QNX 1.2

QNX is a compact Unix-like real-time operating system that was originally designed for the IBM PC and later used in embedded devices. The versions here are for IBM PC compatibles.



Screenshots

Release notes

This version contains copy protection. Because of this, QNX 1.2 can access hard drives, but can not normally be booted directly from a hard drive.

Protection type: Mis-numbered sector on track 39 head 1.

Unprotect:

The protection can be bypassed by modifying qnx12_boot.img in a hex editor.

Patch byte at 0x004a5a9, change from 0x74 to 0xEB

0x74 is a JZ instruction 0xEB is an unconditional JMP.

Note: qnx12_dosfsys_ has some bad sectors, but are in unused space. This seems to be an extra copy but differs from the original.

There is more information about this dump and getting it to boot from a hard drive here: https://virtuallyfun.com/wordpress/2020/

You can try it via a PCjs emulator here: https://hawk.ro/qnx12_pcjs/

Wanted: Manuals

Product type
OS
Vendor
Quantum Software Systems Ltd.
Release date
1983
Minimum CPU
8088
User interface
Text
Platform
Unix
Download count
24 (1 for release)

Downloads

Download name Version Language Architecture File size Downloads
QNX 1.2 (1983) (5.25-360k) 1.2 English 59.39MB 1

Comments

Comments by