I have been selling ROM adapters for the Commodore PET-2001 since 2009. Over these last five years I have been honing my design skills on my many different replacement electronic parts and through that process I have realized that my adapters are much in need of an update, so here it is. This new generation […]
Well, 6540rom.com is finally in the 21st century with a new name (D’Asaro Designs) and this new WordPress based website. The old website is no longer updated but it is still available at http://home.comcast.net/~medasaro/6540rom.com/home.html
I have updated the device list for the EPROM Programmer Universal Adapter. The new devices include ROMS 1818-2269 for the HP 8620C Sweep Oscillator. Get the updated list here.
When a (soon to be) customer asked on the HP Agilent Equipment Forum on yahoo for a dump of the custom control ROM chip (P/N 1818-2272A) in the HP 4261A LCR meter, I immediately recognized this as a perfect opportunity to demonstrate my EPROM Programmer Universal Adapter. Since the schematics for the 4261A are easily […]
I have updated the device list for the EPROM Programmer Universal Adapter. The new devices include ROMS 1818-2272A and 1818-2271A for the HP 4161A LCR meter. Get the updated list here. Note that this post was copied from the old 6540rom.com. The publication date has been modified to reflect the original posting date.
New Product! A programmer for the Motorola MCM2801 EEPROM is now availiable. Check it out here. Note that this post was copied from the old 6540rom.com. The publication date has been modified to reflect the original posting date.
I have updated the device list for the EPROM Programmer Universal Adapter. The new devices include ROMS MK31000, 2316A, 8316A, MCM68316A, AM9217, MK34000, 8316, 9316, 2616, MCM68316E, AM9218, and 1818-2270. Get the updated list here. Note that this post was copied from the old 6540rom.com. The publication date has been modified to reflect the original […]
I have succeeded in making reproduction HP 8601A output amplifier hybrids which match or exceed the performance of the original parts. For those curious about the process, read on! First a bit of background. The story really starts with another project, reproducing the HP 1820-0285 ICs for the 8007 series pulse generators (see my blog […]
The Akai VT-100, introduced in 1969, is one of the first ‘portable’ video recorders. It is unique in that it records on 1/4″ tape while most early recorders used 1/2″ tape. This, combined with very cleaver packaging and highly integrated (for the day) electronics allowed it to be smaller and lighter then the competition. However, […]
Well friends, I have another test equipment repair story to share, this one the most advanced that I have done to date. However, let me apologise in advance for the length of this posting. The story begins in 2007 when I, as a freshman at UW, bought a broken HP 8007A pulse generator on eBay […]