Profile:

Code name: maruCc18 Architect: Tadashi SAITO (Cofabricator:Kenichi MATSUURA) Became operational:Friday, July 17, 1998 Type: pipelined RISC having 3 stages Instructions: three-operand format 16bit-instructions x 40

Special features:

Fully interlocked pipeline Internal interruption handling (overflow)

Machine organization:

Registers: 8bit General purpose registers x 5 Logic units: 8 bit ALU x 1 Internal bus: 8 bit x 3 External bus: 16 bit instruction bus x 1, 8 bit data bus x 1 Main Store: 256Byte x 2 (instruction) + 256Byte (data) Maximum CPU frequency: 47.619MHz FPGA: Xilinx4010PG191(using 256 CLBs out of 400) TTL: TI 74 series IC x 26 I/O: 21 switches, 10 LEDs Application program: Euclidean algorithm

Days taken:

System design: 2 weeks (net: 5 days) CAD: 5 weeks (net: 20 days) Fabrication: 2 weeks (net: 6 man days) Debug: 3 weeks (net 6 days)

Comments:

It was tough days. But, when my machine worked, I was moved.

---

Computer Engineering Experiment City-1 in 1998 on Verilog HDL and FPGA

---

Microcomputer Design Educational Environment City-1

---