Search found 262 matches

by Bikerbob
Wed Oct 09, 2019 12:46 pm
Forum: Hardware
Topic: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter
Replies: 12
Views: 2353

Re: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter

OK dug it out of storage, it looks like there are only two resistors that need linking to +5v: R134 and R133 hope this helps. thanks.. as posted I have removed the upgrade.. machine is fine.. something was either bad when I got it.. or I damaged something I guess. Anyway.. I see several upgrades on...
by Bikerbob
Wed Oct 09, 2019 12:40 pm
Forum: Hardware
Topic: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter
Replies: 12
Views: 2353

Re: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter

Well I removed the upgrade.. have been running memory tests all morning.. its not the machine its the ram expansion. I have no idea if I have managed to damage anything.. my bench is anti static matted, and I have been doing electronics etc for the 40 years. So I have a good idea of what I am doing....
by Bikerbob
Wed Oct 09, 2019 2:48 am
Forum: Hardware
Topic: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter
Replies: 12
Views: 2353

Re: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter

20191008_223504.jpg
20191008_223501.jpg
20191008_223454.jpg


Now, I get nothing but a Black screen.. when I did not pull up the resistors I had 2.5meg and the machine worked fine.. now nothing.

James
by Bikerbob
Wed Oct 09, 2019 2:46 am
Forum: Hardware
Topic: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter
Replies: 12
Views: 2353

Re: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter

So I did the exact same thing.

This forum is very frustrating.. all my file sizes are under 500k as per rules, and it will still not allow my pics to be uploaded.
screen.jpg
by Bikerbob
Tue Oct 08, 2019 4:56 am
Forum: Hardware
Topic: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter
Replies: 12
Views: 2353

Re: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter

REV H --- I think its R133 and R134 but with just those 2.. do I tie the ends of the resistors together and to the 5v?? I saw this..

https://atari.joska.no/520stm/4Mb%20RAM ... 0520ST.pdf and thats how I found the above resistors.. but I am not sure how I tie them to 5v now.

James
by Bikerbob
Tue Oct 08, 2019 3:20 am
Forum: Hardware
Topic: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter
Replies: 12
Views: 2353

Re: [PICS] Exxos 4Meg RAM card fitting - with soldered shifter

I need help with this one.. 520st.. no row of resistors and R59, R60,R61 are not all the same value on this board.

How do I know what resistors to pull and run to 5v?
by Bikerbob
Mon Oct 07, 2019 3:50 pm
Forum: Professionals
Topic: Dead Falcon
Replies: 13
Views: 654

Re: Dead Falcon

I have a friend local that has a dead Falcon, is there anyone in NA or EUROPE that does falcon repairs? He has tried lots, it had a mod in it that I think went bad, and he really does not want to mess with it anymore, just wants to get it fixed..

James
by Bikerbob
Mon Oct 07, 2019 2:58 pm
Forum: Hardware
Topic: Installing the PAK68/3
Replies: 34
Views: 1049

Re: Installing the PAK68/3

Thanks so much for this thread TheNameOfTheGame as I hope to be dealing with this myself very soon. I am putting mine in a mega ST/4 and I do have some issues with some of the soldered on RAM -10ns but I was not aware of some of the other things to look for, so this really made me aware I have to go...
by Bikerbob
Wed Oct 02, 2019 12:54 pm
Forum: Hardware
Topic: Help Forget Me Clock
Replies: 24
Views: 2750

Re: Help Forget Me Clock

There is a packaged up group of utilities called RTC.zip that contain a program .. maybe you wrote it? that will go to the RTC at address and set and then fetch the time see if it matches? therefore confirming if it is handling the new year number 17,18 ,19 etc.. correctly.

James
by Bikerbob
Sat Sep 28, 2019 6:51 pm
Forum: Hardware
Topic: Help Forget Me Clock
Replies: 24
Views: 2750

Re: Help Forget Me Clock

There is a quite a long topic about my investigation and a hardware clock: https://www.exxoshost.co.uk/forum/viewtopic.php?f=10&t=544 ...and I was wrong, the limit is 2059 (year "F9" in pseudo-BCD, so 1900 + 159), not 2027 (1900 + 127, because it is 1980 + 127). Yep.. looking at this....
by Bikerbob
Sat Sep 28, 2019 2:11 am
Forum: Hardware
Topic: Help Forget Me Clock
Replies: 24
Views: 2750

Re: Help Forget Me Clock

IF you are someone who can look at a Chip datasheet and tell me if the chip can do post 2000 years.. can you look at the above? I see there is 2 bits for the year Y1 and Y10 - nothing stating where the date starts? or what its assuming.. I have several of these devices and I want to know if its wort...
by Bikerbob
Thu Sep 26, 2019 2:39 pm
Forum: Hardware
Topic: Help Forget Me Clock
Replies: 24
Views: 2750

Re: Help Forget Me Clock

ok so a DeskCart! is using a fox rtc32768B which is supposed to be pin for pin compatible with MSM58321RS here is the data sheet. https://www.digchip.com/datasheets/parts/datasheet/340/MSM58321RS-pdf.php So in what I have read I cannot find anything about Y2k.. only that it calc leap years in Gregor...
by Bikerbob
Wed Sep 25, 2019 9:02 pm
Forum: Hardware
Topic: Help Forget Me Clock
Replies: 24
Views: 2750

Re: Help Forget Me Clock

The hint is, that in this 2-digit year formally is BCD, but in reality each digit can be HEX ;) so B9 is a valid year 119 (11 * 10 + 9 * 1), and the internal conversion formula would produce 1900 + 119 = 2019. The old Atari control panel (control.acc) is aware of this, and if you type in year "...
by Bikerbob
Wed Sep 25, 2019 2:34 am
Forum: Hardware
Topic: Help Forget Me Clock
Replies: 24
Views: 2750

Re: Help Forget Me Clock

Necro Post.. Any idea if this stuff applies to the DeskCart!? I have a couple of these and I have replaced the batteries, they hold .. but I can only use 2 digits to set the clock year.. so 19 is 1919 .. Is it just a matter of a different program to set the clock? there is a program that will take t...
by Bikerbob
Fri Sep 20, 2019 5:35 am
Forum: Hardware
Topic: STE repair
Replies: 22
Views: 1014

Re: STE repair

Fixed! - fired up and working.

Have an HXC Gotek with it.. need to figureout how to setup the USB drive... off to the website!

James
by Bikerbob
Fri Sep 20, 2019 4:12 am
Forum: Hardware
Topic: STE repair
Replies: 22
Views: 1014

Re: STE repair

Ok I think this is the key Tzok.

https://ibb.co/MBWSgXS

I think this trace is the Address 17 line that is supposed to go to W104 pin 1..

I have run a jumper from that Via to W104 pin 1 .. seems all addresses are now linked.

I am going to try it.

Do I need a floppy installed to try this??

James
by Bikerbob
Thu Sep 19, 2019 6:08 pm
Forum: Hardware
Topic: STE repair
Replies: 22
Views: 1014

Re: STE repair

kodak80 wrote:With regards to the STE jumpers to TOS ROM connectivity, his Eagle schematic may be helpful. I created this recently from a hand-drawn version created by a friend.
STE TOS ROM schematic.png


Thanks but what do these points refer to?

TOS Schematic1.jpg


James
by Bikerbob
Thu Sep 19, 2019 6:01 pm
Forum: Hardware
Topic: STE repair
Replies: 22
Views: 1014

Re: STE repair

Chandler wrote:You'll need to change the TOS rom sockets too



WHy? I am using 28pin roms.. so nothing will touch the end of the socket. so nothing should be an issue there with a mangled socket.

James
by Bikerbob
Thu Sep 19, 2019 1:04 pm
Forum: Hardware
Topic: STE repair
Replies: 22
Views: 1014

Re: STE repair

Ok, here are some marked up pics. These are the spots I am worried about. Not sure where they run to.. Cant seem to find things they go to. https://ibb.co/album/n8eXgF What is the circuit in pic I have posted with all the E pads.. and what are the E Pads for?? they dont seem to attach to anything. J...
by Bikerbob
Thu Sep 19, 2019 7:34 am
Forum: Hardware
Topic: STE repair
Replies: 22
Views: 1014

Re: STE repair

Thanks for the replies guys. I am trying this with an Exxos STE tos switcher. it would be the 28pin 27c1000 so 2-3 on each. The underside of the board is wired like this.. w103 pin 2 to 3 and from pin3 to Tos HI 32 Tos HI 2 to C114 top to Tos Low 24 I have viewed the schematic as best I can.. All I ...
by Bikerbob
Thu Sep 19, 2019 1:48 am
Forum: Hardware
Topic: STE repair
Replies: 22
Views: 1014

STE repair

Posting here as well for those that might help and not on exxos forum. I have an STE in this condition. https://ibb.co/h7NVb2m Note the W102 W103 area... I did not do it.. this is the way I got the board. There are traces in that area that seem to have been damaged. not positive but i think this is ...
by Bikerbob
Tue Sep 17, 2019 7:26 pm
Forum: Hardware
Topic: Mega ST Keyboard repair
Replies: 0
Views: 317

Mega ST Keyboard repair

Hi, picked up a mega with a mechanical keyboard.

the spacebar is missing the stab wire and one of the inserts. I can find the inserts np.. but finding a replacement wire has not been easy.

Anyone have any ideas?

James
by Bikerbob
Mon Sep 16, 2019 5:11 pm
Forum: CosmosEx
Topic: CosmosEX 3.0
Replies: 113
Views: 41183

Re: CosmosEX 3.0

I went to the page.. What am I missing?? I see a date.. but I dont see anything like an update?? I can only read english.. so not sure if I am missing something?

James
by Bikerbob
Sat Sep 14, 2019 6:08 pm
Forum: For sale / Wanted
Topic: FOR SALE - Atari 520 STE with extras (SatanDisk).
Replies: 5
Views: 2294

Re: FOR SALE - Atari 520 STE with extras (SatanDisk).

FYI.. You will get much more than £170 + P&P and good packing is good packing. I have bought stuff from Germany, Netherlands and lots from the UK and it all arrived ok. YES many people dont know how to ship.. but the fact that your worried about it would seem you know what your doing. STEs are r...
by Bikerbob
Sun Aug 11, 2019 12:44 am
Forum: Hardware
Topic: Announcing the Lightning ST - USB & IDE for STs
Replies: 69
Views: 6302

Re: Pre-announcing the Lightning ST - USB & IDE for STs

Mega STE has internal ASCI, so you can use the UltraSatan either externally or internally. I don't see the requirement for IDE when there is such a solution available. That is a funny response. ..because the exact same thing could be said about any ST machine they all come with an external asci por...

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