Search found 1794 matches

by exxos
Wed May 16, 2018 9:04 am
Forum: HARDWARE ISSUES
Topic: 1040STe locks up or bombs out after warming up
Replies: 11
Views: 194

Re: 1040STe locks up or bombs out after warming up

I would change the CPU.. then change the SIL's for 2.2K. (P100 should be 1.2K)
by exxos
Tue May 15, 2018 10:29 pm
Forum: ST 16MHz V1.5 BOOSTER
Topic: V1.5 booster & Blitterpatch
Replies: 3
Views: 67

Re: V1.5 booster & Blitterpatch

It should be ok, I would remove the patch and give your machine a good try out first just to be sure.
by exxos
Tue May 15, 2018 9:06 pm
Forum: ST 16MHz V1.5 BOOSTER
Topic: V1.5 booster & Blitterpatch
Replies: 3
Views: 67

Re: V1.5 booster & Blitterpatch

If you have a more "recent" blitter, then remove the patch and fix the trace under the CPU.. The patch is only needed on early blitters.

See bottom of this page...

http://www.exxoshost.co.uk/atari/last/MEGAST/index.htm
by exxos
Tue May 15, 2018 7:07 pm
Forum: PSU (power supplies)
Topic: Future PSU designs
Replies: 38
Views: 2729

Re: Future PSU designs

I like Guss assmans idea of making the voltage selection user-solderable, to make sure mistakes aren't made on the user end. Problem is, people get confused easily over what wires to solder where as it is :roll: Though I probably will sell these without primaries connected as it saves me having to ...
by exxos
Tue May 15, 2018 4:15 pm
Forum: HARDWARE ISSUES
Topic: 1040STe locks up or bombs out after warming up
Replies: 11
Views: 194

Re: 1040STe locks up or bombs out after warming up

I would suggest trying the HC type CPU and see if that helps.. As troed said also, you may need to change the SIL resistors.. what values are on the address and databus on your machine ? (they are located around the CPU & blitter ). All the red ones like on this image.. https://www.exxoshost.co.uk/f...
by exxos
Tue May 15, 2018 11:54 am
Forum: PSU (power supplies)
Topic: Future PSU designs
Replies: 38
Views: 2729

Re: Future PSU designs

Some scopes on the output under dummy load.. 5V loaded with 2.2R ( 2.27 Amps) 10mV ripple and noise (0.01 Volts) Probably about 5mV ripple alone. 5v______.png 5V loaded with 1R (5 Amps) 6mV ripple & Noise ( 0.006 Volts) 5v2_____.png 12V loaded with 10R (1.2 amps) 18mV ripple and noise (0.018 Volts) ...
by exxos
Tue May 15, 2018 11:48 am
Forum: PSU (power supplies)
Topic: Future PSU designs
Replies: 38
Views: 2729

Re: Future PSU designs

dhedberg wrote:
Tue May 15, 2018 11:45 am
Sexy! Like the color of the PCB! :-)
Prototype colour ;) Actually not sure what colour to make the finals yet..
by exxos
Mon May 14, 2018 7:54 pm
Forum: PSU (power supplies)
Topic: Future PSU designs
Replies: 38
Views: 2729

Re: Future PSU designs

2 months gone so fast since last update!

So 2 boards pasted up, most parts on.. and now in the cooker!

p2.jpg
p2.jpg (98.21 KiB) Viewed 200 times
IMG_2647.JPG
IMG_2647.JPG (216.35 KiB) Viewed 196 times

To be continued...
by exxos
Mon May 14, 2018 4:19 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: FALCON RTC MODULES ALMOST COMPLETED
Replies: 9
Views: 894

Re: FALCON RTC MODULES ALMOST COMPLETED

New Falcon RTC boards heading towards stock this week :)

https://www.exxoshost.co.uk/atari/last/storenew/#0089

rtc.jpg
rtc.jpg (152.92 KiB) Viewed 96 times
by exxos
Mon May 14, 2018 11:57 am
Forum: HARDWARE ISSUES
Topic: 1040STe locks up or bombs out after warming up
Replies: 11
Views: 194

Re: 1040STe locks up or bombs out after warming up

Did you recap with one of my kits or some other brands of caps ? Checked for bad joints all over the board ? new switch ?

I would run this program and leave it on for a few hours and see what happens..viewtopic.php?f=25&t=28