A technical manual explaining how to extend Xtal BASIC 4.12 and 4.20 by adding new commands, functions, and assembler routines, with listings, examples, and code tables.

A comprehensive guide with programs, utilities and technical insights for the Tatung Einstein computer, compiled for enthusiasts and developers.

A 1984 technical listing of Z80 assembly source code for the Tatung Einstein’s MOS, covering disc read/write routines, graphics support, and character lookup tables for system-level programming.

A list|of legitimate machine calls to Einstein MOS 1.1. The calls (MCAL's) are executed on a RSTOS (Restart 8 instruction) followed by the function number (given in Hex).

A comprehensive guide to Einstein MOS machine calls, detailing functions, I/O operations, graphics, DOS compatibility, and boot processes for system programmers.

This document is a technical specification and assembly source code for the Tatung Einstein home computer’s operating system (MOS), detailing system routines, memory addresses, hardware control, and software functions.

This document details the assembly code for graphic support routines on the Tatung Einstein, including plotting points, drawing lines, shapes, and calculating screen positions.

Defines a standard image file format for CP/M systems to store and exchange disk, RAM or ROM images efficiently across devices.

A reference table mapping I/O port addresses (00–3F hex) to their hardware functions for a computer system, covering sound, video, storage and control interfaces.

A detailed guide to MOS DOS for the Tatung Micro System, covering monitor commands, disk operations, file management, utilities, and system programming.

A guide to using UN.COM, a tool designed to remove protection from Microsoft BASIC programs for recovery and debugging, with instructions and usage tips.

Instructions for using COM.COM on the Tatung Einstein to operate as a full-duplex RS232 terminal with baud rate setup, handshaking and echo mode controls.