The End of Things
After predicting the end of the DB-19 connector supply for over a year, it’s finally happened. I recently sent my last stockpile of new-old-stock DB-19s to the board shop for assembly of more Floppy Emus. I have two left that…
Year 2016
USB to ADB – Multitasking Two Interfaces
It’s time for a new progress report on my USB to ADB converter project! My goal is to design a simple PIC32 device that enables USB keyboards and mice to be used with vintage ADB-based Macintosh and Apple IIgs computers.…
Crikey! USPS International Shipping Costs
Running a mail-order business gives me many opportunities to think about the cost of shipping. I’ve just made a change to the BMOW store that enables small, lightweight packages sent within the USA to be shipped by USPS First Class…
USB to ADB Progress – Good News and Bad News
I’m still chugging away slowly on this USB to ADB input translator concept, using a PIC32 starter kit. First the good news: the ADB end of things is pretty much finished. I’ve designed a demo that creates a phantom mouse…
Understanding the ADB Service Request Signal
In the comments section of yesterday’s post, I mentioned a concern about ADB’s service request (SRQ) mechanism. A device requesting service can pull the ADB bus low at a certain point midway through another ADB transaction, which is called an…
Apple ADB Traffic Sniffing
I’m continuing work on the USB to ADB input adapter for vintage Macintosh and Apple IIgs computers, and I now have an ADB traffic sniffer that’s more-or-less working. It doesn’t (yet) send any ADB traffic, but it displays ADB traffic…
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