File:Motorola 6800 Assembly Language.png

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Original file (1,013 × 1,613 pixels, file size: 129 KB, MIME type: image/png)

Captions

Captions

Assembly code

Summary

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Description

An assembly language listing for a Motorola 6800 8-bit microprocessor. This is a page from a "Monitor" program that communicates to a serial terminal connected to a MC6850 Asynchronous Communications Interface Adapter (ACIA). The routines here initialize the ACIA (INITA), read an ASCII character (INCH) an6800d read a hexadecimal digit (INHEX).

The first line of the INCH routine is located at hexadecimal memory address C010 and has the label INCH in the first text column. The instruction "LDA A ACIA" is a load accumulator A (opcode B6) from location 8004. (The symbol ACIA is defined as 8004 on a previous page.)

This program was used in a single board Motorola MC6802 system that was designed and built as a university project in 1980 by Michael Holley.
Date
Source Own work
Author Swtpc6800 en:User:Swtpc6800 Michael Holley
Other versions
  • 6802 MPU Proto Board
    6802 MPU Proto Board

Licensing

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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Brian Chandler Luckham

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current13:02, 1 June 2023Thumbnail for version as of 13:02, 1 June 20231,013 × 1,613 (129 KB)Phreneticc (talk | contribs)Recompress the original file with FileOptimizer in lossless compression mode.
01:06, 21 April 2012Thumbnail for version as of 01:06, 21 April 20121,013 × 1,613 (141 KB)Mahahahaneapneap (talk | contribs)Compressed
02:48, 30 May 2011Thumbnail for version as of 02:48, 30 May 20111,013 × 1,613 (322 KB)Swtpc6800 (talk | contribs)== {{int:filedesc}} == {{Information |Description= An assembly language listing for a Motorola 6800 microprocessor. This is a page from a "Monitor" program that communicates to a serial terminal connected to a MC6850 Asynchronous Communications Interface

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