Search found 1155 matches

by exxos
Sun Jan 21, 2018 12:14 am
Forum: ST 16MHz V2.5 BOOSTER
Topic: V2.5 BOOSTER CURRENT PROTOTYPE STATUS
Replies: 62
Views: 2232

Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Yeah 22mhz constant likely kills acia access.. Though 8/22 switching shouldn't matter about isolation of signals as they are isolated by CPU itself and of course isolated when /as is high anyway. I documented 22mhz constant needed LDS UDS isolation was needed.. Though shouldn't be needed for 8/22mhz...
by exxos
Sat Jan 20, 2018 5:47 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: dev-docs mirror & php issues
Replies: 15
Views: 206

Re: dev-docs mirror & php issues

I got a rather insulting email from lonny about my "broken" mirror. It looks like my fixed pages were updated with newer copies and undid my search script and fixed pages. A simple error. It was all up and working when I posted and not had time to check on it since. I asked for help for the search f...
by exxos
Sat Jan 20, 2018 10:32 am
Forum: ST 16MHz V2.5 BOOSTER
Topic: V2.5 BOOSTER CURRENT PROTOTYPE STATUS
Replies: 62
Views: 2232

Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

That is weird indeed. I'll need to think about that one. I'll ping you if I have an idea Looking at my original dev-board that I was doing async tests, it looks like I could run the CPU at 16mhz all the time from the system clock, but while I got to desktop with 20mhz, I assumed ACIA overclock prob...
by exxos
Fri Jan 19, 2018 9:58 pm
Forum: ST 16MHz V2.5 BOOSTER
Topic: V2.5 BOOSTER CURRENT PROTOTYPE STATUS
Replies: 62
Views: 2232

Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Are you still doing the clock sync we were doing on the "old" booster as these are unrelated clocks ? Its same code as in V2.2 booster, and STE booster. But code works fine on STE up to 38MHz.. on the STFM.. nope.. refuses to work. Really when CPU not accessing the bus, the CPU should be able to ru...
by exxos
Fri Jan 19, 2018 8:24 pm
Forum: ST 16MHz V2.5 BOOSTER
Topic: V2.5 BOOSTER CURRENT PROTOTYPE STATUS
Replies: 62
Views: 2232

Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

This is running at 22 MHz.. And extremely unstable.. The image below is the absolute best I have seen it.. Mostly I just gave bombs on power up, or X's on ram test and end up with 128K instead of 512K. I have tried absolutely everything I can think of over the past few hours to trying figure this ou...
by exxos
Fri Jan 19, 2018 5:57 pm
Forum: FOR SALE & WANTED
Topic: FOR SALE - EXTERNAL RTC CARTRIDGE PCB
Replies: 2
Views: 137

Re: FOR SALE - EXTERNAL RTC CARTRIDGE PCB

rubber_jonnie wrote:
Fri Jan 19, 2018 3:58 pm
Are these still for sale?
Yes :)
by exxos
Fri Jan 19, 2018 5:07 pm
Forum: ST 16MHz V2.5 BOOSTER
Topic: V2.5 BOOSTER CURRENT PROTOTYPE STATUS
Replies: 62
Views: 2232

Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

So I've been trying for the past few hours to use a 22MHz osc for not having much luck :( the clock switching looks fine, and I have tried delaying and syncing /AS & /DTACK on rising and falling edge is and adding a 8MHz delay.. I'll try adding in some more delays but this does not seem right direct...
by exxos
Fri Jan 19, 2018 1:56 pm
Forum: HARDWARE ESSENTIALS
Topic: STE Dual TOS switcher widget
Replies: 9
Views: 95

Re: STE Dual TOS switcher widget

rubber_jonnie wrote:
Fri Jan 19, 2018 1:49 pm
Interesting redesign. My temptation after installing this, would be to mount it below the TOS switcher PCB, rather than above, as I've done, as it would clear the FDD better.
Thats a good idea, I never thought of that!
by exxos
Fri Jan 19, 2018 1:27 pm
Forum: ST 16MHz V2.5 BOOSTER
Topic: V2.5 BOOSTER CURRENT PROTOTYPE STATUS
Replies: 62
Views: 2232

Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Current setup... IMG_2171.JPG 16MHz with blitter OFF. v2616.jpg 16MHz with blitter ON. v2616b.jpg I don't think I ever posted images of the clock switching before... YELLOW : CPU CLOCK BLUE : /AS as16.png CLOSER LOOK as162.png When /AS goes high, the CPU gets switched into 16MHz. When /AS goes low, ...
by exxos
Fri Jan 19, 2018 12:46 pm
Forum: FOR SALE & WANTED
Topic: FOR SALE PAK020 PCB
Replies: 2
Views: 53

Re: FOR SALE PAK020 PCB

BTW Frank, do you have any tested CPU's which work in PAK ? I remember you had issue with 020 cpus.. I "lost" the CPU I got with my PAK (you built it and supplied tested for me long time ago) I tried other 020's but best I can get in row of bombs on the screen now :(