Apple II

Did the SmartDisk II ever work ?

Here is the github page (thanks, Wing, for pointing me to it):

 

https://github.com/btb/SmartDiskII

 

The front page claims that they replace the P6 PROM with a "2716 - compatible" EPROM. Which may not be fast enough to make the SmartDiskII work reliably in any Apple II.

 

In post #31 of this thread  I've shown the timing calculations  which call for a 150ns access time for such an EPROM substitute for P6:

 

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Smartport failure

Hi all, I hope someone can help me for my problem. Several months ago, i decided to upgrade my Apple //c rom 255 to 4x. Everything was great and i bougth a Floppy Emu which work fine too. After one month, I decided to buy a Fujinet Apple also to make tests. After several days, my Apple stopped to recognize the Fujinet Apple and the Floppy Emu with a "No bootable device" error. I tried to exchange the ROM 4X, nothing happened. The strange thing is that if I connect an external drive as a second unit, it works like a charm. All is working except the smartport !!!

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New member. New (to me) Apple II plus with interesting card

Hi everyone. I guess I've been bitten by the retro computer bug. I'm building a Ben Eater 6502 kit with plans to evolve it into an Apple II like board over time. I found an Apple II plus for sale locally and figured it'd give me a good reference/comparison. 

 

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Apple IIe Card: Add Hard Disks, Making Floppy Disks and Much More!

Apple IIe Card: Add Hard Disks, Making Floppy Disks and Much More!

The Apple IIe card, the last great hoorah for Steve Wozniaks and Steve Jobs love child, is in my Macintosh LC475, can I add multiple large hard disks to it? Can I write out 3.5" AND more importantly 5.25" floppy disks are well? How do we easily move data onto these disks? We look at the Floppy Emu and CiderPress II. Lets dive in and make the most of this wonder card from Apple.

 

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apple ii fujinet with real drives

Wondering if anyone out there is using their Fujinet in conjunction with real disk drives?  I have only had my Fujinet for a couple weeks so still figuring things out.  While I am loving the Fujinet I don't want to give up the abilty to use a floppy drive if possible.  I have tired many combinations with my Rom1 iigs, disk2 controller, yellowstone card, I/O controller card and can't seem to come up with a combo that lets me boot from the Fujinet but still have a working disk drive.   If someone is doing it I would love to hear what your setup is. 

 

Thanks, Chris

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Copying files to "Beautiful Boot" disks

Anyone know of a utility that will successfully copy (binary) files to a Beautiful Boot (BB) disk?  I know I can format a disk and put my binaries on there, then “beautify” it with the BB utility, but what if I want to copy a new file on there?  The docs say “Beautiful Boot resides on track 0, the disk’s VTOC is updated to free tracks 1, 2, and most of track 17 for more space.”

 

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IIGS not starting

I have been working on and off  on this IIGS motherboard.  I have got it to the point where the reset voltage is holding steady at +5 volts as it should be.  Mostly did this by swapping out some parts.  Now, the computer "starts" but hangs immediately.  I have included a screenshot.  

 

Does anyone have any idea what is happening?

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Apple II Programming - GOSUB GOTO RETURN

Hello. I'm trying to do some programming on the Apple II+, and I know that the stack can get weird between GOTO and GOSUB.

What I'm trying to do is GOSUB - GOTO - RETURN. The GOTO is in an IF. It looks something like this:

 

<code>

10 X = 1

20 GOSUB 50

30 END

50 IF X = 1 THEN 100

60 RETURN

100 X = X + 1

110 RETURN

</code>

 

I'm doing this sequence over and over again to display numbers, and I'm wondering if doing something like this would blow up the memory at some point.

- D 

 

 

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Apple II plus Dealer's Diagnostics

Does anyone know how the ROM checksum is computed in Apple II plus Dealer's Diagnostic?

 

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talk about ruining a good thing

ruining a perfectly good Apple II S/N 2569 chassis.

https://www.ebay.com/itm/317020875324?

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