Apple II

Apple II Plus won't boot (no beep, screen full of squares)

Submitted by Akagi on May 13, 2023 - 6:36pm

Hi all, me again. I am really appreciative of everyones help with things so far. Unfortunately one of my problems got worse! 

 

The machine has never liked sitting since trying to resurrect it, if I leave it overnight unplugged, the next day it will often fail to start without fidding.

 

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Apple II

5.25” Floppy

Submitted by clamm on May 12, 2023 - 12:03pm

Howdy folks,

I've got a 5.25" floppy disk that used to just boot up in BASIC with a home made loader. At some point, it just stopped working. Side B works, though.

 

What is the best method that I can go about making a backup of this disk in its current state and then dissecting the data in hex... or something?

 

I am hoping to either recover what's left, figure out what got corrupted, or simply figure out the names of the programs that were on Side A. 

 

Thanks for all your insights!!

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Apple II

Apple //c monitor transformer replacement

Submitted by tony359 on May 11, 2023 - 3:47pm

Hi all,

 

One of my apple 2c monitors have a faulty AC transformer. The secondary coil is open. That's a 16V AC one. I'd like to replace it, it won't be identical but as long as it fits...

The original one is 60x60x50mm. The ones I can find online are 60x50x32 but only 20W. According to the schematics, the 16VAC is a 1A line so that's 16W. 20W transformer feels a bit tight. But all listings I can find online show the same dimensions.

 

Are there any options anybody could think about?

Thanks!

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Apple II

Videx Videoterm clone, no display output and no beep. Help? :)

Submitted by Akagi on May 10, 2023 - 6:08pm

Hi all, I am having some issues with my Unitron 80 column card (Videx clone). The machine was sat for 30+ years so I have no idea whether it had any pre-existing issues, but lets assume not!

 

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Apple II

Apple II Memory Expansion Card problem

Submitted by John L on May 9, 2023 - 9:31pm

My Apple II Memory Expansion Card (which has 256KB onboard) is not detected by ProDOS as a RAM drive.  It's presently in slot 4 of a Platinum //e and when I run Copy II Plus to format it as a ProDOS block device it succeeds but when I access the drive it says it's not recognizable as a DOS 3.3 or ProDOS device. I can verify the drive using Copy II Plus and it appears to be the right volume size (512 ProDOS blocks).

 

I've tried replacing the RAM modules with known good one's but that hasn't made any difference.  Any ideas ?

 

 

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Apple II

*Newly acquired box-fresh Apple II Plus! || Project log + newbie questions*

Submitted by Akagi on May 9, 2023 - 4:02am

 

Hi everyone! I came across this forum when searching regarding the keyboard on my Apple II, and I found this helpful thread about converting to Cherry MX keyswitches. https://www.applefritter.com/content/cherry-mx-datanetics-dc-51-keyboard-switch-adapter

 

So I figured I might as well sign up and say hi. :)

 

I recently acquired this early Apple II Europlus (European Plus variant) which had been sat in its original box for over 30  years! 

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Apple II

Apple 1983

Submitted by Khaibitgfx on May 7, 2023 - 2:51pm

Desktop wallpaper in 3 different resolutions...

 

 

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Apple II

Dim/fuzzy output on IIe

Submitted by Mrarkus on May 6, 2023 - 9:11pm

Just picked up an Enchanced IIe, and it has a wierd problem - pretty low video output, and a bit fuzzy, connected to my Apple Monochrome monitor. My other IIe is crisp and much brighter. Any idea where to start troubleshooting?

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Apple II

Homemade MMU and IOU progress thread

Submitted by frozen signal on May 6, 2023 - 11:11am

Hello everyone,

 

I will post my progress on my homemade MMU and IOU here in this thread.

I just made my sources for the MMU publicly available here: https://github.com/frozen-signal/Apple_IIe_MMU_IOU

These sources are licensed under Creative Common Zero (public domain). I wanted to wait before releasing them until I did due diligence and identified the problem, but that may take a while so I made the repo public this morning.

 

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Apple II

Apple //c keyboard replacement

Submitted by John L on May 5, 2023 - 2:13am

I am looking to replace my ROM 255 Apple //c's keyboard (presently an 820-6509) with a newer ALPS model (658-4087).  Will this work without problems ? 

 

 

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Apple II

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