<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 21 Sep 2015, at 2:33 pm, <a href="mailto:rsdio@audiobanshee.com" class="">rsdio@audiobanshee.com</a> wrote:</div><br class="Apple-interchange-newline"><div class="">Tim,<br class=""><br class="">I might not be able to beat that, but here goes: My first processor was the 6502, on a PCB that my uncle and his engineering compatriots had manufactured as a non-commercial Apple II clone. Since all of the chips in the Apple were off-the-shelf until the Apple //c and Apple //e, these guys just did their own layout from the schematic that Apple provided at the time, and socketed everything. That computer, built by hand in the early eighties, is still running today (I use it to burn vintage EPROMs). It had 4 separate power supplies for the +/-5V and +/-12V. The case and keyboard were separate, from surplus sources, and most "interface" cables were soldered to avoid failure of connectors.<br class=""><br class="">Before that, my uncle hand-wire-wrapped an entire Apple II on huge breadboards, but it only lasted a few years. The PCB was an attempt to make something that would last longer than wire-wrapping.<br class=""><br class="">Brian<br class=""><br class="">p.s. As folks may know, the Apple II system ROM had a disassembler, a line-oriented assembler, and even the ability to step through live code one assembly instruction at a time with display of the register changes after each. Great way to learn, and you didn't even need to buy an "emulator" and figure out how to wire it up.<br class=""><br class="">_______________________________________________<br class="">Synth-diy mailing list<br class=""><a href="mailto:Synth-diy@dropmix.xs4all.nl" class="">Synth-diy@dropmix.xs4all.nl</a><br class="">http://dropmix.xs4all.nl/mailman/listinfo/synth-diy<br class=""><br class=""></div></blockquote></div><br class=""><div class="">Hi Brian,</div><div class="">have a certain nostalgia for the Apple][. A while back I found this: <a href="http://www.cs.columbia.edu/~sedwards/apple2fpga/" class="">http://www.cs.columbia.edu/~sedwards/apple2fpga/</a></div><div class=""><br class=""></div><div class="">I ported it to a Digilent Spartan 3 board. I’ve added off board sound, clock and SD card. Works and sounds just like the original. Only downside is the SD card is read only. Makes playing Zork difficult, you die so frequently and can’t save your progress.</div><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Steve</div></body></html>