BrainfuckPC Relay Computer

I installed connectors to all cables.  So I'm ready to interconnect BFPC blocks together

RC version of instruction set for BrainfuckPC relay computer. It support all +-<>[]., brainfuck instructions and a little bit more. Just because hardware allow me to do it.

Brainfuck mappings:

• ADD = +
• SUB = -
• ADA = >
• ADS = <
• JZP = [
• JNZ = ]
• IO.IN = ,
• IO.OUT = .

All instructions are 16-bit wide.

• Bits 15, 14, 13, 12 - define instruction class
• Bit 12 - Signed bit for Adder commands. Value of this bit extended to 13-15 bits when sending to adder input B;
• Bits 11-0 - contain least 12-bit of signed integer. Master 4 bits generates automatically: 0 for positive and 1 for negative values.

• AP - Address pointer Register
• IP - Instruction pointer register
• *AP - Current Data cell
• CIN - Console input
• COUT - console output

Cables for blocks interconnection are partially done.

25 cables 16-bit width. Using single-line connectors was the greatest fault in device construction planning. Double-line 2x10 connections would be more useful.

Power line +5V is placed and I started powering up the blocks. 

Cut cables. Each cable is 20-bit width, bu I need 16-bit only. Need to install connectors on the one side and measured each cable.

Installed all cables support (printed them from ABS plastic). As you can see, second register block returned to it's place. It's done.

Next step is to connect VCC and GND to blocks and cut 16-pin cables. 

For +5V power delivery 2mm^2 copper wire is used. Second wire (GND) - chassis.

Vacations gone so I have to return to work on the project :)

Current task - to wire-wrap CMD/TMP register block. It's 80% done. Just need to add VCC and WR lines (but want to go to sleep...)

This block contain 3 registers:

16-bit TMP register for Adder A-input

12-bit BIAS register for Adder B-input (4 MSB bit are extended with sign)

4-bit CMD register for Sequencer input. 

We load data from Memory to TMP register and load 16-bit width code instructions to BIAS+CMD register.

Last modules for BrainfuckPC are Done!

Overall modules count: 157pcs.

Relays:

RES55 - 439pcs

RES64 - 75pcs

RES43 - 64pcs

Current number of relays - 578pcs

I'm started with placing all equipment to BrainfuckPC chassis. And it's beautiful.

Chassis painting Done and I'm ready to start assembly.