Computers + Peripherals

Apple /// Reset Logic & Apple II Emulation Flaws

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.

A few tests for a non-booting Disk II controller

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

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

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

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Apple Intelligent Keyboard Prototype

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Ventless Rev 0 Apple II

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.

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Achim Breidenbach's High Res Apple I Pictures

Desktop Pictures

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Twentieth Anniversary Macintosh

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.

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eMate 300

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.

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Epilogue

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.

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Apple 1 For Sale

FS1
Complete and Apple I for sale

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