builderpages:plasmo:68340:prototype [RetroBrew Computers Wiki]

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====== MC68340 Prototype ======

Created in early 2000.

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=6c1a6b&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/68340/dsc_78150226.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/68340/dsc_78150226.jpg?direct&600x873|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_68340_dsc_78150226.jpg}}]]

===== Introduction =====

MC68340 is a member of CPU32 family which are microcontrollers based on MC68000 core. I bought several tubes of surplus MC68340 20+ years ago and built up a prototype board to check it out and then forgot about it. My interest is rekindled by recent discussion about "[[https://forum.vcfed.org/index.php?threads/mc68340-cpu32-looking-for-the-answers.1251868/|mc68340-cpu32-looking-for-the-answers]]" and managed to find the 68340 prototype board. I've made further progress with the prototype adding a boot ROM, IO clock and serial port interface; I've ported a simple monitor and ported TUTOR v1.3 to the prototype board; and I've designed a pc board version. Before putting away the prototype board (like the last scene of "Raider of Lost Ark"), I'm documenting what I did with this prototype.

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=5f30a1&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/68340/proto68340_annotated_f.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/68340/proto68340_annotated_f.jpg?direct&600x430|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_68340_proto68340_annotated_f.jpg}}]]

{{:builderpages:plasmo:68340:proto68340_scm.pdf|Schematic}}

{{:builderpages:plasmo:68340:340bug_and_tutor.zip|340Bug and Tutor v1.3}}  in boot flash