Icky - Progress

wietze · Post by **wietze** » 07 Oct 2018 17:29

I've been following the whole board development in general and this thread in particular pretty much since the start; impressive work all around.

I am burning with one question; could test some demo footage with fullscreen/spectrum 512; Im REALLY interested to see how much of a perfect compatibility this new board would give!

Kind regards,
Wietze

stephen_usher · Post by **stephen_usher** » 07 Oct 2018 17:48

wietze wrote: 07 Oct 2018 17:29 I've been following the whole board development in general and this thread in particular pretty much since the start; impressive work all around.

I am burning with one question; could test some demo footage with fullscreen/spectrum 512; Im REALLY interested to see how much of a perfect compatibility this new board would give!

Kind regards,
Wietze

As it's using all the original chips, just replacing the integration between them, there will be no difference.

Post by **Icky** » 07 Oct 2018 18:59

stephen_usher wrote: 07 Oct 2018 17:48 As it's using all the original chips, just replacing the integration between them, there will be no difference.

I can confirm it behaves as per original STFM during demos. As Stephen mentions the machine is a modern integration with original chips.

Post by **Icky** » 07 Oct 2018 19:24

Icky wrote: 07 Oct 2018 09:59
exxos wrote: 07 Oct 2018 09:54 I've actually had the problem recently with when hard drives were connected the floppy drive would stop working.. was a bugger to find..but...

https://www.exxosforum.co.uk/forum/viewt ... 015&p=7620
I'll give that patch a go to see if it fixes the problem. Need to test Megafile on STFM though first to make sure it is behaving correctly

Tried this patch on the board with no change. Still not seeing floppy drives when HDD plugged in

Post by **exxos** » 07 Oct 2018 21:19

Icky wrote: 07 Oct 2018 19:24 Tried this patch on the board with no change. Still not seeing floppy drives when HDD plugged in

Bummer, so will have to diagnose that one when my board comes then.

Post by **Icky** » 07 Oct 2018 21:39

exxos wrote: 07 Oct 2018 21:19
Icky wrote: 07 Oct 2018 19:24 Tried this patch on the board with no change. Still not seeing floppy drives when HDD plugged in
Bummer, so will have to diagnose that one when my board comes then.

Still no sign of your board?

Post by **exxos** » 07 Oct 2018 21:47

Icky wrote: 07 Oct 2018 21:39 Still no sign of your board?

Got a email saying its almost done.. hopefully tomorrow...

rpineau · Post by **rpineau** » 07 Oct 2018 22:32

exxos wrote: 07 Oct 2018 21:19
Icky wrote: 07 Oct 2018 19:24 Tried this patch on the board with no change. Still not seeing floppy drives when HDD plugged in
Bummer, so will have to diagnose that one when my board comes then.

Can you guys check the pull-up on /DRQ , just in case ;)
Pin 1 of U51 -> pull-up -> 5v
I also check the STE and MSTE schematic and the DMA port is fully buffered there as opposed to the STFM. Might be something to add on the next rev.
Also the INT pins from the DMA and FDC are going through some 74LS02 to be combined into one int signal to the MFP instead of being hard wired together on the STFM .. could help make things more stable (in the future).

Post by **exxos** » 07 Oct 2018 22:39

Pull up is in RP1.

Post by **Icky** » 07 Oct 2018 22:50

exxos wrote: 07 Oct 2018 22:39Pull up is in RP1.

Yep - just measured 1K

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