By: GeneCooper
Image: GIGAmacro ⧉
Subject: Vintage Computer Federation ⧉
License: Copyright, All Rights Reserved

Uploaded: 27 May 2017
Last Updated: 28 Jul 2018

4.97 gigapixels
54,900 x 90,571 pixels
183.0 in X 301.9 in at 300dpi
6,056 pixels per inch

Made using 10,540 photos
20 rows | 17 columns | 31 stacks

The Apple II's PCB underwent several revisions as Steve Wozniak made modifications to it. The earliest version was known as Revision 0, and the first 6000 units shipped used it. Later revisions added a color killer circuit to prevent color fringing when the computer was in text mode, as well as modifications to improve the reliability of cassette I/O. Revision 0 Apple IIs powered up in an undefined mode and had garbage on screen, requiring the user to press Reset. This was eliminated on the later board revisions. Revision 0 Apple IIs could display only four colors, but Wozniak was later able to generate 16 in low-res mode. Original Apple IIs were designed to accommodate either 2104 (4kx1) DRAM or 4116 (16kx1) DRAM and had jumper switches to adjust the RAM size. The early Apple II+ models retained this feature, but after a drop in DRAM prices, Apple began shipping all machines with 48k and the jumpers were removed. (source Wikipedia)