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-# 16-bit CPU design doc
-
-## Features
-16-bit data
-16-bit address width
-16-bit instruction width
-16-bit control word
-Minimal instruction set computer (MISC)
-4-bit opcodes
-Memory mapped I/O
-
-instruction format
-xxxx xxxx xxxx xxxx - xxxx xxxx xxxx xxxx
-
-General purpose registers:
-
-    RA (0) .. RH (7)
-
-Expansion port that connects directly to the main bus
-
-Default addressing mode: indirect absolute (addresses are stored in registers and point to a complete address). Some instructions use PC-relative addressing.
-
-## Operations
-
-TODO rewrite bit about operations
-
-ALU flags:
-- C = carry bit
-- O = overflow bit
-- Z = zero bit
-- S = sign bit
-
-Interrupt lines: ???