Apple II

Apple II Plus with unknown board rev. 820-0044-00?

Submitted by jherrm on October 18, 2022 - 2:38am

Hi, I'm new here but have been a lurker for years. I recently received a nice Apple II Plus that had a few cards (including a Videx Videoterm and MS language card), and I just noticed this logic board's part number is not documented online: 820-0044-00

 

The only 820-0044-XX revisions I can find info on are: 820-0044-01, 820-0044-C, and 820-0044-D, with the main source being the defacto  The Apple II Circuit Description:

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Apple II

Testing 80 column card?

Submitted by gmc on October 17, 2022 - 6:16am

I've got a 80 column card (820-0066) off eBay for my Apple II that had a faulty 74LS245 chip which I replaced. Is there any software I can use to run a full test on it to see if there are other issues (RAM?)

 

If I run PR#3 it goes into 80 column mode so looks like it's working, but wondering if there is a more indepth test I can run?

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Apple II

Apple Disk II drive and compatibles

Submitted by GianDO on October 16, 2022 - 3:16pm

Hi,

Is there a way to connect the Apple Disk II (and compatible) floppy drives without having to open the lid of Apple II every time, like Unidisk or Duodisk?

Thanks

G

 

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Apple II

Need help setting disk ii speed

Submitted by mochatea396 on October 16, 2022 - 11:01am

Hello group,I have a disk ii drive that I can’t set the speed on. I use the Apple dealer disk alignment aid software as I always do. If anyone’s not familiar with this program 0 is in the center representing 300rpm. Either side of the zero will represent positive or negative. It shows a -1500 (which I know is not near accurate). Turning the variable resistor it will jump to +1500. Then bounce back and forth between the two positive and negative extremes without touching the resistor.

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Apple II

Apple IIc Video Output via 15-pin connector

Submitted by andydiags on October 16, 2022 - 2:18am

Hi All,

Verault on eBay sells these Apple IIc connectors that claim to improve the video output via composite.

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Apple II

Advanced Disk Utility Manual

Submitted by Beach71 on October 15, 2022 - 6:14pm

Can anyone point me to a manual for Advanced Disk Utility and formatting IIgs hard drives?Thanks

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Apple II

Apple IIe with color TV via RCA

Submitted by GianDO on October 15, 2022 - 12:04pm

I connected my Apple IIe to a color TV. Why are the colors not clear, but they appear rainbow?

Thank you

G 

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Apple II

IIgs - scsi card - zip drive setup.

Submitted by Beach71 on October 13, 2022 - 5:05pm

I have an Apple IIgs, 6.0.1, cffa3000 acting as a starup HD in slot 1, a GGLabs A2SCSI card (clone of Apple II SCSI Card) in slot 7 and a SCSI Zip drive. At the moment, no 800k drive.

 

My plan was to intialize Zip disks with a 32 meg ProDOS partition (booting HD)  and a HFS partition on each. At the monemt the GS does not recognize the ZIP. If the disk is in on startup .. nothing. If I insert after the desktop appears, nothing.

 

Anyone have any idea how I might get the Zip recognozed by the GS and formated?

 

Thanks

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Apple II

IIe drive in a IIc

Submitted by Statsman1 on October 13, 2022 - 4:28pm

Hey everyone!

Wow, it's been quite a while since I was here!  Hope everyone is OK, survived COVID as well as one could hope, and still enjoying the hobby!

So I have a IIc that I have taken out of the battered IIc case and would like it to run a longer disk drive cable.  I believe that a Disk II cable will work, and it certainly seems to work just fine.  However, the Disk II ALSO works (not just the IIc drive), which I found fascinating, though that is likely old news to you pros.  :)

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Apple II

EMCO Joystick

Submitted by nick3092 on October 11, 2022 - 8:32pm

I picked up this EMCO brand joystick a little while back in a lot of stuff, and can't find much information about it.  It's a dual Apple/IBM joystick, with a switch on the bottom.  Then there are 4 pegs that look like some kind of adjusters sticking out of the bottom.  They aren't for centering/trimming though, as those adjustments are on top of the stick.  The pots measure just shy of 1Meg across, which seems odd to me.  And the switch for Apple/IBM mode seems to switch in or out 2 resistors.  I didn't have time to trace everything out to see exactly what is going on.  The stick seems to w

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Apple II

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