OSU8 Microprocessor

PJRC.COM Offline Archive, February 07, 2004
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OSU8 Microprocessor

Overview
CPU Programming
Hardware Info
Schematic

Xilinx Implementation
Address Decoder
OSU8 Core

Normal Size
Large Size
8-Bit Data ALU
16-Bit Addr ALU
Control State Machine
State Register
Bus Control
Accumulator
B Register
Status Bits
Operand Register
Program Counter
Stack Pointer

Register
2:1 Mux

P1 Pointer
P2 Pointer
16-Bit Equals
Temp Register
8-Bit Zero
Buffers

Full Hierarchy Index

Implementation
Download Files

Stack Pointer Register

This is the 16-bit register that holds OSU8's Stack Pointer. Either of two sources can load the register, depending on the state of SLEB, and the upper and lower 8-bit may be separately enabled by ENL and ENH.

Schematic Drawing

OSU8: Simple 8-Bit Microprocessor Design; Paul Stoffregen
http://www.pjrc.com/tech/osu8/sch/reg16b_sp.html
Last updated: November 28, 2003
Status: These pages are a work-in-progress
Comments, Suggestions: <paul@pjrc.com>

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Complete List of All OSU8 Schematics