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==== Table of Contents ====

[[#modified_rc2014_bus_for_crc65|Modified RC2014 Bus for CRC65]]

[[#introduction|Introduction]]

[[#signal_definiton|Signal Definiton]]

====== Modified RC2014 Bus for CRC65 ======

===== Introduction =====

CRC65 has an expansion bus that's based on RC2014 bus. It is a single-row, 39-pin, right-angle male connector. The addresses, data and power signals are same as RC2014, many of the control signals are also the same. The different signals are 6502-specific.

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=9b6a68&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/crc65/crc65_modified_rc2014bus.jpg|{{https://www.retrobrewcomputers.org/lib/exe/fetch.php?w=600&h=351&tok=bc5539&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fcrc65%2Fcrc65_modified_rc2014bus.jpg?600x351|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_crc65_crc65_modified_rc2014bus.jpg}}]]

===== Signal Definiton =====

^Pin Number^Signal Name                                                         ^
|1         |Address 15, A15                                                     |
|2         |Address 15, A14                                                     |
|3         |Address 15, A13                                                     |
|4         |Address 15, A12                                                     |
|5         |Address 15, A11                                                     |
|6         |Address 15, A10                                                     |
|7         |Address 15, A9                                                      |
|8         |Address 15, A8                                                      |
|9         |Address 15, A7                                                      |
|10        |Address 15, A6                                                      |
|11        |Address 15, A5                                                      |
|12        |Address 15, A4                                                      |
|13        |Address 15, A3                                                      |
|14        |Address 15, A2                                                      |
|15        |Address 15, A1                                                      |
|16        |Address 15, A0                                                      |
|17        |Ground                                                              |
|18        |VCC                                                                 |
|19        |Spare                                                               |
|20        |Reset                                                               |
|21        |PHI2 Clock                                                          |
|22        |Interrupt, IRQ                                                      |
|23        |Non-maskable interrupt, NMI                                         |
|24        |Read/write, RWB                                                     |
|25        |RDY                                                                 |
|26        |<del>SYNC</del> EXIO (note: require engineering change for Rev0 PCB)|
|27        |Data, D0                                                            |
|28        |Data, D1                                                            |
|29        |Data, D2                                                            |
|30        |Data, D3                                                            |
|31        |Data, D4                                                            |
|32        |Data, D5                                                            |
|33        |Data, D6                                                            |
|34        |Data, D7                                                            |

\\