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==== Table of Contents ====

[[#prototype_crc65_a_frugal_6502-based_sbc|Prototype CRC65, A Frugal 6502-based SBC]]

[[#introduction|Introduction]]

[[#features|Features]]

====== Prototype CRC65, A Frugal 6502-based SBC ======

===== Introduction =====

CRC65 stands for **C**PLD_**R**AM_**C**Fdisk_**65**02. It is a simple yet powerful 6502-based single board computer. Discussion about CRC65 development can be found here:

http://forum.6502.org/viewtopic.php?f=10&t=6440

This page describes the first prototype of CRC65. The production CRC65 homepage is [[builderpages:plasmo:crc65|here]].

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=ad71fd&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/protorc3/crc65_proto/dsc_62640109.jpg|{{https://www.retrobrewcomputers.org/lib/exe/fetch.php?w=600&h=387&tok=3b8a2e&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotorc3%2Fcrc65_proto%2Fdsc_62640109.jpg?600x387|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_protorc3_crc65_proto_dsc_62640109.jpg}}]]

===== Features =====

W65C02 operating at 14.7MHz

CY7C109 RAM provides 58K of RAM space

Altera EPM7064S CPLD with the following features

64-byte boot ROM

Double-buffered serial receiver at 115200 N81

Software bit-bang transmitter operating at 115200 N81

Compact Flash interface

I2C interface

RAM decode

Bus-connected IDE44 interface.

Prototyped with ProtoRC3

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=cdfeed&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotorc3%2Fcrc65_proto%2Fcrc65_prototype_mockup_annotated.jpg|{{https://www.retrobrewcomputers.org/lib/exe/fetch.php?w=500&h=265&tok=42e886&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fprotorc3%2Fcrc65_proto%2Fcrc65_prototype_mockup_annotated.jpg?500x265|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_protorc3_crc65_proto_crc65_prototype_mockup_annotated.jpg}}]]