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/* Imported from Wayback Machine
   Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:plasmo:protor5:proto65:proto65r02
   Snapshot date: 2025-11-17
   Generator    : wayback-archiver
*/

==== Table of Contents ====

[[#proto65_rev02_a_6502_sbc_based_on_protor5|Proto65 Rev0.2, a 6502 SBC based on Protor5]]

[[#introduction|Introduction]]

[[#features|Features]]

[[#design_information|Design Information]]

[[#software|Software]]

[[#i2c_programs|I2C Programs]]

====== Proto65 Rev0.2, a 6502 SBC based on Protor5 ======

===== Introduction =====

This is the link to [[builderpages:plasmo:protor5:proto65:proto65r01|Proto65 rev0.1]], an older version without I2C bus.

This is the link to [[builderpages:plasmo:protor5:proto65:proto65r03|Proto65 rev0.3]], a standalone 6502 system with its own VGA and PS2 keyboard interface.

[[builderpages:plasmo:protor5|Protor5]] has a prototype area big enough for a processor, RAM and IDE44 interface. In this evolving project a 6502 CPU along with 128Kx8 RAM and an IDE interface are prototyped on a protor5 board.

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=04d2fe&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/protor5/proto65/proto65r02/gosper_glide_gun_proto65_128x64oled.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=600&h=522&tok=fc9128&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotor5%2Fproto65%2Fproto65r02%2Fgosper_glide_gun_proto65_128x64oled.jpg?600x522|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_protor5_proto65_proto65r02_gosper_glide_gun_proto65_128x64oled.jpg}}]]

===== Features =====

Based on protor5

EPM7192SQC160 CPLD

Reset supervisor

CPLD programming header

Reset supervisor

2.1mm X 5.5mm power jack

Oscillator socket for full and 1/2 size can

Serial port interface

Prototype area

6502 CPU testbed

128K 25-ns RAM based on CY7C109-25

IDE44 interface for CF disk

I2C Bus

40-pin expansion connector

===== Design Information =====

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r02:proto65_scm_rev02.pdf|Schematic]]

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r02:proto65_rev02_cpld_i2c_added.zip|CPLD design]]

==== Software ====

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r01:proto65_rev01_cpldbootrom_dual_boot.zip|Bootstrap ROM]] inside the CPLD

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r01:proto65_rev0_1_tinyload_release_1_1_21.zip|TinyLoad]], a 256-byte Intel Hex loader.

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r01:proto65_rev0_1_cfboot_1_1_21.zip|CFboot]], an utility program to write bootstrap program into the Master Boot Record of a CF or DOM disk. It also copy RAM image from 0xC000-0xEDFF into track 0, sector 0xE0-0xF7 of a disk

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r01:proto65_rev0_1_ehbasic_release_1_1_21.zip|EhBASIC]], Lee Davison's EhBASIC ported to Proto65

==== I2C Programs ====

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r02:proto65_i2c_game_of_life_128x64oled.zip|Conway's Game of Life]]. This program is initialized with Gosper Glide Gun. It drives the 128×64 OLED display over I2C bus.

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=04d2fe&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/protor5/proto65/proto65r02/gosper_glide_gun_proto65_128x64oled.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=400&h=348&tok=3f9fa5&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotor5%2Fproto65%2Fproto65r02%2Fgosper_glide_gun_proto65_128x64oled.jpg?400x348|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_protor5_proto65_proto65r02_gosper_glide_gun_proto65_128x64oled.jpg}}]]

A short video of the program running on [[https://www.youtube.com/watch?v=yb-iY51nxso|YouTube]].

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Display [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r02:proto65_i2c_ascii_table_128x64oled.zip|ASCII table]] on 128×64 OLED display

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=2d0cc0&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/protor5/proto65/proto65r02/ascii_table_on_oled_display_of_proto65_rev0_1.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=400&h=368&tok=e55742&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotor5%2Fproto65%2Fproto65r02%2Fascii_table_on_oled_display_of_proto65_rev0_1.jpg?400x368|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_protor5_proto65_proto65r02_ascii_table_on_oled_display_of_proto65_rev0_1.jpg}}]]

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Driving [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:protor5:proto65:proto65r02:proto65_i2c_driving_3xws2812b.zip|WS2812B addressable RGB LED]].

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=8525d9&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/protor5/proto65/proto65r02/0dsc_62500102.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=400&h=334&tok=36f93b&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotor5%2Fproto65%2Fproto65r02%2F0dsc_62500102.jpg?400x334|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_protor5_proto65_proto65r02_0dsc_62500102.jpg}}]]

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=4f87a4&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/protor5/proto65/proto65r02/ws2812b_annotated.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=300&h=196&tok=b25593&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotor5%2Fproto65%2Fproto65r02%2Fws2812b_annotated.jpg?300x196|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_protor5_proto65_proto65r02_ws2812b_annotated.jpg}}]]