Apple II

snacks

Submitted by mmphosis on June 17, 2022 - 2:07pm
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Apple II

Apple II power supply restoration?

Submitted by bus_error on June 16, 2022 - 1:27pm

Hi All,

 

I have an Apple II power supply with an early serial number that i'm looking to refurbish.. I know ReactiveMicro sells repair services ($90)..

 

1) Is it worth it?

2) Is this something I could generally do myself with a soldering iron and multimeter?

 

 

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Apple II

Copy/Backup GS/OS Boot Partition

Submitted by lee317 on June 15, 2022 - 2:17am

I have an Apple IIgs with an external SCSI hard drive. I'd like to backup that SCSI drive's boot partition with GS/OS System 6 onto a bootable Floppy Emu image.  Is there a special procedure for copying a System 6 boot disk? I am having issues. Here's what's happening ...

 

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Apple II

Apple II Arduino Uno and Shield interface

Submitted by profdc9 on June 14, 2022 - 11:20pm

Based on the feedback I got, I had an idea to derive an interface that can plug an Arduino Shield or an Arduino Uno into the Apple II bus using a 82C55 peripheral interface chip.  By soldering stackable headers into the Apple II card, an Arduino Uno can be plugged into the back of the card, and shields can be plugged into the front of the card.  There are resistors between the 82C55 and the Arduino pins to protect the Apple II and allow the transactions to be inputs or outputs.  You can find the card at

 

http://www.github.com/profdc9/Apple2Shield

 

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Apple II

Apple iie booting up ProDOS crash?

Submitted by gmc on June 14, 2022 - 11:29am

Just got myself a Apple IIe off eBay which had a PSU issue. Repaired the PSU and computer is now booting. I've run the self diagostic test and all looks good.

I now thought I'd build myself the ProDOS ROM from https://github.com/tjboldt/ProDOS-ROM-Drive

I've written the GamesWithFirmware.po to a 27C801 and verified ok. Have also tested all the logic chips and double checked my soldering - all good.

When I bootup the computer ProDOS starts but them seem to crash, at least it looks like a crash to me.

 

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Apple II

The Dan ][ SD card disk controller

Submitted by profdc9 on June 12, 2022 - 11:57pm

Hello,

 

I have designed and built a Apple ][ card that can interface two SD cards as ProDOS block devices.  It uses very commonly available chips, and is based on the ATMEGA328P microcontroller and 82C55 peripheral interface.  It uses simple readily available parts to be easy to reproduce, now and into the future.   It can host ProDOS order block devices from either raw block device SD cards or from FAT filesystem formatted SD cards.  I also have planned interfacing the card to a Wiznet 5500 for Ethernet support.

 

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Apple II

Help with a elusive Disk ][ drive problem

Submitted by Jim K.NC on June 12, 2022 - 2:13am

I have a Disk ][ drive that I brought back from the dead.  It seemed to be stored in a moist area that was not conducive to it’s good health (cast aluminum oxidized, dirt, other tell tale signs).  After cleaning and lube, it started working again and i used it a couple times to read some disks.  Then it seemed to stop and there was no sign of the normal head banging when booted when hooked to Drive1 on the controller.  I opened it up, and recleaned the head rails/slide, removed all the grease, and changed the pressure slightly of the tab that rides in the track of the plastic cam. 

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Apple II

Apple 2 emulator for Linux

Submitted by maxpiz on June 10, 2022 - 6:23pm

I would like help finding and installing an Apple 2 emulator for Linux - more specifically, Ubuntu 22.04 lts

I may need very specific help, as I am far from being a programmer - I don't even know how to compile...

 

Regards,

 

maxpiz

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Apple II

Apple 2c possible "check disk drive" message causes

Submitted by maxpiz on June 10, 2022 - 6:18pm

 

When viewing the 4th screenshot at this auction link, what are some of your opinions as to the possible things wrong with this system...   Obviously it is likely a bad disk drive, but I thought that perhaps something else may also cause this on screen error message....

link is:  https://www.ebay.com/itm/325162751429

and again it is screenshot #4

or the item # for this is:

155028353618

 

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