exxos's Atari, Amiga & retro forum

Posted: **Mon Apr 19, 2021 9:33 am**

I understand now.

For Port C and SPI I think 1 jumper wire for SPI Clock might be needed as I can't find SPI CLK on Port C.
I will dig out docs, maybe it is on alternative pin configuration.

Posted: **Mon Apr 19, 2021 9:38 am**

arkadiusz.makarenko wrote: ↑Mon Apr 19, 2021 9:33 am I understand now.

For Port C and SPI I think 1 jumper wire for SPI Clock might be needed as I can't find SPI CLK on Port C.
I will dig out docs, maybe it is on alternative pin configuration.

A couple of patch wires will be fine.. This board has let me figure out all the nasty issues with clocks and understand how to do slot expanders. Its been a useful exercise. I'm betting not everthing is working but Knightmare and Monkey Acc work fine.

Posted: **Mon Apr 19, 2021 2:29 pm**

SPI2 can have MOSI on (transmit only mode) on Pin 9, 11 or PB15 (used by USB)
and CLK on Pin 42, 34 or 28.

Posted: **Mon Apr 19, 2021 5:55 pm**

arkadiusz.makarenko wrote: ↑Mon Apr 19, 2021 2:29 pm SPI2 can have MOSI on (transmit only mode) on Pin 9, 11 or PB15 (used by USB)
and CLK on Pin 42, 34 or 28.

9 is already connected so we can use that... do you have a preference for CLK? Also are there options for CS_N?

Posted: **Mon Apr 19, 2021 6:23 pm**

There is option for hardware NSS signal for Input/Output on pins 62, 56 or 33.

I guess default would be best as in the past there were minor issues with alternative configurations on some chips (most likely not anymore).

So SPI2 default pins would be this

Code: Select all

SPI2_MOSI PC1  pin9
SPI2_SCK PB10 pin28
SPI2_NSS PB12 pin 33

Posted: **Mon Apr 19, 2021 6:53 pm**

arkadiusz.makarenko wrote: ↑Mon Apr 19, 2021 6:23 pm There is option for hardware NSS signal for Input/Output on pins 62, 56 or 33.

I guess default would be best as in the past there were minor issues with alternative configurations on some chips (most likely not anymore).

So SPI2 default pins would be this
Code: Select all
SPI2_MOSI PC1  pin9
SPI2_SCK PB10 pin28
SPI2_NSS PB12 pin 33

Right we'll go with that .. the 4 "row scan pins" that you read as inputs can be on any of the other connected pins..

Posted: **Mon Apr 19, 2021 8:20 pm**

@arkadiusz.makarenko Do you have a spectrum / amstrad RGB scart cable? i've rewired the DIN plug i have to support that video pinout

Posted: **Mon Apr 19, 2021 9:45 pm**

I have full set of +2 cables, composite and RGBs.

Posted: **Mon Apr 19, 2021 10:06 pm**

arkadiusz.makarenko wrote: ↑Mon Apr 19, 2021 9:45 pm I have full set of +2 cables, composite and RGBs.

Sweet.. i'll post you build #2 of the TFMSeX before friday...

Posted: **Mon Apr 19, 2021 10:40 pm**

Next project is to get the MSX2 roms booting.

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