MP-09 Processor Board

The MP-09 processor, board is intended for use in Southwest Technical Products Corporation or, similar computer systems using the SS-50 bus system. It consists of the MC6809 processor, ROM monitor, memory management system and buffering circuits. The board requires a 7 to 9 Volt unregulated DC voltage at approximately 1.0 Amp. The MP-09 may be used to replace 6800 processor boards in most any SWTPC 6800 computer system.

The MP-09 was introduced in March 1979 for $175 kit and $195 assembled. It was soon upgraded to the MP-09A. (There were layout problems in the first MP-09 boards.) The MP-09B was introduced in 1980. Some of the differences are shown in Application Note 127.

MP-09B Processor Board

Board Photo (56K JPG)

MP-09 Board Photo High Resolution (522K JPG)

MP-09A Board Photo High Resolution (488K JPG)

MP-09B Board Photo High Resolution (386K JPG)

Assembly Instructions (247K PDF)

Schematic Part 1 (409K JPG)

Schematic Part 2 (340K JPG)

AN-113 Configuring FLEX 2.6 for Computers with MP-B3 Motherboards (40K PDF)

AN-121 Hardware Modifications for the UNIFLEX and FLEX Operating Systems (1.5M PDF)

AN-125a Proper FLEX Disk Driver Operation (148K PDF)

AN-124 Operating the SWTPC S/09 Computer at 2 MHz (19K PDF)

AN-127 Modifying the MP-09A and MP-09 Processor Boards for 69/A and 69/K Computers (209K PDF)

AN-137 Proper Computer Operation with M-64 and M-256 Dynamic Memory Boards (5K PDF)

SBUG-E 6809 ROM Monitor User's Guide (44K PDF)

SBUG-E Source Code (37K TXT)

SBUG-E Listing (44K PDF)

SBUG 1.8 ROM in Motorola S1 format (5K TXT)

Source Code for Dallas Semiconductor DS1642 RAM and Real Time Clock

SWTPC 6809 Page
Michael Holley's SWTPC Collection Home Page
This page was last edited August 14, 2013