Search found 1677 matches

by exxos
Fri Apr 20, 2018 8:39 am
Forum: PSU (power supplies)
Topic: TT/Mega STE power supply headaches
Replies: 42
Views: 372

Re: TT/Mega STE power supply headaches

So capacitor is not charging which is the problem... you 100% sure you have put in pcb correct way around ?

You could try removing Q2 and see if PG works then...
by exxos
Thu Apr 19, 2018 10:19 pm
Forum: PSU (power supplies)
Topic: TT/Mega STE power supply headaches
Replies: 42
Views: 372

Re: TT/Mega STE power supply headaches

Do you get 5V and 12 V on one side of R29,R31,R33..

On collector of Q2, turn on and see if the voltage changes over time.. try over 60 seconds...
by exxos
Thu Apr 19, 2018 8:17 pm
Forum: STFM
Topic: C103414 - STFM 4 x SMT DRAM
Replies: 7
Views: 93

Re: C103414 - STFM 4 x SMT DRAM

I like the idea that it's a Friday afternoon workaround because they got higher capacity RAM chips :D it would seen originally they were pads the resistors later were bridged over the tracks on the PCB, and the original holes just not removed.. I would assume this board came out after the 32 chip R...
by exxos
Thu Apr 19, 2018 7:59 pm
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 1426

Re: Suska board

oooooh .... shiny ! ! :D :lolbig: So far I am not really having much luck :( I was trying with my normal monitor with the RGB port and the best I could get was a really out of sync image. So I plugged in my multisync monitor and I just said no signal detected. I was messing about for about two hour...
by exxos
Thu Apr 19, 2018 3:22 pm
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 1426

Re: Suska board

:)

IMG_2439.JPG
IMG_2439.JPG (5.46 MiB) Viewed 141 times
IMG_2441.JPG
IMG_2441.JPG (5.94 MiB) Viewed 141 times
IMG_2442.JPG
IMG_2442.JPG (5.96 MiB) Viewed 141 times
by exxos
Thu Apr 19, 2018 2:29 pm
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 22
Views: 874

Re: BLITTER RE-CREATION THOUGHTS

BLiTTER in FPGA? Really cool idea, I second that. Would be cool to add one feature - hardware C2P conversion. Now, a standard C2P - chunky160x100 to 4-bitplane 320x200 can take up to 480 000 cycles. With 160 000 cycles per frame it is 3 frames. With the BLiTTER speed it could take advantage of copy...
by exxos
Thu Apr 19, 2018 11:23 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 22
Views: 874

Re: BLITTER RE-CREATION THOUGHTS

You couldn't get it to work on the Cyclone-II? The EP2C5s I used for the shifter are only $25 each, and they should have way more LEs and pins than you need, and they're not BGA. Although they are fairly large. I went for the cheapest 3.3V one which would work. No use going for a larger more expens...
by exxos
Thu Apr 19, 2018 10:29 am
Forum: STFM
Topic: C103414 - STFM 4 x SMT DRAM
Replies: 7
Views: 93

Re: C103414 - STFM 4 x SMT DRAM

What is that empty section to the right of the empty bank, with the large cap to the top right? No idea... Looks like a bunch of pointless jumper tracks which basically jump over section of other track doesn't go to anything :shrug: looks like we got a bit of a mystery.. Maybe it was just left over...
by exxos
Thu Apr 19, 2018 10:13 am
Forum: HARDWARE DISCUSSIONS
Topic: Has anyone thought of recreating the Milan
Replies: 4
Views: 69

Re: Has anyone thought of recreating the Milan

Yes, I did. I talked to the guy some years ago about recreating the machine. I asked about what would be involved in releasing the board again, even obtaining all the schematics and codes to improve on it, or possible licensing agreements to produce it. I never got a reply to those questions. But th...
by exxos
Tue Apr 17, 2018 7:10 pm
Forum: PSU (power supplies)
Topic: TT/Mega STE power supply headaches
Replies: 42
Views: 372

Re: TT/Mega STE power supply headaches

That's interesting as my TT always powered up in less than a second from brand new. It was *click* (about half a second) wurrr. Be interesting if you could change C8 for a newer capacitor and see what the startup time is then. The one I had took about 4 seconds to turn on, its why I lowered the val...