Apple II

Why is Quadlink built-in DISK II drive controller so picky to PC drives?

Submitted by retro_devices on December 12, 2024 - 6:06pm

Hi. I recently acquired from local aftermarket a Quadlink board. It uses unusual DISK II drive controller, which is very picky in relation to diferent 360K PC drives. Roughly 40% of my otherwise perfectly working PC drives are reading well diskettes writteln by  standard Apple2 computers. The rest fail when used to read Apple2 diskettes. The problem occurs with decent  error rate on external tracks usually from 0 to 9. The more the head moves to inner tracks the more the "non working with qudlink" PC drives read flawlessly inner tracks.

Forums: 
Apple II

Apple II+ drive boot diagnostics

Submitted by Stargeezer on December 11, 2024 - 4:13pm

Hi all:

I hope everyone is having a nice holiday season.

I have retruned to working on an Apple II+ and could use a nudge in the right direction.

 

This is an Apple II+with an 820-0044-C board.

The machine will not boot from the disk drive. Here are the steps I have take thus far:

Forums: 
Apple II

APPLE DUODISK I/O ERROR DISK2

Submitted by Apple IIe 1984 on December 11, 2024 - 3:37am

IL DISCO 1 LEGGE E SCRIVE, IL DISCO 2 DA' ERRORE I/O

Forums: 
Apple II

9 pin Joystick to DIP 16 Adapter for Apple II+

Submitted by whynotpizza on December 10, 2024 - 7:56pm

Anyone have an extra they wouldn't mind sending my way? Looking to use my A2io Bluetooth but need this 9pin to 16pin connector. Thanks // David

Forums: 
Apple II

Apple IIc short circuit on PSU even with power off

Submitted by CedsRepairs on December 9, 2024 - 12:01pm

Hello everyone,

 

I used to have a perfectly working appleIIc, cleaned, retrobrighted, etc.

Today I wanted to use it again and it doesn't power up, making an horrible ticking noise, leds trying to light up and then coming off, like a short circuit of some sort

Sure enough, when powered with a lab PSU on 12V it triggers the maximum current protection.

 

What's weird is that this happens even with the green power switch OFF. 

 

Forums: 
Apple II

News: Retronaut is about to change forever!

Submitted by Chris T on December 8, 2024 - 12:01pm

News: Retronaut is about to change forever!

Retronaut has been very quiet of late. But that does not mean we have gone away. Absolutely not! In fact we have been doubling down on the Channel and we hope the news we have will make you as excited about its future as we are!

Forums: 
Apple II

HIGH RES GAME LABELS

Submitted by Khaibitgfx on December 6, 2024 - 11:30am

Forums: 
Apple II

SMK long or short stem ?

Submitted by desiv on December 5, 2024 - 7:30pm

I need to replace a keyswitch on my //e.

It is an SMK, but I see there are two kinds (at least for a standard key, which this is).

Short stem or long stem...

How do I know which one I need to buy to replace it?

Is there something I can measure?  Do I have to take the old one out and take it apart to measure?

I see both kinds for sale on e-bay, but want to make sure I get the correct one.

Thanx

Forums: 
Apple II

DuoDisk Light Always On - Help Needed

Submitted by Skid-Wheel Playz on December 1, 2024 - 3:52pm

Hey all! I recently picked up an untested DuoDisk for use with my Apple IIe. It came damaged, which was fine, just a bit of brittle plastic that I had to repair. I'm currently at the stage where I've troubleshooted a lot, but nothing has really changed. At the beginning, the LED on the front wouldn't turn on at all, and I only heard the spin motor (not the stepper) spinning endlessly.

Forums: 
Apple II

Pages

Subscribe to Apple II