was marked 8580R5.

[@BaumInventions]

Drinking game : For every "Allright" you take a shot :D

[@j__r0d]

"I hope nobody sees this picture and makes fun of my hair in 40 years" - that guy probably

[@MrUSFT]

They must have hidden all the ashtrays when they took that picture of the radio shack repair lab.

[@Jerrec]

Here in Austria and Germany. when you took a Commodore 128DCR to repair because the 8580 was defect, you had a good chance to get it back with a 6582. No idea why they did this. I think they never sold it in new C128DCR,. They put them in, only when they got swapped out because of a damaged 8580. It is actually the same chip as a 8580, just rebranded.

[@Ed64]

I’ve also read that 6582 was the “consumer” version of the 8580 and it was predominantly used inside Dr. Evil’s SID Symphony cartridge. Glad to see that you checked the voltage requirements! 😅 @Adrian

[@bitdigital8052]

@@Ed64 yep, I have a SID Symphony Cartridge and can confirm it has a 6582 inside and connections for a 9v Battery

[@ricardog2165]

But the 6582 used 9v. Wouldn't it get damaged?

[@Ed64]

@@ricardog2165 It will get damaged on long boards which output 12v for the 6581

[@jason50146]

Everyone in that Radio Shack pamphlet are wearing ties. Bygone times.