Apple II

2513 char gen / 2716 eprom adapter issues

Submitted by blindowl on March 17, 2021 - 1:20pm

Hi, I have a II+ rev. 4 with a Swedish 2513 character generator that I want to replace with an English character ROM. I've built a little adapter board so I can use 2716 EPROMs (or actually 28C16 EEPROMs), using this PCB as a template: https://oshpark.com/profiles/Benchoff

 

Everything works fine except the first column of pixels is always black: 

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Apple II

IIgs mono text mode?

Submitted by TimCross on March 15, 2021 - 11:21pm

I have a Rom 01 IIgs which has been working fine.  But all of a sudden, the initial text mode is only showing up in monochrome over composite.  I have it set to blue but I only see gray.  I tried going back into the control panel and switch the colors but it is only monochrome.  I also tried unplugging the battery and going back to defaults but no change.

 

Weird thing is that games are still working in color.  Conan, Arkanoid 2, even GSOS still show up in color.

 

Any idea where I should start looking?

Thanks!

Tim

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Apple II

Cabling for Franklin 80-column card?

Submitted by cryu on March 15, 2021 - 9:24pm

Hello,

 

I've managed to get my Franklin to the point where it can boot off of the FloppyEmu (which required modification of the video circuit; I'll write that up at some point).  Now it's time to get all of the peripheral cards working.

 

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Apple II

Apple II,II+, IIe SD card floppy or HDD emulator cards

Submitted by Stargeezer on March 15, 2021 - 10:52am

All:

I am looking for opinions on what people feel are the better SD card and/or USB drive storage solutions for Apple II, II+, IIe.  I found the CFFA3000 online but it looks like that is out of production for now.  (If schematic is open source I would love to have a copy as I have several empty proto-boards).

I am more looking for DIY versions vs off the shelf.

Any input of your opinion or experiences is most welcome.

Thanks,

Mark

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Apple II

Apple //c Blown fuses.

Submitted by DistantStar001 on March 14, 2021 - 3:57am

So My //c just up and quit on me a few weeks ago.  Would have gotten to it sooner, but I had to replace my multimeter.  However, now that I have one again, I was able to trace at least part of the issue to a partially blown fuse in the power supply.  It's not completely blown, as I do get some continuity across it, but there's a lot of resistance and it was only putting out about 0.2 volts.

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Apple II

Help identifying an Apple ii video card 184-42-010

Submitted by PTB on March 13, 2021 - 7:06pm

Hi all,

 

Just wondering. Does anyone have any information available on this video card.

 

I think it was made by DEC and has the number 184-42-010.

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Apple II

Looking for a specific book of BASIC games

Submitted by Kyle6502 on March 11, 2021 - 3:50pm

For quite a while now I’ve been looking for an old book of Apple II games I used to check out from the library when I was a kid. It had a Space Invaders clone in it, and it was just about the only Apple programming book I've seen which extensively used sprites in its programs. Several of the games had sound effects routines encoded in DATA lines. But I don’t remember the title. The font was tiny and the programs were very long, and I think the cover was yellow, but my memory of it has grown hazy. Anybody know what this book was?

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Apple II

Apple IIC floppy drive can read.. but not write floppy

Submitted by devtordins on March 10, 2021 - 4:56pm

Hi, I have a very strange problem with an Apple IIC.  (To better understand the issue I attached 3 videos)

Initially I suspected the problem was the drive, so I bought a new one but got the same behavior (Heads cleaned on each one).

I can read, but not write or format floppy (by using ADTPRO). I also tried to load DOS using ADTPRO and execute the command INIT HELLO, without no success.

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Apple II

Disk ][ Interface Card Error

Submitted by appleiiapple on March 10, 2021 - 1:30pm

Well, I did something stupid today.  My apple IIe was powered on and I removed the Disk ][ Interface Card.....  Now the card will not allow the system to boot, green horizontal strips.  Remove the card no problem.  What would be fried on the card?  I can't figure it out with my basic multi meter test.

 

Thanks

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Apple II

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