I was wondering if anyone would be interested in participating in a group design project. I call it the Black Box. But, essentially, it's a parallel EEPROM programmer that uses a serial port to interface with a host computer.
The EEPROM can then be used to develop microprocessors. It is not code specific so it can program any processor, especially one having an 8-bit data bus and a 16-bit address bus. But at this point I don't see why it couldn't be used with any sized address or data bus.
I'm putting out this invitation to anyone willing to participate. I anticipate using 15 or 16 chips, but I think fewer are called for, given certain changes from what I have in mind.
I advocate The Black Box using a serial port to interface with a host. If you don't have one you can buy one that connects to a usb port for about $25. This ACIA then places addresses and data in registers according to the logic generated by a sequencer. The latches output to an address and data bus extenal to the black box and placed next to a small breadboard. You use solid telephone wires to connect the busses to the EEPROM stuck in the breadboard. The busses are just PIN sockets.
The black box can both read and write to the EEPROM. The need to write to it is obvious, but reading is necessary for verification by a small software program in the host.
Below is a general block diagram of the idea. If anyone is interested, let me know.
The EEPROM can then be used to develop microprocessors. It is not code specific so it can program any processor, especially one having an 8-bit data bus and a 16-bit address bus. But at this point I don't see why it couldn't be used with any sized address or data bus.
I'm putting out this invitation to anyone willing to participate. I anticipate using 15 or 16 chips, but I think fewer are called for, given certain changes from what I have in mind.
I advocate The Black Box using a serial port to interface with a host. If you don't have one you can buy one that connects to a usb port for about $25. This ACIA then places addresses and data in registers according to the logic generated by a sequencer. The latches output to an address and data bus extenal to the black box and placed next to a small breadboard. You use solid telephone wires to connect the busses to the EEPROM stuck in the breadboard. The busses are just PIN sockets.
The black box can both read and write to the EEPROM. The need to write to it is obvious, but reading is necessary for verification by a small software program in the host.
Below is a general block diagram of the idea. If anyone is interested, let me know.