Apple II

Troubleshooting the II+ cassette interface

Submitted by Fuji on January 13, 2020 - 11:50am

UPDATE 2: ... and now I've gotten the 16K RAM card to work as well! Things are apparently moving forward quickly today!

Could be reseating some ICs, the IDC cable, the card itself in the slot or something else.. In any case it appears to work now and I've even gotten ADTpro to transfer with ProDOS, so that's one HUGE leap forward! I am however confused about some details regarding ADTpro, but think I'll post about that separately.

 

UPDATE 1: I just discovered that the cassette IN actually works! (after posting my message below).

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Apple III video issues

Submitted by nicko6113 on January 12, 2020 - 6:51pm

hello i just joined this forum in hopes to get my apple III working again.

 

i have what i believe to be the mem diag screen. however it takes up the entire screen and is mostly random garbage. 

however if i remove the ram board completely i get a solid white screen.

 

i have tried reseating all the chips on the motherboard. and i swapped around ram chips to see if i could atleast get it to display a normal mem test. nothing i did changed it.

the on light on the keyboard is also working.

 

does anyone know where i should start looking? 

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Maybe it’s a clone?

Submitted by Fuzzyman on January 12, 2020 - 5:34pm

I was on the hunt for old keyboards and a guy in my area was selling off all the parts from his former computer repair business. One picture showed a bit of what appeared to be 70's vintage in a very large case. They were Honeywell Hall effect switches (cool!) but I opened up the case and there was some kind of motherboard in there. He asked for $10 and I walked away happy.

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Apple III without any text

Submitted by macbengt on January 10, 2020 - 9:14am

Hi Applefritter, this is my first thread in this fine forum.

I have an Apple III bought on ebay. It was sold as defect, it was dead on arrival. Model  A3S1 no 57901  motherboard  820-0043-00E  5V memory board, american keyboard. The power supply was dead. Defect KB lamp. A defect trace on the MB so no voltage to the KB. After replacing with a new PSU, new KB lamp and repair of the Mb the Apple III is partially working.

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Unreadable disks -what's the cause?

Submitted by Fuji on January 10, 2020 - 7:06am

Having had my Apple II+ clone in storage for a few decades I pulled it out and after some repairs have gotten it to work again.

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Apple II

Apple II plus diagnostics card / ROMs

Submitted by CheshireNoir on January 7, 2020 - 6:35pm

Hi again,

So I'm still trying to get my EuroPlus working reliably. It's getting there, but I'm having a hard time tracking down some faults. 

(I've bypassed the PAL card for now, and I have a spare coming in a few weeks that'll help me isolate that part donw)

For most other systems I've worked with, there's usually a diagnostics card / cart / ROMset available. I know the later models had diagnostics built in, but this is only a Plus. 

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Apple II

Need Help With Apple IIGS Memory Error

Submitted by Ahow77 on December 31, 2019 - 4:44pm

I have a rom 1 IIGS with a 4mb expansion card and I'm trying to get a music program called Sonix to work with it. I'm using Floppy Emu rev B to load the image. I get past the initial ProDos 8 title screen then it shows this memory error:

"Allocate 0101
***MEMORY ERROR***
Must be user #1
De-allocate all managed memory "

Then it gives me a command prompt and I don't know how to proceed. Any help would be appreciated.

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Apple II

Source for speech IC's used in the Mockingboard

Submitted by jbailey on December 29, 2019 - 7:33pm

I am working on refubishing an Apple IIe, and have tracked down many oroginal add-on cards.  Does anyone know of a source for the optional speed chips used for the Mockingboard?  I understand the following IC's are compatible, unfortunately, Google searches seem to only present data sheets .

 

* SC-02

* Arctic-02

* SSI-263P

* SSI 263AP

* 78A263A-P

 

any pointers would be appreciated, thank you for your time.

 

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Apple II

Getting a DuoDisk unit working again...

Submitted by joel_graff on December 28, 2019 - 3:23pm

I came into posession of an Apple IIe with a DuoDisk unit.  It sat for years in a barn and is caked with mud dauber nests on the inside.  As I'm cleaning it out, I've torn down one of the two DuoDisk drives and I want to establsih two things:

 

1.  Whether or not I need to do the DuoDisk mod to the analog board

2.  How to test the stepper motor before putting everything back together.

 

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Apple II

Apple II Plus Power Supply Failure

Submitted by Samuel Pickwick on December 28, 2019 - 2:03pm

I powered up my Apple II Plus for the first time in probably over a decade last night (which I bought new in 1980). After running for a while a burning odor was detected; I shut off and uplugged the unit, removed the cover, and detected a thin stream of smoke coming out of the power supply. Is there a list of compatible and available new supplies to be used as a replacement? I was going to survey the damage but could not easily/quickly remove the p/s cover, it seemed like it was welded shut.

I appreciate any advice!

Thanks.

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