Apple II

Apple II Programming - GOSUB GOTO RETURN

Submitted by DrkStarr on June 24, 2025 - 7:53pm

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

Apple II plus Dealer's Diagnostics

Submitted by dorkbert on June 23, 2025 - 6:06pm

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

 

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Apple II

talk about ruining a good thing

Submitted by dorkbert on June 22, 2025 - 5:55pm

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

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

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Apple II

Getting a GGLabs A2SCSI card working on a IIGS

Submitted by Chris T on June 22, 2025 - 5:38pm

Hey, I am relatively new to the IIgs, and in my enthusiasm to get it up to the level of an Amiga 2000, I decided to buy a SCSI card, and ideally install GSOS to a hard disk and boot from it.This seems to be, possibly a faster method than booting from a smart port disk?

So to do this I bought an A2SCSI card from GGLabs a couple of years back, and only now am I installing it, as I also have an Apple Squeezer card.

 

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Apple II

Assistance with cc65 to test new functionality

Submitted by russell-harper on June 22, 2025 - 5:28pm

Greetings,

I'm working on implementing conio cgets in cc65 https://github.com/cc65/cc65/pull/2705. The code reviewer has asked that I confirm functionality in at least Apple ][, Atari 800, and C64.

Looking at all the options for cc65 to compile Apple ][ programs https://cc65.github.io/doc/apple2.html, I'm not sure which to use. Can I get some advice on what the best options are?

Also, if I have an executable, would it be okay to post or link to it here to ask users to test?

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Apple II

QC10-20 manual

Submitted by Wayne on June 21, 2025 - 10:57pm

There’s already a scan of the Quark QC10 manual out there but this one is a year newer. It’s mostly the same but has a few more pages, has links and is searchable

https://drive.google.com/file/d/13CFKZVtz1WjArSxaNX8M9d1DhHDeWULG/view?usp=drive_link

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Apple II

Help me find the source of the mysterious PSU ticking noise

Submitted by geerlingguy on June 20, 2025 - 5:35pm

Our Apple II project keeps hitting little speed bumps...

Today after my Dad spent a couple hours re-seating almost all the chips on the board (cleaning with Deoxit), we had turned it on a few times and it was fine.

But then after the final few chips were re-seated, and everything was plugged in, the PSU started ticking, maybe a few times per second.

Pulling off the PSU cover and listening relatively closely, we couldn't determine exactly where the ticking is coming from, but it seems to be coming from the side more near the back (where the power plug is).

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Apple II

FujiNet

Submitted by mreg376 on June 9, 2025 - 12:08pm

I did a search here and can find nothing on FujiNet.  It looks like an excellent resource for multiple retro, including Apple II, platforms, and seems to does it all, from Smartport and floppy EMU-type support, Internet access, printing emulation and printing support, CP/M emulation, etc, with ongoing development and a relative minimal investment.  Anyone familiar with FujiNet?

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Apple II

IBS AP53 - Floppy Disk Controller - PCB marked as AP41 - why ?

Submitted by tokabln on June 9, 2025 - 10:32am

Gents,

just a question regarding a floppy controller from IBS sold as AP53.

Does anyone know the history behind while the raw pcb is marked as AP41 ?

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Apple II

Sup'r terminal 80col restomod : power resistor ?

Submitted by CedsRepairs on June 9, 2025 - 5:00am

Hey everyone

 

Sorry for the slightly obscure question — I’m working on restoring an Apple II "Sup'r Terminal" 80-column card.

By "restoring," I mean I've noticed that the board has several ICs that are known to fail over time, so I'm adding sockets for each chip to make future repairs easier — even decades from now.

 

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