Computers + Peripherals

Apple /// Reset Logic & Apple II Emulation Flaws

Submitted by MacFly on October 8, 2023 - 4:18pm

AppleIII_Reset_Schematics.png

I recently ported software from the Apple II to Apple III and encountered an interesting topic. It's a corner case, but in my opinion a typical example. It shows how the Apple III design was sometimes (maybe unnecessarily) complicated. And how features introduced Apple II compatibility issues.

Tags: 
6502 APPLE III NMI RESET

A few tests for a non-booting Disk II controller

Submitted by S.Elliott on April 1, 2023 - 12:23am
A collection of simple (simplistic) tests for diagnosing a non-booting Disk II or A2 disk controller:
  • Monitor commands to test 6 of the 8 data latches in the 9334 chip
  • Monitor commands to load just one sector, then beep and break
  • Attach an LED to troubleshoot individual latches Q0 through Q3
  • Use a flashlight to "candle" circuit traces
  • Use wood or bamboo to scrape debris off the circuit board
Tags: 
troubleshooting

Apple's new products from "Peek Performance" - My thoughts

Submitted by k24a1 on March 8, 2022 - 2:14pm

Honestly, I haven't tuned in until the Mac Studio got announced. However, I would like to share my thoughts on the new products.

Tags: 
Apple
Mac
m1

Apple Intelligent Keyboard Prototype

Submitted by Tom Owad on January 29, 2021 - 6:50pm

intelligent-keyboard.jpg

Content Type: 
Computers
Computer Type: 
Apple II
Macintosh, 68K
Manufacturer: 
Apple

Ventless Rev 0 Apple II

Submitted by Tom Owad on May 30, 2019 - 1:49am

Woz designed the Apple II, but Steve Jobs clearly had a hand in designing the case. His obsession with design and hatred of fans dates back to the very beginning. No computer in the Apple II line had a fan. The very first didn't even have vents.

Due to issues with overheating, this design was soon modifed to have vents. Early buyers had the option of upgrading to the vented case, and many did. Others, such as the owner of the computer pictured below, added fans.

These are some of the best photos I've ever seen of a ventless, Revision 0 Apple II. Thank you to hamandhifi for giving me permission to share them. This computer sold on 5/30/19 for $11,236.90. 

There is a discussion of the computer here: Apple II rev.0 serial A2S1-0203 up for auction

 

More below the break.

Content Type: 
Computers
Computer Type: 
Apple II
Manufacturer: 
Apple

Achim Breidenbach's High Res Apple I Pictures

Submitted by Tom Owad on September 5, 2018 - 3:16pm

Desktop Pictures

Content Type: 
Computers
Computer Type: 
Apple I

Twentieth Anniversary Macintosh

Submitted by orchard on September 13, 2004 - 10:44am

TAM Spartacus

How do you mark with prestige and elegance the 20th birthday of the most influential and important company in the history of the microcomputer? For 20 years, Apple had the will and motivation to create a new design rather than a new computer. The designers, with Jonathan Ive at their head describe the principal design features as beautiful, refined, with few cables and efficiency, and most important, wicked fast.

Content Type: 
Computers
Computer Type: 
Power Macintosh

eMate 300

Submitted by orchard on September 11, 2004 - 10:08am

eMate (Apple's Photo)
The eMate 300 was released in the midst of Apple's tumultuous economic period, with Gil Amelio at the helm, and little more than red ink flowing from the 'doomed' company. In an attempt to reach Apple's traditional base, a Newton for education was developed.

Content Type: 
Computers
Computer Type: 
Newton
Manufacturer: 
Apple

Epilogue

Submitted by Joe on August 14, 2004 - 4:55pm

EE1


The total coast for this system, motherboard and extra 4k of Ram memory and the cassette interface board, if you paid the full price for this Apple1 system it would have cost $861.66 and it had no graphics. The Apple 1 computer outputted 40 characters per line to the screen. This also did not include a Keyboard, the two A.C. power transformers needed, the tape cassette recorder and a case to put your Apple computer system into.

Content Type: 
Documents
Computers

Apple 1 For Sale

Submitted by Joe on August 14, 2004 - 4:49pm

FS1
Complete and Apple I for sale

Content Type: 
Documents
Computers
Computer Type: 
Apple I

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