pinout wrong on yamaha CX5M wiki page?

By grobda

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19-05-2022, 17:36

was looking at this image of the yamaha cx5m expansion bus port;

and it didn't look right, so I checked my motherboard and the pin shown as pin 1 is pin 50 and the pin shown as pin 49 is pin 2.

with the connector as seen on the motherboard, 2x50 way connectors can be wired straight through and a cart can be inserted 'face up', as pictured on the wiki it would be 'face down'.... am I missing something? dont want to take any risks!

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By grobda

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19-05-2022, 17:38

By grobda

Supporter (8)

grobda's picture

20-05-2022, 17:56

scoped the edge connector from the cartridge slot and im right, pic is wrong
(https://www.msx.org/wiki/Yamaha_Expansion_Bus_Connector)

any mod able to correct the wiki? probably not the best thing to have info here that may result in someone plugging something in upside down.

got 2 female 50-way connectors and wired them straight through and it works with the cartridge facing up.

https://www.ebay.co.uk/itm/384852209305 if anyoens interested, ok price (1/2 that of mouser) and they arrived in under 24 hrs.

By gdx

Enlighted (5500)

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21-05-2022, 09:16

Fixed, thank you. I note that 44 & 46 pins are not connected. Can you tell if there are also odd pins that are not connected?

By grobda

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21-05-2022, 10:15

odd pins are all connected;

image is still wrong, corrected below;