exxos's Atari, Amiga & retro forum

exxos wrote: 18 Sep 2018 18:32

troed wrote: 18 Sep 2018 18:29 I'm confused by this being connected to BR.

Its a missing pull up resistor on BR & BGACK.

Yes. But both the pullup fixes are connected to BR, none of them to BGACK :)

Just put the /BGACK resistor in and now /BGACK, /BG & /BR all stay high, do i need to put that link to thepullups?

troed wrote: 18 Sep 2018 18:35 Yes. But both the pullup fixes are connected to BR, none of them to BGACK :)

oops... Updated the image...

Forgottenmyname wrote: 18 Sep 2018 18:38 Just put the /BGACK resistor in and now /BGACK, /BG & /BR all stay high, do i need to put that link to thepullups?

Check back as I updated a image just...

https://www.exxosforum.co.uk/forum/viewt ... =10#p10084

:headbang: :headbang: :headbang: :headbang:

Looks like I've missed a resistor pack off, as some more pins haven't go pull ups either.. will post fixes shortly....

5 RESISTOR FIX

<shame mode>

Fix for missing pull up resistors on, LDS,UDS,RW,AS,BGACK

5 highlighted pins, wire each to a 2.2K resistor, and wire the other ends to 5V (top end of C21 is 5V)


</shame mode>

Yes, I laughed, after I swore a few times :D

Here's the fix as a photo

Photo of using an extra SIL to provide the 5 extra pull-ups and using the SIL to also provide the BGACK PULL UP FIX

The other wire is the BR PULL UP FIX

White insulating tape to stop any shorts whilst the board is laid flat

Icky wrote: 19 Sep 2018 22:55 Photo of using an extra SIL to provide the 5 extra pull-ups and using the SIL to also provide the BGACK PULL UP FIX

Ooh, very nice! :bravo:

VIDEO SOCKET FIX

DO NOT SOLDER THE VIDEO SOCKET.

The pinout is wrong and we are working on solutions...

See the PCB fix option in topic below...

https://www.exxosforum.co.uk/forum/viewt ... =19&t=1211