exxos's H5 A3 Build

[exxos]

So it seems to have that odd fault where I can format a floppy, access it, save desktop.inf, all fine, but it refuses to read any other floppies despite being created on the same floppy drive on the H4 :shrug:

EDIT:

OK the above was single sided format.. I tried double sided and it completed the format kinda... :shrug: and can't access floppy A: again :roll:

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[exxos]

The only difference between SS and DS seems to be a register in the 1772.. I have continuity checked a lot of the lines between the DMA, 1772, checked various lines of activity, re-solder the floppy port, change the cable, change the floppy drive, change the 1772 and DMA.. I cannot really think of anything else to do..

Won't have any time today to work on it, but I think we will just have to see if someone else has the same problem to see if it's a actual problem on the design or just my board.. But the whole DMA circuit was copied from the hate for and is tried and tested anyway, so I don't see what could really go wrong.

[stephen_usher]

Not more crossed wires I hope.

[exxos]

Not more crossed wires I hope.

Nothing changed on the DMA circuit other than adding the inverter, but that was tested on the H4 DMA bodge boards. otherwise its the same circuit.

[Steve]

@exxos Have you done the MANDATORY FIXES? LOL ;D

[PhilC]

@Steve its obviously a Bad DMA :lol:

[exxos]

Only just got home, though sound SIDE0_SEL from the YM chip isn't pulsing high and low like it does on the H4.. I've changed the YM chip.. so its not that.. so need to dig more...

[exxos]

Taa'Daaa

I win I win I win

:cheer: :cheer: :cheer: :girldance: :girldance: :girldance:

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[stephen_usher]

What was the problem?

[Icky]

Taa'Daaa

I win I win I win

Give that man a booby prize :twisted: