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Problems with replica Apple II Rev. 0

Apple Fritter about 3 months ago

Hey guys!!! I got my project to create a replica of Apple II Rev. 0. Briefly what I used: power supply RQ-65B, board from the project of the respected Mike Willegal, Apple II +ROM board replacement, all components except what I have left after the assembly …

Apple 1 Power Supply - Accpetable Noise Level on -5 Volt DC Line

Apple Fritter about 4 months ago

I read this post:https://www.applefritt... added the fuses as suggested, with LED indictors as to the state of the fuse, proved very helpful.I was not too comformable about the design of the Apple 1 pow …

Apple 1 Boot Up Tests

Apple Fritter about 4 months ago

I'm still trying to get my Apple 1 Terminal Circuit working correclty.https://www.apple... Apple 1 does not complete Point 3 below, the "@" do not flash.I've ordered 74161, to replace the 74161A, use …
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Character Generator Tester

Apple Fritter about 4 months ago

AttachmentSize Schematics482.91 KB BOM112.39 KB Short movie25.82 MB Popular Electronics April 1974 article673.28 KB Last year I developed an ASCII Keyboard Tester (see https://www.applefritter.co... and https:/ …

Restauration of Sanyo VM 4209 & Sanyo VM 4092

Apple Fritter about 4 months ago

There is always something new to do. At the moment, I am getting my hands on Sanyos (VM 4209 and 4092) and want to bring them back to their former glory. I have managed to buy two of those each on eBay. Obviously, I will not restore the electrical parts o …
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Extra colors for hires graphics wanted ?

Apple Fritter about 4 months ago

As we all know, the Apple II can produce four colors in the HIRES mode, plus black and white (which are not "colors", but "shades". But what can I complain. Some computer folks are so uneducated that they pervert the meaning of words all the time. Such as …
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Uncle Bernie's "Replica 2e" (WW Prototype of an Apple IIe replica)

Apple Fritter about 4 months ago

Here is a first photo of my brand new "creature", which "came alive" this morning:  PDRM4505B.jpg  It's the wire wrapped prototype of an Apple IIe Replica (not a "clone" !) based on my IOU/MMU PLD substitutes which were al …

Why do people not buy the kit from Unicorn Electronics?

Apple Fritter about 4 months ago

Hi everyone, I've been looking into building my own apple-1 replica recently. Iv'e seen many fourms here with people looking for places to source chips, etc. I made my own spreadsheet, and totaling all the parts on the board gives me $719. The Unicorn part …
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For Sale: 1976 Apple-1 non-NTI Clone / Replica including ACI Interface and Datanetics Rev B Keyboard

Apple Fritter about 5 months ago

 Fully built, tested and functional Apple-1 Clone. Has 2nd video output mod and UncleBernie's reliability kit installed. I've built four Apple-1 clones and time has come to downsize my vintage computer collection and for someone else to enjoy this great p …
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WHAT TO DO WITH A DEAF/DUMB/DEAD APPLE-1 CPU SECTION

Apple Fritter about 5 months ago

Since my famous IC kits have sold out earlier this year, more and more Apple-1 builders are struggling with getting their APPLE-1 up and running. This post is meant to show a method to at least get a clue where the cuprit is which causes the Apple-1 not to …

What DIP Sockets To Use?

Apple Fritter about 6 months ago

Hi there, this is my first post here! I have been planning out an Apple-1 build for a little while and I have finally taken the dive with a Newton board and a Unicorn kit since I was too late for one of Uncle Bernie's. That is part of the reason I want to …
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Another little teaser...

Apple Fritter about 6 months ago

Because you guys love teasers, right? ;-)After my ASCII Keyboard Tester  I am more and more curious to understand the actual workings of the Apple-1 (and ][).Check out my latest contraption below, what will it do?Still working on it, I will add some more …
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Keycap new for Apple II keyboard

Apple Fritter about 6 months ago

 Hello, with the help of some friends, we are going to build an Apple II Replica.For the keyboard, I need the keycaps. I'm searching on Aliexpress but I can't find anything similar. Where can I buy them? I deduce that it is possible to buy them, since on …
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A warning about the "improved ACI" PCB confusion (or scams)

Apple Fritter about 6 months ago

Hi fans - it has been brought to my attention that some sellers on Ebay (and possibly elsewhere) advertise "improved" ACI PCBs for sale. Here is my WARNING to you: Do not confuse these "improved" ACI PCBs with the "Gen1" or "Gen2" improved ACI PCBs whic …
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Serial IEC Disk Drive Interface

Apple Fritter about 6 months ago

Dear Friends,it is with great pleasure that @nippur72 and I share with you our latest project (actually, more his effort than mine, I just soldered some component...). As some of you had guessed: this is a microSD Storage Card add-on module that allows yo …
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Uncle Bernie's Power Supply Mod

Apple Fritter about 7 months ago

Hello there, I have successfully beta tested Uncle Bernie's mod of the widely available Mean Well PT-65B/PT45B power supplies and will provide ready-to-use power supplies in the coming months. I also created a nice case which looks like this:  M …
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On the use of early-mid 1970s 4k x 1 DRAMs in the Apple-1

Apple Fritter about 8 months ago

Hi Fans, here is a report about the use of early-mid 1970s 4k x 1 DRAMs in the Apple-1. Most of us are using later 4k x 1 DRAMs produce towards the end of the 1970s or later, such as the ones I furnished with my famous kits (now sold out). Typical exampl …

ASCII Keyboard Tester PCB and Kit

VCFed about 8 months ago

Hi all, As discussed on Applefritter (see https://www.applefritter.co... I have finished the testing of my second revision of the ASCII Keyboard Tester. This tester can be used to test early parallel ASCII keyboards and has Ap …
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ASCII Keyboard Tester PCB and Kits

Apple Fritter about 8 months ago

AttachmentSize ASCIIKeyboardTester.pdf291.82 KB ascii-keyboard-tester-bom-r... KB Hi all,As a follow up of my post here (https://www.applefritter.c... I have finished the testing of my second revision of the …

Apple 1 Byte Shop Case & Datanetics Replica

VCFed about 8 months ago

Just finished a labor of love - 4 months of woodwork, soldering, and testing to get a hyperaccurate Byte Shop case, Datanetics keyboard, and Sanyo monitor. Highly recommend the process for anyone interested in the Apple 1! A few replication tips: - Foun …
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Review and Assembly Success of UncleBernie's Gen2 Improved ACI Board

Apple Fritter about 8 months ago

While taking a short break from troubleshooting my NewtonByte Prototype board, I've successfully completed the assembly of UncleBernie’s new Gen2 improved ACI board following the provided instructions. I didn't opt for the wave soldering look, keeping it …
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Need Help Troubleshooting Apple-1 (NewtonByte) Prototype Build

Apple Fritter about 9 months ago

I've (almost) finished assembling my Apple-1 NewtonByte Prototype. So far it passed the smoke test, but I ran into an issue when the 7400 (B1) is inserted; it's displaying 4 vertical columns with random garbage even after pressing clrscr/reset. With the 74 …

Rivintage not working!

Apple Fritter about 9 months ago

Hey guys! Nobody knows why the site rlvintage.tech is not working anymore? I tried to access it with and without VPN and failed every time. At one time I downloaded a small PDF file from there, maybe it will be useful for someone. https://www.apple... …

"Microchess 2" vs ChatGPT model 4

Apple Fritter about 10 months ago

Dear Friends,Just for fun, in this hot summer let's indulge ourselves with this semi-automatic chess match between "Microchess 2" (Apple-1 version) versus ChatGPT model 4 (yes, the expensive version!). You can find all the details and technicalities in th …
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Mods for "Mean Well" Switchmode Power Supplies to power unmodified Apple-1

Apple Fritter about 10 months ago

Dear Fans - My voltage increasing mods for all four candidate "Mean Well" switch mode power supplies ("SMPS") to power the unmodified Apple-1 announced in the old thread: https://www.applef... …