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==== Table of Contents ====

[[#mpu302_software_updates|MPU302 Software Updates]]

[[#cpm_bios_updates|CPM BIOS updates]]

[[#drive_a_updates|Drive A updates]]

[[#drive_b_updates|Drive B updates]]

[[#ambug_update|AMbug update]]

====== MPU302 Software Updates ======

The assembly language software were assembled with EASy68K tool, downloadable from [[http://www.easy68k.com|www.easy68k.com]]

The AMbug monitor, BIOS for CP/M-68k, drive A & B may be updated with the following procedures. Use the “send text file” command of your terminal program to upload. This program will auto-execute when file loading is finished. When program execution is completed it will display “S record execution completed” and prompt for more inputs.

===== CPM BIOS updates =====

There are 4 pieces of software for CPM updates: CPM15000, BIOS, utility software to clear memory, and flash programming software to copy CPM15000+BIOS into flash. The software can be uploaded individually as follow:

Upload [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:clrcpmmem.zip|clrCPMmem.s68]]. This program will auto-execute when file loading is finished. When program execution is completed it will display “S record execution completed” and prompt for more inputs. Please note that source & listing are also included in the zip file, only upload the file with .s68 extension

Upload [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:cpm15000.zip|CPM15000.s68]].

<del>Upload [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:mpubios_v2.zip|MPUBIOS_v2.s68]] (note: the source & listing are also included in the zip file, only upload the file with .s68 extension)</del>

Upload [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:mpubios_v2_1.zip|MPUBIOS_v2_1.s68]] ← this is 12/26/17 update replacing MPUBIOS_v2.S68

Upload [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:progcpm.zip|progCPM.s68]]. This program will auto-execute when file loading is finished. When program execution is completed it will display “S record execution completed” and prompt for more inputs.

<del>Alternatively a combined program, [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:progcpmall.zip|progCPMall.S68]], can be uploaded that will do all the above in one upload. This program will auto-execute when file loading is finished.</del>← Do not use this method.

===== Drive A updates =====

The available flash memories are split into two drives. Drive A contains the CP/M 68K v1.3 distribution files and drive B contains additional utility files. The drive images were created using cpmtools. The image is first loaded into MPU302 RAM and then programmed into flash memories. Drive A image is larger than MPU302 RAM, so it is split into two parts and uploaded/programmed in two separate steps.

Part 1 of drive A image. Upload the data file, CPMDSKA1.TXT, first. This is a large file and will take about 15 minutes to load. Next, upload the program file, progdska.s68. It will auto-execute when file loading is finished and copy part 1 of drive A into flash.

Part 2 of drive A image. Upload the data file, CPMDSKA2.TXT, first. This is a large file and will take about 15 minutes to load. Next, upload the program file, progdskb.s68. It will auto-execute when file loading is finished and copy part 2 of drive A into flash. This will complete the process of updating drive A.

===== Drive B updates =====

Drive B is 384K bytes in size and contains additional utilities for CP/M 68K. Upload the data file, [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:cpmdskb.txt|CPMDSKB.TXT]], first. This is a large file and will take about 10 minutes to load. Next, upload the program file, [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:progdskc.zip|progdskc.s68]]. It will auto-execute when file loading is finished and copy the drive B image into flash.

===== AMbug update =====

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:ambug207c.zip|Rev2.07c of AMbug]] simplifies the hardware handshakes. The file AMbug_prog_010.s68 is used to program primary monitor. The file AMbug_prog_040.s68 is used to program the backup monitor.

<del>[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mpu302:ambug207b.zip|Rev 2.07b of AMbug]]. The file AMbug_prog_010.s68 is used to program itself. The file AMbug_prog_040.s68 is used to program the backup monitor.</del>