qsic-verilog's Introduction

QSIC - QBUS Storage and I/O Card

The QSIC is a QBUS card with an FPGA and SD cards that emulates the old DEC disk controllers and drives. A companion indicator panel is also available for those who want the blinkenlights.

This project has been split into separate repositories so that it works better with git. This repository primarily holds the Verilog code that runs on the FPGAs. It also holds the documentation and the paper I wrote on bus arbitration. Finally, just because there’s no more work being done on it, I’ve left the KiCad schematic for the wire-wrapped prototype here as well.

So, directories you might care about are:

board-wirewrap	KiCad design for the wire-wrap prototype board
documentation	Programming Manual for the QSIC/USIC
papers	A paper on QBUS and Unibus arbitration
verilog	The FPGA code to implement the QSIC

These directories, I’ll probably make go away at some point but, for now, I’ll leave them be.

board-prototype	KiCad design for a prototype board with 8641 bus transceivers (old idea)
board-qsic	KiCad design for the QSIC hardware
board-smt	KiCad design where I’ve been experimenting with discrete bus drivers
indicator-panel	This directory is obsolete as the indicator panel has been moved to its own project

Other QSIC-related repositories.

QSIC	The QSIC board
USIC	The USIC board
Indicator Panel	Indicator Panel PCBs and graphics inlays
Software	The software that runs on the embedded soft processor in the QSIC/USIC (not yet started)

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