Category Archives: Apple III

Apple /// – working finally (mostly)

Apple ///’s are strange beasts. They are not by any means as simple and sophisticated as Apple II’s were/are, no. They have their own many flaws but due different kinds of sophistication. This leads to funny situations. Like if your keyboard light is burned, the system wont boot. Aiming to perfection maybe?

My Apple /// (5v) is not working quite good after the Universal Powersupply-installation. Only problem seems to be the floppy drive. It does read most disks, but it fails to format disks that remains one issue to be solved. Or : if anybody have extra Disk ///-drive to sell me?

The light is on! That’s an good sign. We’ve running system.

The led of the internal floppy drive is there, so we’re good to go… maybe.

Apple /// dealer test. Everything else Passed expect the disk drive. It wont format the test disk. Maybe little cleaning will do the job.

Graphics tests went thru nicely. The Apple /// graphics are quite good i think. Just of cos, would like to get somehow this all in Color..

a3_utitliesSystem Utilities v1.1.

a3_clockOrdered the Apple /// clock upgrade-kit from (thanks Javier “Mr Retr0bright” for the help!) so we’ll be able to keep the time in the future.

The whole nine yards. My “mostly” working Apple /// in all it’s glory. Sure the Monitor II looks bit silly in top of the Apple /// but the Monitor /// i have is kind of questionable condition, meaning, i am hesistant to powering it up. Maybe i’ll find one or there’ll be VGA/DVI/HDMI option-card for the Apple /// someday in the future.

Got the “Alien Downpour”, a new homebrew game programmed and released by Michael Packard (order your 5.25″ floppy or c-casette tape) run in Apple /// in Apple ][ -emulation mode. I’ve tried to get this to boot few times (same media, proven to work with Apple IIe) but now it managed to boot itself. The game is difficult but really great coding and graphics. Michael is writing an book about the process of programming the game, wich i really look forward reading!

Now.. it would be really great if some of the Apple II/III community hardware wizards would make adapter so we could use Apple II joysticks with the Apple ///…. anyone?

Forgot totally, there’s an custom made cable’s made by Option8 at:
That allow to use of Disk II-drives with Apple /// – or if you wish, an SD-card drive like SDFloppyII from

So i ordered one of each of the cables. Finding working Disk /// -drive(s) is very difficult so this will do for the time being very nicely.

Needed & to-do-list:
– To find, Apple Monitor /// (230v)
– To find, External floppy drive, Disk ///
– Cleaning, repairing the internal floppy drive.
– Testing my ProFile drive & Interface cards
– Testing if the ClassicIDE-card (basicly CFFA2) works with Apple /// (CF-HDD)


Installing the Universal Power supply to Apple ///

I finally got around getting the “Universal Power supply” sold by for my “troublesome” Apple ///. Actually i have two Apple ///’s, the earlier 12v board version and later, 5v version. The 5v unit is far more better condition so naturally i wanted to get that running nice and smooth. I did earlier the 115>230v power supply pin-change in order to get it working in 230v AC but seems that the power supply would have needed total recapping as it just didn’t have the juice to boot anything up. So, the best solution was to get the “Universal Power supply”.

I am *not* an electronical wizard, so i was slightly worried about about the installation, even i knew it would be rather easy job, as otherwise, of cos, ReActiveMicro would not sell them.

There is two different kinds of kits available, one for the Apple II-series (II,II+,IIe,IIgs) and one for the Apple ///. They contain different parts due the nature of power supply model differences between Apple II-line and ///.

001_a3_upsu_partsHere where it all begins. The package came with the power supply PCB itself, the new power supply and few needed connectors and screws. I also ordered new power cable in order to get it all done right.

First thing is of cos to remove the old power supply by opening the screws (10 pcs).

When done, removed the old power cable and the old power supply (save the screws!).

The Apple /// power supply have two cables you need to remove from the power supply chassis. The LEFT BROWN cable (from the power switch) and the BLUE -cable from the old power supply connector.

005_a3_reallign_groundBefore installing the new PCB the ground connection cable needs to be slightly moved in order to give little bit more space the PCB to fit nicely. Loose the screw from the bottom and move the cable out of the way.

The new PCB installed. You need to use only 6 of the screws so i put the remaining one to the connector (far right) so it wont be lost.

The new power supply installed.

The new cables installed. The new cables didn’t needed to be peeled or anything, as the connector itself does than when you press the cables inside the connector.

After installing the stress relief cap over the newly made connections and we’re DONE.


I must admit it was really easy. It’s basicly impossible to do it improperly if you follow the installation instructions!

My troublesome Apple /// now works perfectly and i am very confident to use it in the future.


You can get yours from:

Installation guide and help:



New Powersupply for Apple ///

Finally got around ordering new powersupply – “Universal Powersupply” for the Apple /// wich i had problems with booting up. Hope this will make things better.. and no need to start investigating the motherboard itself. Will comment more when i receive this and how the installation goes.

“Universal Powersupply” from (Apple /// version)

And new powercable. It’s surely good idea to replace the cable for some 35+ year old computer while you are at it.

Wish me luck!


Apple /// – endless projects?

I have not one, but two, non working Apple ///’s. It’s pretty much normal if you own Apple ///.

No, these units are not found from Finland. I’ve never come across any Apple /// hardware in Finland, which is a shame. I know they had/sold 100’s of these (i have old stock inteventory listing which lists these) but i’ve never seen any in real life.

5v USA model. It’s pretty clean and seems to be working order (but that’s nothing in /// world).

And it’s serial. It’s an 120v USA model (those PSU’s are easy to convert 240v with just one jumper wire).

Like this: move the wire from 115v to 230v as above. Too bad, the caps on this PSU seems to be close to death, i can not get it to boot (feels like the current is not enough to power it up). I am in a process of getting an universal powersupply for it.

My european 230v powered, 12v board-model. It’s pretty rough…and dirty. Few caps missing, PSU works BUT needs recapping ASAP. The Profile powers up as well. It’s in project stage.. Have no idea if this could be made working in the end.

img_20151010_161447And it’s serial number. It is 128k model with extra memory board and that’s when we (again) get into trouble… (common theme with Apple ///?).

Cleaning the memory board.

img_20160424_1503332The RAM-test in boot (diagnose) gives out results like this…

..and i’ve managed to get it almost working with replacement board and swapping the chips. Still quite not there however. It could be the PSU issue as well.

apple-iii-collectionBrother’s in arms. Maybe someday one of them is made ALIVE! again…


Some German technical manuals scanned to PDF+OCR

Scanned some German-language technical manuals to PDF with OCR and are downloadable at and also in Asimov.


Apple II – Disk II Laufwerk – Technische Verfahren (Rev. 31.8.82-German)



Apple III – Technische Verfahren (Rev. 12.23.82-German)


Apple III – Technische Verfahren – Externes Diskettenlaufwerk III (Rev. 28.3.83-German)