Apple II

Connecting Mac Plus floppy drive to gs

Submitted by nebular on May 29, 2020 - 1:28am

So I was able to salvage a GS from our local ewaste facility and I've been able to get it up and running with ADTPro (speediboot however doesn't work, and I seem to be only able to transfer over serial with pin 8 on the gs serial port empty). Trouble is it only had a 5.25" floppy drive, and I have no disks (and no money to buy them online). I do however have a couple Mac Pluses, a couple LCs, A Mac II, a Classic II, and an M0130 external drive (ewates has been good to me). So I'm flush with mac 3.5" floppy drives and I have a 20 pin ribbon to DB-19 adapter from the M0130.

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SONY KV-5200

Submitted by Timelord on May 28, 2020 - 11:51pm

Is there any chance that one of you might have a repair manual or schematic for the SONY KV-5200 (1979 colour NTSC portable television)?

 

I have one that does not power on, at all, and it is a beast to take apart. Before I tear it down, it;d be nice to know where to look for faults. This telly use DC12V or AC120V, so perhaps something in the switching circuit is stuck? It also had a battery pack from the factory, but I see no reason why it would not work if there was no battery and it was not set in charging mode; although perhaps the charging mode circuit is stuck?

 

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Need help with identification/classification of Apple II

Submitted by Stubby5000 on May 27, 2020 - 10:50pm

Hello all. I'm new here and just learning about the Apple II; forgive my ignorance. I have the opportunity to purchase an original II. It has serial number A2S1-22012 and is board revision 820-0001-07. It appears to have onboard Integer ROMs (only four??) and an Applesoft firmware card. The owner believes the mainboard was replaced at some point, but he's adamant that it's still a "real" original II. I have another contact who believes this is a II Plus mainboard in a II's case, making it clearly much less valuable/desirable. Below you'll find all the pictures I have of the unit.

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AE Viewmaster 80 System Crashes

Submitted by Timelord on May 26, 2020 - 8:37am

I recently received a Viewmaster 80 (AE) card, and when I insert it into a slot, the system refuses to boot, and gives a repeating click from the speaker. Have any of you see that before? I am tempted to swap the PROMs, but I'm not sure if that is where the problem exists. 

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Language Card, Screen Filled with '?'

Submitted by Timelord on May 23, 2020 - 6:59am

One of my Apple Language Cards causes the following to occur:

 

The screen filles with the symbol '?' and the system locks up.

 

I have never seen this before, and I'm unsure what would cause it. Have any of you see that happen?

 

I suppose it could be a faulty 4116, but IIRC, I pulled the RAM and it still happened, and the Apple language card should work with the RAM removed. 

 

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General Questions [about the Apple IIe]

Submitted by diychris on May 22, 2020 - 10:28am

So I purchased an Apple IIe yesterday. It wasn't working, had horizontal bars across the screen. After much troubleshooting, replacing the 6502 did the trick.

I had an old Rockwell 65c02 lying around so that's what I put in. I'm not sure if that's going to cause any issues at all? I believe there are some differences between the 6502 and 65c02 but I don't know how those would relate to any issues with the Apple IIe.

 

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ASCOMP

Submitted by BillO on May 21, 2020 - 1:49pm

Hi All.

 

ASCOMP seems to be a bit hard to find on-line.  User mutant_pie had once sent me a diskette with ASCOMP on it (about 4 years ago).  So, me, having an incredible sense of urgency, have finally gotten around to making an image of it.  Find it attached. 

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eBay Sharks: Beware new eBay freight costs!

Submitted by Timelord on May 21, 2020 - 4:11am

Here is a good example of a pure eBay shark:

 

https://www.ebay.com/itm/Apple-IIGS-A2S6000-Computer-with-Keyboard-and-Mouse/383289451692?hash=item593dd4e4ac:g:h7kAAOSwndFd3rPg&autorefresh=true

 

He is asking USD$150+ for a //gs, and he put a US$INSANE freight cost on it. Even in the states, this is US$600, in a horrible condition, 'as-is, for parts'.

 

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Strange CRT effect

Submitted by Steven Carpenter on May 20, 2020 - 7:17pm

Hi everyone,

 

I just picked up a broken Apple IIe on craigslist. I am working on replacing the motherboard video rom chip and CPU but that is not what this post is about. I got a monitor with the computer, Taxam company. I tested the monitor with my IIGS. The monitor works but there are slow moving areas of horizontally compressed display that start from the bottom of the screen, slowly move to the top, then restart at the bottom. Only one compressed area exists at a time.

What can I do to fix this? I have included a picture below:

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Apple II

Vertical Line of "Dead Pixels"

Submitted by Matombo on May 19, 2020 - 5:10pm

I need some advice on an  issue of an apple II europlus

It has a vertical row of dead pixels on the screen (see picture).

It happens regardless of which screen i use (i have  old monocrome monitors here and my current tv also still has a component in)

And the screen in the picture works fine when i connect it to my dads ITT Apple II

So it has something to do with the device itself. Any guess what causes an apple II output to be almost good?

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