Apple II

Apple II clock circuit question...

Submitted by jeff d on June 11, 2024 - 2:56pm

Looking at the II clock circuit because I'm not seeing a clock on a 79 II motherboard. At first I thought it was a problem with the crystal because I was only seeing a high output from Q2.

 

Looking at the SAMS Compufact Apple II / IIPlus I see the following information on the timing circuit, so I took some measurements:

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Replacing the battery in an Apple IIGS

Submitted by Austin_iigs on June 9, 2024 - 1:43am

So I keep on seeing guides and warnings stating that I should replace the battery on my IIGS. However, I am often seeing conflicting guides, some saying to use battery holders, some saying to solder them on, some saying to clip them on. Some say to use 3 AAA batteries, and others say to use the Tadiran TL-5101/S 1/2 AA battery.  What do you guys think?

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Apple II

GGLABS GZ/80S Apple II/IIgs 20MHz 512KB scheda PCPI CP/M - Zilog Z80

Submitted by pch on June 8, 2024 - 4:48pm

Hi all,

I have a GGLABS GZ/80S Apple II/IIgs 20MHz 512KB scheda PCPI CP/M - Zilog Z80 in slot #4 (Apple 2e), but I am getting the follor error: "can't find Z80 card"

 

is there anyone who can help me?

 

Grazie

Giuseppe

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Apple II

MG ROM++ for the Apple II/II+

Submitted by jeffmazur on June 8, 2024 - 1:54pm

First there was the ROM eX, then the ROM 4X and ROM 5X. All great improvements to the standard Apple System ROMs.

 

Now we have a version for the Apple II/II+ with ROMX+ !! Boot menu, coldboot, mini assembler and much more. See current status at theRomExchange.

 

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Apple II

What exactly is a Smartport please!

Submitted by Thlorian on June 8, 2024 - 12:34pm

Hello all - sorry for the noob question but I never understood what a smartport was/is for the Apple II computer line?  Is it a special hard drive technology that can be used on Apples?  Something else?  Tried searching online and found nothing -  thanks for any layman's terms explanations on this please!

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Apple II

Uthernet II - Buy in Europe (Italy preferred)

Submitted by pch on June 7, 2024 - 1:05pm

Hi all,

where can I buy the Uthernet II Card?

 

Grazie,

Giuseppe

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Apple II

ITT 2020 specific softwares

Submitted by Ben_Aveline on June 6, 2024 - 4:30am

Hello,

A few month ago I bought a nice ITT 2020 for cheap. It wasn't working. I cleaned the rom's leg (very corroded) and checked the whole ram (had to replace 6 bad chips).

Now it's back to life ! (except for the speaker, I still have to figure it out)

I managed to successfuly run a couple apple 2 softwares from a floppyEmu, but some other just freeze the computer or run but with graphic glitches.

I know there's been a few specific sofwares for the ITT 2020 but I can't manage to find a source for them, either as cassette dump or disk dump.

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Apple II

Apple IIGS Monitor for sale?

Submitted by Austin_iigs on June 5, 2024 - 7:44pm

It's super hard to find a working AppleColor RGB Monitor Model 6014 online for purchase, so I was wondering if anyone here would be willing to sell me their working monitor? Please don't tell me to get a VGA/HDMI convertor.

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Apple II

IIGS not resetting

Submitted by pcbishaf on June 3, 2024 - 4:24pm
pin 16 on ADB resets but does not show up on pin 49. Therefore none of the chips needing a reset.L startup.
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Apple II

Apple Graphics Tablet Interface Card in IIGS?

Submitted by old_hitech on June 2, 2024 - 9:59pm

Has anyone ever used an Apple Graphics Tablet and its interface card in an Apple IIGS? 

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