Man that takes me back, I love that stuff, those were the days, when men were men (and had to be to lift a computer .I've written a few monitors over the years, even did one for the AVR not that long ago.______Rob
I cut my teeth on Z80 assembler and for years I've though of building a retro board with all my old favourites, CPU, PIO, SIO, CTC, etc. It would be a lot of fun but really, why bother...still the idea appeals all the same.______Rob
Same here, Z80 assembler is how I started out. I designed an all in one embedded board that I used in a few projects. Love the Z80 instruction set. I have written multiply and divide libraries too.
dnar, your pics have disappeared (courtesy of the recent forum upgrade I guess), any chance you can repost them?______Rob
Hi Guys,I have a similar romantic (as I just love those 70-ish things) aspiration to rebuild a SYM-1 (sorry guys, but 6502 is a grandparent of ARM ). It is a slightly later system than the S-100 bus & 8080 processors (ie one self contained board, good built in software, and plenty of I/O, sort of like an Arduino grand parent really). I have (re-)acquired a SYM-1 board courtesy the Internet and 2 of 32k by 8bit chips to fully populate the memory space. I also intend to use the Arduino products to emulate the audio cassette interface to the original board, as I no longer have a working cassette player/recorder (what a surprise!!). I am tempted to do the TTY interface as well through an Arduino Mega + touch screen etc. Using a modern FTDI chip I will having it with a a USB interface as well. However I am held up with a huge technological hurdle haha, that is 22pin two way connectors at 0.156" spacing to do my memory expansion etc(I have ordered them but they are on a "Slow Boat from China" somewhere). I love the challenge of then having my SYM-1 hand crafted assembler ending up on a 4Gig SD card courtesy Arduino technology.Great post...dnarCheers, Rob