1.44 floppy mod Assembly guide?

[LarryL]

No, not at all..
Pins 19/20 of the Yamaha are the bottom left two pins.

It starts with pin 1 on the upper left (where you see the small notch indicating this), goes down lower left side to pin 20, then lower right side pin 21, then up to pin 40
All DIP chips are numbered like this!

Regardless how this is shown in schematics

[Darklord]

Okay, thanks. So it should be:

Yamaha YM-2149 (close view)03.jpg

[sporniket]

Yes, better.

[Darklord]

Thanks everyone. :)

[Darklord]

Wow, that was quick - package is here already. 4 days shipping time from
the UK to Kentucky in the US? That's pretty amazing.

Now, I've got some (more) soldering to do.

(this public service announcement causes women, children and pets
to run screaming into the night)... :lol:

[Darklord]

Just wanted to double-check and make sure I have the orientation of the chip
and 1.44 HD floppy mod board correct.

Thanks.

1.44 HD Floppy Mod Orientation.JPG

[Darklord]

BTW, do the extra "ground to motherboard" (black) wires in the earlier versions
still need to be done with v7.x?

Thanks.

[exxos]

Just wanted to double-check and make sure I have the orientation of the chip
and 1.44 HD floppy mod board correct.

Orientation looks correct by your previous 1772 image.

[exxos]

BTW, do the extra "ground to motherboard" (black) wires in the earlier versions
still need to be done with v7.x?

Don't know what wire your referring to... There's only the DS pads to solder to force 720k mode for internal or external drives.. and the 2 wires which goto the YM.

[Darklord]

Orientation looks correct by your previous 1772 image.

Thanks. :)