NEDONAND-1

2 layer board of 3.39x1.40 inches (86.06x35.56 mm).
Shared on February 21st, 2016 04:25.

1st board for NEDONAND project

This is a 1-bit slice of NEDONAND ALU supporting shift right RRC (000), shift left RLC (001), NAND (010), XOR (011) and ADD (1xx) operations. Pins description:

1) GND - ground;
2) O0 - bit 0 of ALU operation;
3) O1 - bit 1 of ALU operation;
4) O2 - bit 2 of ALU operation (if it's "1" then O0 and O1 are ignored);
5) A - input bit A (always from accumulator);
6) B - input bit B (might be from register or number);
7) C - input bit C (carry);
8) H - higher bit for rotation right;
9) L - lower bit for rotation left;
10) COUT - carry out;
11) DOUT - data out;
12) VCC - power +5V.

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zxfixer3

2 layer board of 2.81x1.11 inches (71.40x28.19 mm).
Shared on February 3rd, 2014 06:47.

Fixer board for ZX-Spectrum +2A/+3

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