Post by zyga64 on 22. Jan 2020 at 21:36
on 22. Jan 2020 at 10:29:
W (You need to Login or Register to view media files and links) jest temat o rozszerzeniu V1 do 8MB.
Quote:
RaNGuN - szacunek za pięknie wykonaną robotę ! Jaka technika lutowania ?
Ponawiam prośbę - jak ktoś z Was ma Voodoo 1 z 4MB FBI to proszę o kontakt. 15minut z multimetrem, zero ryzyka dla karty, a chwała na lata 
W (You need to Login or Register to view media files and links) jest temat o rozszerzeniu V1 do 8MB.
Quote:
DIY guide:
From 2 to 4 Mb on the TMU
Stack RAM chips ontop those 4 allocated to the TMU and solder each pin to the same below except pin 14.
Connect pin 14 on all 4 piggybacked modules to pin 130 of the TMU through a 22-47 ohm resistor.
I only had at hand 100 ohm ones and used those and had no problem.
From 2 to 4 Mb on the FBI
Stack RAM chips ontop those 4 allocated to the FBI and solder each pin to the same below except pin 14.
Check with a multimeter where pin 14 on the original modules connect. You should have 2 of them linked to pin 124 of the FBI and the other 2 to pin 125.
For the chips piggybacked to those that are wired 124, connect pin 14 to pin 199 on the FBI.
For the chips piggybacked to those that are wired 125, connect pin 14 to pin 180 on the FBI.
Use 22-47 ohm resistors before FBI. I only had at hand 100 ohm ones and used those and had no problem.
From 2 to 4 Mb on the TMU
Stack RAM chips ontop those 4 allocated to the TMU and solder each pin to the same below except pin 14.
Connect pin 14 on all 4 piggybacked modules to pin 130 of the TMU through a 22-47 ohm resistor.
I only had at hand 100 ohm ones and used those and had no problem.
From 2 to 4 Mb on the FBI
Stack RAM chips ontop those 4 allocated to the FBI and solder each pin to the same below except pin 14.
Check with a multimeter where pin 14 on the original modules connect. You should have 2 of them linked to pin 124 of the FBI and the other 2 to pin 125.
For the chips piggybacked to those that are wired 124, connect pin 14 to pin 199 on the FBI.
For the chips piggybacked to those that are wired 125, connect pin 14 to pin 180 on the FBI.
Use 22-47 ohm resistors before FBI. I only had at hand 100 ohm ones and used those and had no problem.
RaNGuN - szacunek za pięknie wykonaną robotę ! Jaka technika lutowania ?