Apple II

Video ROM & Keyboard ROM mixed up

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

Hi everybody

 

Forums: 
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

 

Forums: 
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.

Forums: 
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.

Forums: 
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

 

Forums: 
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 

 

 

Forums: 
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.

 

Forums: 
Apple II

Smartport Question & Solution

Submitted by VIBR on November 1, 2025 - 10:13am

Hello all, 

I creates here a separate thread regarding Smartport behaviour. 

Smartport is not exaclty working the same between the IIGs, IIc & IIe

 

On the IIc & IIe via Smartport SP card, issuing PR #5 starts the smartport with the command 0x85 to init devices and start reading first boot device (id the lowest)

 

On the IIGS it is a bit different, at boot time it, it start checking the SELECT pin LOW and init device.

If he find not drive or no boot drive, then it start looking at C600 for boot disk

Forums: 
Apple II

[VIDEO] Unleashing the Legend: The Apple IIe and the Disk II!

Submitted by Chris T on October 28, 2025 - 8:48am

Unleashing the Legend: The Apple IIe and the Disk II!In this episode, we're diving into a true titan of early micro-computing: the legendary Disk II floppy disk system for the Apple II. Designed by the brilliant Steve Wozniak, the Disk II wasn't just another peripheral—it was a seismic shift in engineering ingenuity. Its streamlined, cost-effective design fundamentally unlocked the full potential of the Apple II, tearing down barriers that shackled game devs.

Forums: 
Apple II

Single Step in Monitor

Submitted by decuser on October 26, 2025 - 5:10pm

Hi all,

I'm not seeing it, but then again, I may be looking in the wrong place. Does the default monitor or the DOS 3.3. monitor do single step? If so, how? If not, what did folks do back when? Even the KIM-1 had single step, so, it must've been pretty common...

Thanks,

Will

Forums: 
Apple II

Pages

Subscribe to Apple II