Apple II

Apple //e: DuoDisk Format Track $00 Errror (both drives)

Submitted by atomicham on November 24, 2025 - 1:46pm

I have an Apple //e with a DuoDisk Card and Drive Unit. I haven't used it in many years, preferring modern solid state; however, I wanted to get the drive going again. I tested it as-is and found speed issues. I performed maintenace to clean the heads, correct the speed, clean up, etc. Drives are operating as they should (speed check, etc.).

 

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Apple II

Apple II plus with videoproblems

Submitted by macbengt on November 22, 2025 - 8:27am

Hi, I have an Apple II + that has started to behave rather strange. ( Apple II plus motherboard 820-0044-D RFI NTSC). The screen starst to show several zero on the blank screen. On starting up its perfect and its running fine and can read from floppy disks. After some minutes the zeros starts to appear. First som few zeroes, gradually increasing

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Apple II

[Video] Apple II Storage: The ULTIMATE Timeline Deep-Dive (From Disk II to SuperDrive!)

Submitted by Chris T on November 16, 2025 - 10:56am

Apple II Storage: The ULTIMATE Timeline Deep-Dive (From Disk II to SuperDrive!)For two decades, the Apple II family was a home micro pioneer! This deep dive celebrates its legendary storage history: From the revolutionary Disk II system and the birth of micro-hard disks, through the essential UniDisk 5.25 era, all the way up to the high-density drives of the IIe and IIGS.

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Apple II

Video ROM & Keyboard ROM mixed up

Submitted by Hogfather on November 16, 2025 - 6:05am

Hi everybody

 

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Apple II

KansasFest Town Hall Tonight

Submitted by jwg1962 on November 14, 2025 - 6:29pm

Hello All, 

 

Tonight is the town hall where we will begin the process of selecting the venue for 2026 KansasFest. Join in at 8:30 PM Eastern.  

https://www.youtube.com/watch?v=wVkTwWhmtdY

 

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Apple II

CPU65816 in the Apple II

Submitted by gregor on November 14, 2025 - 3:14pm

Hi.

I'm in the process of building an accelerator based on the Cortex-7 processor.

I'm currently emulating the 65816 and i8080, and also running ARM Cortex-7 code.

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Apple II

Bit of a disaster

Submitted by Wayne on November 11, 2025 - 3:12pm

Had a bit of a disaster.

I picked up this ide Superdisk and tried it out first with a Mac Digital  Audio running OSX where it worked perfectly.

Then I tried it with a MDT. No luck. Next I connected it to an Acard SCSI IDE bridge and my Ramfast seemed to know it’s there but wouldn’t mount the disk. Also tried an Apple Hi-Speed SCSI card. I’d  tried this before with the mechanism from a USB Superdisk where it worked fine but not this time. I was a bit stumped so I put the Superdisk aside while I thought about it.

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Apple II

DOS INIT I/O Error

Submitted by VIBR on November 9, 2025 - 4:37pm

Hello, 

I continue my quest with the Apple II Disk Emumation, 

I open a new thread to share with you a specific issue, I am facing with the Smartisk Floppy Emulator.

When doing DISKII Emulation, I am testing the write part and I have very strange behavior with DOS Init disk procedure.

 

Using an Apple IIe (with 2 different DISK II card):

- Boot DOS, and INIT HELLO => I/O Error both an real Disk II and SmartDisk emulator,

- Using LockSmith Cerify, Fast Backup, Backup => no issue

 

Using a IIGS no issue using DOS Init

 

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Apple II

DiskII & Smartport Logic Analyzer protocol decoder

Submitted by VIBR on November 6, 2025 - 1:52pm

Hello All, 

I have been developing 2 protocol decoder for sigrok / pulseview:

- Smartport

- DiskII

It can analyze each bit / byte/ drive sequence and log everything including nibble and denibble data on a log file and corresponding tag on the GUI

Sigrokprotocoldecoder

I have published my code on github and I hope it will help other people in this forum.

Vincent 

 

 

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Apple II

Making sense of Memory

Submitted by decuser on November 2, 2025 - 10:55pm

I have been reading dozens of memory maps trying to make sense of them and not having a huge amount of luck. It's all quite confusing. I'm hoping some of y'all might have the special sauce.

 

John Relay's Apple II Info site is about the best I've seen in terms of a simple map.

 

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Apple II

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