Intel 4004 system on breadboard, first succesful test run скачать в хорошем качестве

Intel 4004 system on breadboard, first succesful test run

My first succesful test run with Intel 4004 CPU, the world's first commercially available microprocessor. It's 4-bit, 15 V CPU, first made available in 1971 but this particular chip, which I bought from eBay, was made in 1980. Visit http://dangerousprototypes.com/forum/... to follow progress of this project. Dedicated website is planned and will be up soon at http://4004.eu . On the breadboard you can also see: ATtiny13V as dual phase clock generator, currently making about 630 kHz clock signal which is then shifted to 15 V levels by discrete transistors. Next to right is 7905 voltage regulator which creates 5 V rail for the support chips, including program memory. In the center is P4004 CPU with two P4002 320 bit RAMs, each has one 4-bit output port driving the red LEDs. Moving down there is D4265 4x 4-bit programmable I/O, currently unused. Next to the left is D4289 standard memory interface which provides I/O ports as well as controlling program memory instead of the usual 4001 ROMs. In the left corner you can see AT89S52 which is used as serially programmable, parallel output, Flash program memory for easier debugging and development. It can be programmed in system but only 5V power has to be present to avoid some power conflicts. This MCU doesn't run at all, it is constantly held in reset and basically is used in program verify mode to read out the program memory. The whole system uses 2 W of power, some of which is lost at the 7905 regulator but it's not that bad overall.