mardi 27 décembre 2011

Mike Has The Components

As I said in the previous message, I contacted Mike Willegal... HE HAS THE COMPONENTS!!!! WOW!!! GENIAL!!! :) :) :) ... sorry but I'm so happy :) :) :)

My concerns was about the MIMEO bare board! Without this printed circuit board (PCB), no Apple I. I also ordered the ROMs (Wike is so kind, he programmed them with the Apple I firmware). And I ordered some rare components and integrated circuits, see below:

- 4 x 1N4001 Diode
- 4 x 1n914 Diode
- 4 x A14F Diode
- 2 x 8T97 IC
- 2 x Intel/MMI 3601 256x4 prom
- 1 x Signetics 2513 char ROM
- 7 x Signetics 2504v shift reg
- 1 x Signetics 2519b
- 1 x DS0025C Two Phase MOS Clock Driver
- 16 x DRAM 4Kx1 (MOSTEK MK4096)
- 2 x 2400uF 25 Volt Cap SPRAGUE
- 1 x 5300uF 15 Volt cap SPRAGUE
- 1 x Crystal -14.3181 Mhz HC49/U
- 1 x LM323K heatsink
- 1 x LM323K +5V voltage regulator (3AMP)
- 1 x Board Edge Cinch 44 pin (.200 between row spacing)
- (other minor components)

I've decided not to order all the components because I don't want to turn this project into a simple kit assembly. I'll search the missing components on internet, mainly eBay I guess but not only. Several other sources for used components are available.

For the 74 serie TTL ICs, I'll buy them all new to limit problems during the first boot. Then, once the Apple I will be functional I'll search vintage ones and change them one by one. The transformers couldn't be purchased from Mike because in France the domestic voltage is 220V, not 110V. I'll buy new ones, compatible with the STANCOR originals.

Now I'm waiting for the shipement to arrive... :D

jeudi 22 décembre 2011

I Think I Found The Components

Today I found a solid way to start my project. An Apple enthusiast named Mike Willegal is selling components to make your own Apple I. He can provide absolutely everything: components (even rare vintage integrated circuits), programmed PROMS etc... He has even produced a set of ready-to-use printed boards that he designed himself.

This is a replica of the original Apple I printed board. Furthermore, even if the components are not all "vintage", they do have a vintage "style", especially with the three blue chemical SPRAGUE capacitors. They'll allow me to create a cool, stylish replica of the original Apple I, see below:

Mike Willegal calls his Apple I replica MIMEO. I like it because it's really close to the original. Compare the MIMEO replica to the hi-res scan of the original Apple I Ad:

Some integrated circuits like the 1x4K rams MOSTEK MK4096 are very hard to find. These elements are essential in order to create your own Apple I. Without them the computer cannot be realized. I'm going to contact Mike to see if all those components are available.

Site of Mike Willegal:
Mike Willegal's "Mimeo 1 Kit":

jeudi 15 décembre 2011

Welcome To My Apple I Blog

Since a couple of days, I had an idea about doing something useful... something extraodinary and remarkable : making myself an original Apple I replica. What a better way to learn micro-computing's bases than "re"building this kind of Legend, which is the Apple I?

Let's start with a piece of history. The Apple I was created and produced in 1976 by Steve Jobs and his associate Steve Wozniak. First product of Apple Computer Inc, the Apple I was sold at the price of $666.66. Though it was "the first Low Cost Microcomputre System", the Apple I was quite expensive for individuals. 200 computers were ordered and only the half of them were manufactured by "the two Steve". This machine was a pure hobbyist product, sold without keyboard, no screen and no storage device... however it was pretty wonderful =)

See below how it was advertised by the brand new Apple Computer Company. 8Kb RAM on a single board! Nowadays it could seem ridiculous, but nearly 40 years ago it was a real achievement:

At that time, it was a huge step for Computing History. A full computer on a single board for a very low price (compared to the ones which already existed). That was Jobs' vision : making the micro computing afordable for everyone. Well, this version was created for people having computing knowledge, known as "geeks" nowadays, but the concept was here. Jobs made a huge upgrade with the Apple II, which encountered the success we already know.

If I created this blog, it's because I really wanted to share my experience during the Apple I's assembly. Every steps, every details and every secrets will be shared with the visitors of this blog.

I do hope my work will help people wishing to make their own Apple I.