Derek S. Nickel

First Name:Derek S.
Last Name:Nickel
Last Change:2017-08-13
Number of Files:9 (148th most prolific)
Number of Downloads:13,947 (753rd most downloaded)

HP 48SX Internals   (details) 48 ENG   27KB
Describes some of the internals of the HP 48SX calculator from a variety of sources, including the HP-71B Internal Design Specifications, ROM analysis and other posted information. Its intended audience is people with a good understanding of the basic HP 48SX who want to explore the internals of the HP 48SX. Goes into depth about object types and important memory addresses.
By Derek S. Nickel. 2017/06/11

HP48 Machine Language Starter Kit   (details) 48 ENG   153KB
Set of documentation and example code that would have been good for a beginning 48SX machine language programmer back in 1991.
By Joe Ervin, Jake Schwartz, and Derek S. Nickel. 2017/06/11

Link Tables   (details) 48 ENG   2KB
Explains how link tables work for locating XLIB numbers.
By Derek S. Nickel. 2017/08/13

Reverse   (details) 48 ENG   2KB/1KB
Fast assembly language routine which reverses strings, along with its slower User RPL equivalent.
By Derek S. Nickel. 2017/06/28

Saturn Instruction Set   (details) 48 ENG   9KB
Comprehensively describes the Saturn instruction set.
By Derek S. Nickel. 2008/08/17

To Hex   (details) 48 ENG   3KB/1KB
Converts objects to their hexadecimal representation and vice versa.
By Derek S. Nickel. 2017/08/03

Voyager 1.07   (details) 48 ENG   190KB
Voyager is a DOS program that will allow the user to interactively disassemble the contents of the HP 48SX ROM and other HP 48SX programs. This directory also contains several related documents: HP 48SX Internals, Voyager Reference Manual and Saturn Instruction Set.
By Derek S. Nickel. 1997/09/06

Voyager Source Code 1.07   (details) 48 ENG   40KB
Source code for the Voyager development program.
By Derek S. Nickel. 1997/09/06

Voyager Source Code (Turbo C) 1.07   (details) 48 ENG   40KB
Source code for the Voyager development program, ported to Turbo C.
By Derek S. Nickel and Barry Anderson. 2017/08/12

Part of the HP Calculator Archive,
Copyright 1997-2017 Eric Rechlin.