Saturn 128 memory expansion card. 128k ram for Apple II. New (small) version. Links Forum with author post about this card. Firmware for GAL20V8B Another one implementation saturn 128 compatible card Original manual of saturn 128 card Photos my card
DISK II emulator for APPLE II from Nishido. He is close site with english translation because many people copy gerber and schematic and sell this board. But japanise version still available. Connector description top with marker here 1 3 5 7 09 11 13 15 17 19 2 4 6 8 10 12 14 16 18 20 1:GND 2:STEP0 4:STEP1 6:STEP2 8:STEP3 10:WRITE REQUEST' 12:+5V 14:DRIVE ENABLE' 16:READ PULSE 18:WRITE SIGNAL...
Short tips&hints additional. To check and download available macos x distribution you can use softwareupdate command list available images: softwareupdate --list-full-installers download selected image: softwareupdate --fetch-full-installer --full-installer-version 15.0.1 To make bootable flash disk: /Applications/Install\ macOS\ xxxxx.app/Contents/Resources/createinstallmedia --volume /Volumes/YYYY where xxxxx - macos system code name (i.e. Sequoia / Sonoma / Ventura / etc) and YYYYY - you flash drive current name You must have root privileges to run this command.
I run both machines. First - recap, on first macintosh I also change dc-dc for nubus. On this computer 2 legs on EGRET was rotted, but it works. Main problem was in PSU and VRAM simm. PSU also need recap and full review. Anyway now it both works! Bingo! Recap guide for motherboard and for PSU
Some time ago I was order Macintosh LC as working computer … Yes, it doen’t work, so I start to repair it… (Unsuccess yet). But I found donor to finish repairing, so story continued, but still not finish… Read
Overview After I order Apple-1 PCB and start solder I understand I want to have Apple-2 too. It’s a bit interesting computer from usage point of view. Also this is result of Mike Willegal work. Most important complexity in this board is EPROM chips. Now its possible to use only original one. Anyway I will try to solder and run this board. BOM list in xls Photos My computer (progress) up
Apple 1 ACI (Apple Cassette Interface). This is also result of reverse by Mike Willegal. Great work and looks close to original one. I was solder this pcb. BOM list in xls Schematic aci ACI prom Assembly manual from Mike Willegal in english Apple 1 cassette interface manual, original scan Photos Original front back My pcb up up
I was order new born Apple 1 PCB. This is result of hard work by Mike Willegal, who re-create this pcb. Actually its looks very close to original one. I will try to solder and run this board. BOM list in xls Assembly manual from Mike Willegal in english User manual Apple basic, original scan Operation manual for Apple-1, original scan Many information about building, in russian Photos Original boards up...
Overview I was order Macintosh LC. It was sold as worked computer, but based on photo I was see some capacitors was leaked. I hope it doesn’t affect and plan to repair it after, but … computer doesn’t work when I plug power and turn it on. No worries, I say, lets clean motherboard and recap it. Oh life is bad game, plans and reality sometimes completely different. After cleaning motherboard I found some legs on EGRET and 8L08A dc-dc convertor for PDS bus was absent due to capacitors acid....
Computer was presented to me by Egor Tsilenko. Many thanks! Photos up