Search found 721 matches

by troed
Sun Sep 16, 2018 8:07 pm
Forum: FPGA DEVELOPMENT
Topic: Project: HDMI/DVI out for STFM
Replies: 666
Views: 320694

Re: Project: HDMI/DVI out for STFM

Finally, this mystery has been solved. A clue was indeed in why sometimes after reset the videomode wasn't correct. The resets were caused by TOS detecting a change to mono. A bootsector that immediately disables the TOS reset vector at $46e (resolution change vector) stops the 520ST (where I did th...
by troed
Sun Sep 16, 2018 12:25 pm
Forum: FPGA DEVELOPMENT
Topic: Project: HDMI/DVI out for STFM
Replies: 666
Views: 320694

Re: Project: HDMI/DVI out for STFM

Wow. It absolutely is. Connected up an HxC slim to my beautiful internal floppy header in the 520ST and booted ... Closure. No resets at all. So previously I had looked at /MONOMON with my LA to see if it triggered - since one of the few ways an ST resets cleanly is when TOS detects a mono monitor h...
by troed
Sun Sep 16, 2018 12:11 pm
Forum: FPGA DEVELOPMENT
Topic: Project: HDMI/DVI out for STFM
Replies: 666
Views: 320694

Re: Project: HDMI/DVI out for STFM

I'm not less confused. Fatter GND and resistor on VSYNC made no difference. So just to rule out the possibility that the FPGA is fine and _both_ my doubleST and 520ST are weird I pulled up a non-recapped pure stock-as-stock-can-be 1040 STF and put it in there. Booting without a disk in the drive, or...
by troed
Sat Sep 15, 2018 10:24 am
Forum: ALPHA DEVELOPMENT INFO
Topic: PSU bracket remake ?
Replies: 91
Views: 53669

Re: PSU bracket remake ?

When you're done I'll print this as well (Ultimake 2) and verify with one of many PSUs laying around here. I have M3 nuts and bolts already.

Good remake of the original metal design into something more suitable for 3D printing!
by troed
Fri Sep 14, 2018 11:23 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: PCB Build - Progress - Post your Pics here :-)
Replies: 135
Views: 64035

Re: PCB Build - Progress - Post your Pics here :-)

exxos wrote: Fri Sep 14, 2018 10:36 pm ? Wire 12V to what ? Nothing actually uses 12V on the board other than the 12V pull up on the RGB port. (not sure if that's needed for scart switching)
The ubeswitch uses the 12V pin on the monitor out.
by troed
Fri Sep 14, 2018 10:30 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: PCB Build - Progress - Post your Pics here :-)
Replies: 135
Views: 64035

Re: PCB Build - Progress - Post your Pics here :-)

Forgottenmyname wrote: Fri Sep 14, 2018 10:26 pm I've got a ubeswitch connected.
Ok :) Then you need to manually patch it if you don't have a 12V source (I think ube wrote how in one of these threads). And without ram maybe that current usage would actually be correct.
by troed
Fri Sep 14, 2018 10:18 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: PCB Build - Progress - Post your Pics here :-)
Replies: 135
Views: 64035

Re: PCB Build - Progress - Post your Pics here :-)

I've plugged the board into my bench power supply, just the two five volt and two 0 volt rails and recorded a current use of 440ma. None of the components are even warm to touch after being on for 5 mins but no video as yet. I presume the lack of video is due to a lack of 12v going to the board? wh...
by troed
Tue Sep 11, 2018 6:11 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: SUGGESTIONS
Replies: 48
Views: 46443

Re: SUGGESTIONS

I guess patched code could check the register to see if a write fails or something.. Then it knows if its running on the new MMU or not... or just separate patched versions of software :shrug: Yeah that's no problem. Demos can easily check to see if the functionality is there, and new TOS images co...
by troed
Tue Sep 11, 2018 5:28 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: SUGGESTIONS
Replies: 48
Views: 46443

Re: SUGGESTIONS

I can only really think that the CPU will have to write start and end address of block to clear into a register. Then the MMU will clear that block, and likely send DTACK to CPU when clear is finished. Exactly. That wouldn't break any existing code (bar any miswrites to that previously not used reg...
by troed
Tue Sep 11, 2018 5:03 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: SUGGESTIONS
Replies: 48
Views: 46443

Re: SUGGESTIONS

exxos wrote: Tue Sep 11, 2018 4:22 pmI don't know if that would break raster stuff still with a faster screen clear ?
It would have to be addressed in a new way to not break old code.

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