Search found 3406 matches

by exxos
Tue Oct 16, 2018 2:40 am
Forum: ALPHA USER BUILDS
Topic: PaulJ Progress
Replies: 63
Views: 951

Re: PaulJ Progress

:bravo:

Do you get any video noise like icky does ?
by exxos
Mon Oct 15, 2018 10:18 pm
Forum: STF REMAKE PROJECT
Topic: ALPHA MODIFICATIONS
Replies: 83
Views: 2046

Re: ALPHA MODIFICATIONS

1772 DMA BUS SHORT FIX This fix is partly classed as optional.. There will be no issue if just using floppy drive (That we currently know about). When the hard drive is attached, it could potentially damage the DMA & 1772 chips. It is also possible the hard drive or floppy drive could malfunction w...
by exxos
Mon Oct 15, 2018 10:10 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 13
Views: 173

Re: DMA port "update" ideas..

I thought Icky got floppy and DMA working without a bodge? Yes... Icky managed to get a blown DMA & 1772, this could happen due to the shorting of the DMA & 1772 databus.. so this fix will rule out and solve that issue. This will solve a issue which will likely bite someone in the ass at some point...
by exxos
Mon Oct 15, 2018 9:53 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 13
Views: 173

Re: DMA port "update" ideas..

Happy to order one from you with the other bits I need. +1 At this rate the STF Remake will be littered with piggy back boards. At least this is going to give you a good solid foundation for the BETA board. OK, will order 10 of the things.... Yeah Going to have stuff bodged all over the place on th...
by exxos
Mon Oct 15, 2018 8:45 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 13
Views: 173

Re: DMA port "update" ideas..

Here is the PCB file.. f3119fb02d8314a8bf43854323a01737.png 1772_BUFFER.zip OSH is $17.25 for 3... Little expensive I think particularly people only want one PCB... I could get a small batch of them done for my store, I could list them without signed for postage keep costs down.. This will of course...
by exxos
Mon Oct 15, 2018 6:38 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 13
Views: 173

Re: DMA port "update" ideas..

Looks right on paper :)

1772.png
1772.png (79.63 KiB) Viewed 84 times
transceiver-octal-bidireccional-tri-estado-74ls245.jpg
transceiver-octal-bidireccional-tri-estado-74ls245.jpg (41.68 KiB) Viewed 84 times
by exxos
Mon Oct 15, 2018 6:10 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 13
Views: 173

Re: DMA port "update" ideas..

Icky wrote:
Sun Oct 14, 2018 11:22 pm
So the reason I like the idea of having buffers on the DMA port too is based on the discussion you mentioned that some devices had them built in and others didn’t.
Yeah, I guess in the spirit of retro and fixing things, buffers should really be added..
by exxos
Mon Oct 15, 2018 4:13 pm
Forum: PSU (power supplies)
Topic: Future PSU designs
Replies: 98
Views: 7851

Re: Future PSU designs

Not much to see really here.. But managed to assemble 2 PCBs fully (aside from the transformers which should be here tomorrow).

The first PCB is undergoing testing :)

IMG_3299.JPG
IMG_3299.JPG (158.36 KiB) Viewed 31 times

EDIT:

22 transformers and 88 caps arrived with some other bits just :)
IMG_3300.JPG
IMG_3300.JPG (57.48 KiB) Viewed 26 times
by exxos
Mon Oct 15, 2018 4:03 pm
Forum: STF REMAKE PROJECT
Topic: Ordering the Alpha board
Replies: 139
Views: 4163

Re: Ordering the Alpha board

Your only missing the "chaos years" :P

I should finally be getting my board Thursday! :yay2: :yay2:
by exxos
Mon Oct 15, 2018 1:58 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: Discontinued & out of stock items 2018 round up
Replies: 0
Views: 59

Discontinued & out of stock items 2018 round up

Always a little sad to see the end of items, but sometimes it is just unavoidable. So I'm discontinuing the below items... FPU OVERCLOCK PCB 50MHz FPUOC.jpg https://www.exxoshost.co.uk/atari/last/storenew/#0074 These have been out of stock for a really long time. They have never been huge sellers so...