Dreamcast BIOS chips (MX29LV160TMC-90)

On the board I have, that via is connected to pin 10 (A1) on the boot ROM and pin 19 (A2) on the TSOP flash - which seems perfectly plausible, since the boot ROM is a 16 bit device with a A-1 line.

 

Or just use the schematic
Or just expose some of the copper of the trace and check each pin on IC502
or...

 

@ TriMesh

Thanks you very much, i'll try it out tomorrow !
seems like you have the right knowledge, so I might aske you another question.
which line from the Boot Rom must be connected, Pin numbers?

@ Bad_Ad84

which schematic do you mean?
traces are too tiny to meassure anything good with my multimeter, pins on the TSOP also..

 

OK, I just had another look, and it's slightly more complicated than I was thinking.

The damaged via in your photo had 3 connections coming from it - one went to pin 19 of the TSOP (through the via), one went to pin 10 of the boot ROM (the trace going down) and the final one goes to the power VR (the trace heading up) - but the via for this is underneath the TSOP.

A photo might make it easier.

You need to connect up all 3 points - if you link the point marked "Broken trace goes here" to "TSOP A2" on the back of the board and then jumper TSOP pin 19 to boot ROM pin 10, it should be right.

 

Big thanks to TriMesh !
I connected Pin 10 Boot Rom, to alternative point under the board, from there to another point that connects to pin 19 on TSOP and from there to the point under the TSOP that runs to the PowerVR.
I works again

 

hello, need to buy bios. please contact

 

PM'd

 

Please don't bump an old thread when the first post refers you to the new sales thread. Go there instead.

Closed.