Layouts for for the five boards needed to build a SCELBI 8 H are near final. I’ve done all the design checking using my software as well as cross checking with schematics and I’ve sent gerber files to an online fab house design checker. I’m also getting quotes for pricing.
Just to give you an idea of how much work this has been, I’ve gone through the following approximate number of revisions of each board.
CPU – 81 revisions – this was the first board I started on, so some basic SCELBI things were figured out while doing the work for this board
DBB – 39 revisions
INPUT – 34 revisions
1KSRAM – 35 revisions
Front Panel – 16 revisions – most basic board, by far
The grand total number of layout revisions I’ve made since I started in earnest in October of 2011 is over 200.
I’ve also been working on the backplane, but it is not quite ready. The SCELBI 8H can be built without a backplane by hand wiring, and I’m likely to build my prototype initially that way, but getting a backplane made sooner rather than later, is not out of the question.
Here is a picture of Curtis’s hardwired 8H (image provided by Curtis)