Jupiter Floating Point Accelerator

This document describes the Jupiter Floating Point Accelerator (FPA), an add-on for the Jupiter CPU designed to accelerate specific KC10 instructions, including floating-point math, double-word moves, and integer multiplication. It details the interaction between the FPA, the EBOX, and the IBOX, covering data and flags injection, instruction handling (including direct, XCT'd, and immediate mode instructions), and the complex timing requirements for various memory and AC storage operations. The document concludes with a signal interface count and revision information.