exxos's Atari, Amiga & retro forum

Hi,
I'm modding my STe with the "1.44 FLOPPY UPGRADE PCB V7.1" and I'm a bit confused with assembly documents for every versions except v7.1.

My pcb :


So I guess there is no more SIL array to solder as I can see smd 1k arrays in the middle of the pcb ?

A : D0 for floppy drive A. The pad should stay unsoldered and a wire goes to the floppy drive but where exactly on a Sony MPF920 ?
B : D1 for floppy drive B. Without any drive, pad should be bridged.
C : MCF, this Media Change Fix pad should stay unsoldered with Dual Tos (2.06)
D : P1 wired to W301 pad 1 (right square one)
E : P2 wired to W301 pad 2 (middle round one)

Third and last question, is there any precaution to follow if this pcb is used with your "FLOPPY CABLE FLIP KIT [0208]"

Thanks in adavance !

Astuck wrote: 10 Jan 2023 16:50 So I guess there is no more SIL array to solder as I can see smd 1k arrays in the middle of the pcb ?

Correct.

A : D0 for floppy drive A. The pad should stay unsoldered and a wire goes to the floppy drive but where exactly on a Sony MPF920 ?

5th picture down.
https://exxosforum.co.uk/atari/last/floppy/index.htm

B : D1 for floppy drive B. Without any drive, pad should be bridged.

Correct.

C : MCF, this Media Change Fix pad should stay unsoldered with Dual Tos (2.06)

Solder it.

I only kept it as "breakable" if someone had issues. But I never had any reports of issues with it enabled.

D : P1 wired to W301 pad 1 (right square one)
E : P2 wired to W301 pad 2 (middle round one)

Image on the "FITTING TO STE" section.
https://exxosforum.co.uk/atari/last/floppy/index.htm

Third and last question, is there any precaution to follow if this pcb is used with your "FLOPPY CABLE FLIP KIT [0208]"

None that I am aware of no.

Perfect !
Many thanks for these light fast answers.

Astuck wrote: 10 Jan 2023 16:50 Third and last question, is there any precaution to follow if this pcb is used with your "FLOPPY CABLE FLIP KIT [0208]"

Might be worth cutting the trace between the drive select pins on the floppy flip kit if you haven't already put it together.
Otherwise the drive will respond to both A: and B: requests.

You can see where in this post of mine
viewtopic.php?p=59423#p59423

DaveC wrote: 10 Jan 2023 20:31 Might be worth cutting the trace between the drive select pins on the floppy flip kit if you haven't already put it together.
Otherwise the drive will respond to both A: and B: requests.

You can see where in this post of mine
viewtopic.php?p=59423#p59423

I think STF is fine. Only 1 drive select on the internal.


Looking at the STe, looks like Atari wired both A&B to the internal connector :roll:

@DaveC
Thanks for the tip about STe, sadly the message arrived 2 hours after the flip floppy kit was assembled :?

Astuck wrote: 10 Jan 2023 22:41 @DaveC
Thanks for the tip about STe, sadly the message arrived 2 hours after unflip floppy kit was assembled :?

Just cut pin12 on the floppy drive connector and have done with it.

@exxos
OK for pin12.
Looking for the HD selec pad inside MPF920, I've just noticed that you may have forgotten to correct D0 SEL on this one :

It shouldn't matter if you're using the floppy flip, d0 and d1 have a trace between them on the drive connector side of the pcb as well.

I am also installing your HD FLOPPY MOD 7.1

The Sony MFP920-E I ordered from Exxos Store is a bit different than the photo.

Where to connect D0 on the drive ?

I will use a gotek as external drive, should I modify anything ?