Apple II

HS SCSI card died

Submitted by nick3092 on April 15, 2023 - 5:19pm

About 2 months ago I got a bluescsi for my Mac plus, and decided to pick up a high speed scsi card for my IIgs. I hadn't used the IIgs a lot since, but it was working. The past two days I had been using it more. Today suddenly GSOS was prompting me to insert my virtual drive when trying to shut down. I had no choice but to power off. When I powered back on, the boot screen hung, and eventually it tried searching slots 6 and 5. So the IIgs saw the scsi card in 7, but couldn't find the drives.

 

 

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v2 Analog

Submitted by Ronin47 on April 14, 2023 - 8:17am

I've just built one of these:

 

∀2 Retro Computing - Analog (v2retrocomputing.com)

 

And I have to say the output is beautiful compared to composite, here are a couple of pics:

 

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Metal square over 3.5" drive head fell off, is it required?

Submitted by jasonnovak on April 13, 2023 - 12:45am

I opened up the 3.5" floppy drive from my IIgs to retrobright the case and two small metal squares with numbers printed on them fell out. Checking pictures the drive, it looks like it was glued right above the head. The top I can access, I assume on the bottom you have the tear the drive down completely. Not sure what these do, if it's ok to just leave them off?

 

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Changing the Apple //c Startup Text

Submitted by RadioC1ash on April 12, 2023 - 9:57pm

I've been just reading Fuji's writeup from a few years back on adjusting the startup text on an Apple IIe by changing some of the ROM's code. I wondered if a similar operation could be performed on a IIc, and if anyone might have some experience with that or any other modifications to a //c ROM. 

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Looking for S.A.M

Submitted by Epictronics on April 12, 2023 - 2:03pm

Hi guys,

I have been trying to find a working copy of S.A.M (Software Automatic Mouth)

After hours of searching the web I have only found 3 downloadable files that don't seem to work on my IIc.

Does anyone here know where I can find a working image file of the bootable disk?

Thanks!

 

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Apple pascal poster, remade

Submitted by danamania on April 11, 2023 - 7:31am

It's been a while since I've been around the fritter :). I figure this is the most likely forum here for this. Over the long weekend I dove into this recreation of the 1979 apple pascal poster. I aimed to keep the slightly hand-drawn feel to it.

The PDF is at the size I found mentioned on an auction of the original, and will print nicely at any local print shop, likely. It's an illustrator-editable pdf, as well as an svg, all text outlined. Do with it what you need, and enjoy!

 

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Apple II

Apple II+ motherboard power connector

Submitted by hdbluzman on April 8, 2023 - 2:44pm

Does anyone know what pin-to-pin resistance readings should be at the Apple II+ motherboard power connector? I'm trying to resurrect an old computer that hasn't been powered on in several years. It does not boot properly now. Thanks!

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Apple II

trying to debug an Apple II europlus

Submitted by guibrush on April 8, 2023 - 12:48pm

Hi, I'm trying to debug my II Europlus with only 48k ram. I have a Booti and tried to run some disk images with the apple resseler test disk on them, but all images I found required 64k of ram. I'm pretty sure than one or more memory chip are bad, as I got the information that the chip 7fff-000 (01) is bad when running this simple test from the monitor:

 

C050 C053 C054 C057 N 265:FF N 266<265.BFFEM 266<265.BFFEV 265:0 N 266<265.BFFEM 266<265.BFFEV 34:14 

my problem it that I have absolutelly no idea how to locate the bad chip with this information.

 

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Apple II

80 Column/RAM board issues - Help Please

Submitted by Ronin47 on April 4, 2023 - 4:51am

I have an Apple IIe P.A.L, board number 870-0073A dated 1982. Its also marked B607-0664.

I am having some problems with 80 character mode in that if I type in PR#3 it goes into 80 column mode, but after about 10 minutes the machine becomes unstable and I get on screen graphics corruption, or missing columns (Every other one) and from time to time the card just become unavailable.

It seems to be thermal as powering off for a short while allows everything to work as normal again, even if only for 10 minutes.

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Apple II

Apple IIe + Z80 Softcard : IN & OUT Z80 statement

Submitted by Wawavoun on April 3, 2023 - 11:01am

Hello,

My question is almost in the subject.

I want to run some assembly code on a Z80 located in a Microsoft Softcard.

This code include IN and OUT statement followed by a 8 bits address. I believe these instructions use the lower byte of the address bus and the ioreq pin of the Z80 to say to the hardware that this operation do not involve the memory but some special io devices.

On the Microsoft Softcard a quick look at the schematic show the ioreq pin is not wired... So I think IN and OUT instructions has no chance to work. Can you confirm ?

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