Where is J4 in the new board, & how many pins does it have?

Chat about anything CX16 related that doesn't fit elsewhere
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BruceRMcF
Posts: 224
Joined: Sat Jan 07, 2023 10:33 pm

Where is J4 in the new board, & how many pins does it have?

Post by BruceRMcF »

I have been going off of the documentation to look at using the "spare" pins on VIA#1 on the J4 jumper for access to internal SPI bus daughterboards if either the User Port VIA for relatively fast SPI is not available, or else is being dedicated to something else. This ranges from an SPI UART to a CPM card.

But I don't see anything that looks like the J4 in the documentation on the board shown in the video at Texelec.

Does anyone know if (1) they have reduced the number of available J4 pins or (2) the J4 jumper is sitting somewhere out of sight, or (3) they have scratched the J4 jumper and the docs are just not up to date with the change.
the_seb
Posts: 19
Joined: Mon Feb 14, 2022 3:25 pm

Re: Where is J4 in the new board, & how many pins does it have?

Post by the_seb »

i see it on the picture on the texelec web site betwenn te cpu and the 65c22 via chip.
j4 "extra". on the video it's unreadable but there is also pins at the same place
tim1724
Posts: 7
Joined: Thu Jun 22, 2023 5:50 pm

Re: Where is J4 in the new board, & how many pins does it have?

Post by tim1724 »

Here it is on my board (DEV0080) right between the CPU and the System VIA:
IMG_1816.jpeg
IMG_1816.jpeg (2.79 MiB) Viewed 5662 times
And the silkscreening on the underside of the board:
IMG_1817.jpeg
IMG_1817.jpeg (2.03 MiB) Viewed 5662 times
BruceRMcF
Posts: 224
Joined: Sat Jan 07, 2023 10:33 pm

Re: Where is J4 in the new board, & how many pins does it have?

Post by BruceRMcF »

Thanks! I could not see six pins in the video, so that's a relief.
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