Search found 3571 matches

by exxos
Tue Oct 23, 2018 6:02 pm
Forum: STF REMAKE PROJECT
Topic: Mongrel edition motherboard thoughts
Replies: 3
Views: 29

Re: Mongrel edition motherboard thoughts

Well I would do my best to help and would likely invest in a board if you made it. :thumbup: Is it worth using the smt combined blitter too? May free up space. It's a interesting thought, I don't know the ins and outs of that chip. The problem is it cannot be used in the proposed overclock mod I wa...
by exxos
Tue Oct 23, 2018 2:16 pm
Forum: STF REMAKE PROJECT
Topic: Mongrel edition motherboard thoughts
Replies: 3
Views: 29

Mongrel edition motherboard thoughts

I have a lot of SMT GLUE & MMU currently.. I want to try and make a adapter PCB so they can be used in place of PLCC chips ultimately.. Because probably won't be particularly cheap, but as there is no real alternative currently then it is the only way to supply replacement chips.. But I was thinking...
by exxos
Tue Oct 23, 2018 11:07 am
Forum: ALPHA USER BUILDS
Topic: Icky - Progress
Replies: 565
Views: 7587

Re: Icky - Progress

So looks like its a no go :( I had to laugh at this statement - "The goods have been tested and tested but the quality is bad" Do they have a Blitter quality performance tester at there disposal :D Yeah, thats the kind of message I had with some other chips... https://www.exxoshost.co.uk/forum/view...
by exxos
Tue Oct 23, 2018 12:04 am
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 54
Views: 552

Re: DMA port "update" ideas..

Icky wrote:
Tue Oct 23, 2018 12:00 am
It does seem to be temperamental on 16MHz
Could be interfacing issues to the MMU, or the DMA might not just cope with it. Up the voltage a bit, see if it helps :P
by exxos
Mon Oct 22, 2018 11:48 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 54
Views: 552

Re: DMA port "update" ideas..

Icky wrote:
Mon Oct 22, 2018 11:44 pm
Spoke to soon its temperamental. Went to put in the HDD and it did not boot. No signal this time.

Put it back to 8MHz and its working again.
Assume you going through a 33R resistor to the DMA clock pin ?
by exxos
Mon Oct 22, 2018 11:40 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 54
Views: 552

Re: DMA port "update" ideas..

Icky wrote:
Mon Oct 22, 2018 11:34 pm
Nope its booted - The 16MHz needed to be buffered so I took it from the 16MHZ_BUFFERED_1 that was spare on IC900 pin 12
oh sweet! benchmark time then ;)
by exxos
Mon Oct 22, 2018 11:28 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 54
Views: 552

Re: DMA port "update" ideas..

Icky wrote:
Mon Oct 22, 2018 11:16 pm
Only just got to trying this out.

Clocking DMA to 16MHz the board did not function. Just got white screen and nothing else.

Need to look at what is going on but not sure if I will have much more time tonight.
Dam DMA! OH well, was worth a try :)
by exxos
Mon Oct 22, 2018 11:27 pm
Forum: STF REMAKE PROJECT
Topic: DMA port "update" ideas..
Replies: 54
Views: 552

Re: DMA port "update" ideas..

not sure how acsi works, but wont it allow internal and external at once, like scsi ? i remember back in the day you could use pass through cables and connect many devices ? or maybe im mistaken, the external boxes i had did contain acsi to scsi host interfaces. Not really sure.. I know SCSI drives...
by exxos
Mon Oct 22, 2018 10:22 pm
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 75
Views: 5251

Re: BLITTER RE-CREATION THOUGHTS

So my findings are firstly a diode doesn't drop enough voltage and ends up being 4.2V not 3.3V, so a regulator be better really on these things.. 5V isn't 5V output, ends up 4.2V.. 3.3V should still be able to drive a logic 1 on a 5V rail anyway.. Main problem is when the 3.3V side isn't connected t...
by exxos
Mon Oct 22, 2018 9:39 pm
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 75
Views: 5251

Re: BLITTER RE-CREATION THOUGHTS

Man, these chips are tiny! :lol:

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