Search found 24 matches

by nonameno
Mon Jul 31, 2017 10:51 pm
Forum: Hatari
Topic: monitor/CRT emulation
Replies: 5
Views: 3437

Re: monitor/CRT emulation

up !! ;)
by nonameno
Wed Nov 30, 2016 10:33 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

thx a lot but i cant understant where are the D15 to D10, perhaps a typo on the ram shematic no ? U34 is 8 on it, shouldn't be 10 ?
by nonameno
Wed Nov 30, 2016 9:36 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

is there a shematic where i can see what chip are D15-D10 ?
by nonameno
Wed Nov 30, 2016 7:26 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

ok, U39 replaced now i have I1 RAM/data line error 0000000000000000 1111110000000000 000008 for information i replaced U39 with U47, so empty @U47, but i configured it as a 520 (R73 desoldered pin to 5V) see http://www.atari-forum.com/viewtopic.php?f=15&t=30677#p305040 is this new value describe...
by nonameno
Wed Nov 30, 2016 6:06 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

ok thanks, i will try to replace u39 tonight, btw how do you found that this error message point u39 ?
by nonameno
Wed Nov 30, 2016 3:23 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

yo i'm back !! I receive eeprom diag, put in my cartridge (Ultimate ripper) and it's work ;) i soldered a Null Modem Cable db9<->db25, booted the ST and TADA !! here is the error message : I1 RAM/data line error 0000000000000000 0000001000000000 000008 can we deduce the faulted ram chip ? or somethi...
by nonameno
Mon Nov 21, 2016 6:08 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

dont have it, but can i burn diag cart rom file to eprom, and replace them in my ultimate ripper PCB ? i can order emtpy eprom and burn them at home.
by nonameno
Mon Nov 21, 2016 1:43 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

some new elements that will help you to point the issue : I tested to boot with an ultimate ripper cartridge, ( to check if it is not my tos ), when i power on with the UR switched active, there is still garbage at screen BUT it seems that the normal key ( F1, F2) are working, i mean there is someth...
by nonameno
Tue Nov 08, 2016 11:32 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

Normally faults like that I would swap the ROM's and MMU, GLUE, SHIFTER and see what happens. After that I would try the CPU. Though it doesn't help unless you have a pile of bits anyway.. For what it would cost to get a pile of replacement chips, I dare say it would be cheaper and easier to just g...
by nonameno
Tue Nov 08, 2016 8:30 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

so...same result... :/ perhaps the 1st half is faulty ... any idea ?
by nonameno
Tue Nov 08, 2016 7:00 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

That would be one of several possibilities. Just be sure that you don't accidentally connect 12V instead -- measure with a multimeter if you're unsure. Another possibility to get 5 V is the positive terminal of the big 4700 µF capacitor next to the ROM chips. i was scary coz i can read 16V on it ;)
by nonameno
Tue Nov 08, 2016 6:46 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

exxos wrote:A :)

where to get the 5v ? on the floppy power connector ?
by nonameno
Mon Nov 07, 2016 8:14 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

nonameno wrote:
exxos wrote:Maybe you could post whole image of motherboards ?



hi rez pic -> http://extern.santo.fr/IMG_5286.JPG

BTW : where to get the 5v ? on the floppy power connector ?
by nonameno
Mon Nov 07, 2016 8:14 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

error
by nonameno
Mon Nov 07, 2016 7:25 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

You can indeed quite easily disable the upper 512 kByte of RAM. Desolder the resistor in the RAS1 line (R73 on your board) at the end pointing away from the RAM chips, then connect the now open terminal of said resistor to 5V (from somewhere on the mainboard). Thereby, RAM bank 1 is constantly dese...
by nonameno
Mon Nov 07, 2016 5:39 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

exxos wrote:Maybe you could post whole image of motherboards ? looks like 256k jumper has had some solder, so maybe someone tried to convert this from 256K ROM's to 1MB and failed ?


this is a real 1040 unmodified. i will post the whole motherboard tonight. thx all for your help and advices btw. ;)
by nonameno
Mon Nov 07, 2016 2:30 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

btw it's a 1040. Is there a strap to make it a 520 disabling half the ram ;) avoid me to desolder half the chips to make a first test ?

15007749_10210119954049046_1747931917_o.jpg
by nonameno
Mon Nov 07, 2016 2:29 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

spiny wrote:isopropyl alcohol will be fine, but what actual Atari is it ? does it have any modifications ? has it recently had modifications removed ? has this just started happening ? if so, what did you change ?


no modification, just happened one day.
by nonameno
Sat Nov 05, 2016 11:00 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

paul92706 wrote:I would use alcohol to clean the pins and contacts in the sockets and on IC's, these machines are very old now and can have buildup on pins and sockets for sure!


what kind of alcohol ?? any reference ?
by nonameno
Sat Nov 05, 2016 6:45 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

@czietz : already did it, removed and repositionned, but didnt clean the socket with alcool or stuff like this. Do you think it worth i remove socketed stuff again and clean with alcool ?
by nonameno
Sat Nov 05, 2016 4:34 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

@czietz : no it freeze here, some pixel of the glitches blink a bit but nothing more :/
by nonameno
Sat Nov 05, 2016 4:02 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

any ideas about where to start investigation ??
by nonameno
Sat Nov 05, 2016 1:03 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Re: Glitches / freeze when power on.

i tested with 3 differents, same result... :/
by nonameno
Fri Nov 04, 2016 10:53 pm
Forum: Hardware
Topic: Glitches / freeze when power on.
Replies: 43
Views: 5541

Glitches / freeze when power on.

Glitches like this when power on. Idea ? Ram ? Shifter ?

14725568_10209921703332902_4117229116636824092_n.jpg

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