Updated Device List for the EPROM Programmer Universal Adapter
This update adds support for TI’s entire 24 and 28 series of PROM devices. Get the updated list here.
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Building a Punch to Make Properly Perforated 828 Film
I have been interested in film photography and vintage cameras ever since I took Bill Kuhns B&W photography class at Nathan Hale High School in Seattle, WA. I enjoyed the class so much that took it all four years of high school and by the end I was maintaining pretty much all the photographic equipment. […]
New – The D’Asaro Designs Shapeways store and Commodore PET Keyboard parts!
I am proud to announce the opening of the all new D’Asaro Designs Shapeways store! By partnering with Shapeways to gain access to their amazing array of 3D printing technology we will be making available a wide array of replacement mechanical parts for various legacy electronics equipment. As a first such product, we are now […]
Updated Device List for the EPROM Programmer Universal Adapter
Two in a row! This update adds support for the 2564 ROM, adds support for 2332 ROMs with an alternate pinout, notes that the 2364 may have mask programmable chip select lines, and makes some of the wording throughout the document clearer and easier to understand. Thanks again to a helpful customer for suggesting these […]
Updated Device List for the EPROM Programmer Universal Adapter
Thanks to a helpful customer, I have updated the device list for the EPROM Programmer Universal Adapter. This update marks the 2364 data as being verified and corrects the 2332 data to reflect the fact that the chip select lines are mask-programmable and thus may be either active high or active low. Get the updated […]
Adapters to replace MPS-6550 RAM chips in the Commodore PET 2001 are finally here!
I have been selling adapter to replace the MPS-6540 ROMs in the Commodore PET-2001 since 2009, but until now, there has not been a solution for the equally scarce MPS-6550 RAM chips. This product finally solves this problem once and for all by making a simple way to replace a 6550 RAM chip with a […]
A Guide on troubleshooting the Commodore PET 2001
I have written and posted a guide describing some of my techniques for troubleshooting faulty Commodore PET 2001 computers. If you have a sick PET, learn how to fix it here.
Troubleshooting Common Problems with the Commodore PET 2001
As a seller of replacement parts for the original Commodore PET 2001, I am frequently asked questions like “My PET won’t boot. Will your (fill in product here) fix it?”. I usually answer these questions are some troubleshooting steps / tips that the potential customer can use to try to narrow down the problem, but […]
New products and Updated Device List for the EPROM Programmer Universal Adapter
Two new products! First, a replacement ingaurd ROM for the HP 3455A multimeter is now available. This is a drop-in replacement for the original custom HP ROM. Order here. Second, Batten and Allen DIP edge clip pins are now available for sale. These special pins allow a PCB to be made to plug securely into […]
Updated Device List for the EPROM Programmer Universal Adapter
I have updated the device list for the EPROM Programmer Universal Adapter. This update includes an important correction for the 1818-2269 ROM used in the HP 8620C sweep oscillator and includes new ROMs for the HP 436A power meter. Get the updated list here.