Congratulations on getting your computer up and running. It's just a bit silly that the computer can only actually do what you burn into its EEPROM, and you can't communicate with it in
OMEN Alpha is a 8085-based single board computer with minimal hardware and serial interface. 32kB RAM, 32 kB EEPROM.
The simplest program will be the obligatory „flashing LED“. In truth, – we don't have many other ways to verify that the system is working, other than the aforementioned connection of resistors to the
The processor circuit itself, as we designed it in the last chapter, is of no use. Respectively - you can plug it in, connect the data bus via resistors (ca 10k) to ground
I'm preparing the sequel to my book, Sticks, Volts, Monochips. This time I'm going to cover the design of osmibit computers. The book should be published in 2019 again in the CZ.NIC
In all OMEN designs I suggested a jumper/switch, usually called WREN - WRite ENable, in the EEPROM wiring, and I also wrote that it should be wired so that the /WE input