Search found 328 matches

by mpattonm
Thu Nov 15, 2018 11:05 am
Forum: Professionals
Topic: dead Falcon
Replies: 18
Views: 3238

Re: dead Falcon

GAL listings as follows
by mpattonm
Thu Nov 15, 2018 10:45 am
Forum: Professionals
Topic: dead Falcon
Replies: 18
Views: 3238

Re: dead Falcon

There are four 16"something"8 left to the RTC chip: U62, U63, U67, U68 and one 20"something"8 just right to the memory slot. Its U44 I guess
by mpattonm
Thu Nov 15, 2018 10:25 am
Forum: Professionals
Topic: dead Falcon
Replies: 18
Views: 3238

Re: dead Falcon

If you have EPROM programmer that supports PAL/GALs, you could rea&verify contents of those 5 that are on Falcon mainboard. PALs/GALs are known to change their contents randomly with age. Are Falcon GALs/PALs really readable, i.e. don't have their read-protect fuse blown? So far I have seen Fal...
by mpattonm
Thu Nov 15, 2018 8:50 am
Forum: Professionals
Topic: dead Falcon
Replies: 18
Views: 3238

Re: dead Falcon

If you have EPROM programmer that supports PAL/GALs, you could rea&verify contents of those 5 that are on Falcon mainboard. PALs/GALs are known to change their contents randomly with age.
by mpattonm
Wed Nov 14, 2018 7:16 pm
Forum: Professionals
Topic: dead Falcon
Replies: 18
Views: 3238

Re: dead Falcon

Where are you from?
by mpattonm
Tue Nov 13, 2018 8:40 pm
Forum: Hardware
Topic: Atari STe 1040 - Joystick fault
Replies: 11
Views: 2497

Re: Atari STe 1040 - Joystick fault

Look here for the motherboard part: https://centuriontech.eu/product/1040ste-recap-set/
As regards to PSU, it depends on what model you have in.

PS: The recap might not go as easy as on Speccy.
by mpattonm
Fri Nov 09, 2018 3:51 pm
Forum: Hardware
Topic: Atari STe 1040 - Joystick fault
Replies: 11
Views: 2497

Re: Atari STe 1040 - Joystick fault

I would check the voltage levels on ACIA chip with oscilloscope. It may be the power supply is failing to cover increased consumption of system under load, causing voltage drop below operational levels. This scenario is yet more probable, if the PSU and mainboard have not been recapped yet.
by mpattonm
Thu Nov 08, 2018 9:24 am
Forum: Professionals
Topic: Eagle cad library
Replies: 6
Views: 1712

Re: Eagle cad library

No, I do not have such, sorry.
by mpattonm
Wed Nov 07, 2018 7:15 pm
Forum: For sale / Wanted
Topic: Atari 800xl computer And Atari 1050 Disk Drive
Replies: 2
Views: 1530

Re: Atari 800xl computer And Atari 1050 Disk Drive

Whats interesting is that he promotes different seller every time. No prob with that, its just I do not see the point.
by mpattonm
Wed Nov 07, 2018 6:34 pm
Forum: Professionals
Topic: Eagle cad library
Replies: 6
Views: 1712

Re: Eagle cad library

Here you are, attached.
by mpattonm
Wed Nov 07, 2018 3:32 pm
Forum: Professionals
Topic: Eagle cad library
Replies: 6
Views: 1712

Re: Eagle cad library

I will upload later on today, when I get home. Please hold on.
by mpattonm
Mon Nov 05, 2018 8:01 pm
Forum: Hardware
Topic: falcon Testkit
Replies: 8
Views: 1816

Re: falcon Testkit

Well I have tried making all connection as above, still no go. There is at least one invalid information in the source comments and that is EXT_INT test is beeing triggered by GP1 rather then GP0. Positively. Now it seems to me Atari might have changed the test designed between 1.20 and 1.27b I am a...
by mpattonm
Mon Nov 05, 2018 5:08 pm
Forum: Professionals
Topic: Falcon diagnostic cart
Replies: 20
Views: 3497

Re: Falcon diagnostic cart

Indeed, AT27C4096 in PLCC44 packaging is not 1:1 pin-mapped to DIP40 packaging (obviously :) ) I can send you programmed Hitachi EPROM for some 5EUR plus P&P, if it helps. Or I can send you an adaptor PCB that does a proper 27C4096 PLCC to DIP pinout mapping. All you will need is PLCC 44pin SMT ...
by mpattonm
Fri Nov 02, 2018 11:24 pm
Forum: Hardware
Topic: Dead Falcon resuscitation
Replies: 42
Views: 7768

Re: Dead Falcon resuscitation

There is number of them all across the board. Search for this component:
https://i.ebayimg.com/images/g/DrwAAOSw ... s-l300.jpg
by mpattonm
Fri Nov 02, 2018 8:44 am
Forum: Professionals
Topic: Falcon diagnostic cart
Replies: 20
Views: 3497

Re: Falcon diagnostic cart

I know its not what you want to hear, but you might want to consider building a new test cart from ready made sources: https://easyeda.com/nplanel/Atari_Test_Kit_All_in_One-3e1f99cffcd74894ac7c5511bc35f41c Dead simple to build, Falcon test image already included, works out of the box. Or just downlo...
by mpattonm
Fri Nov 02, 2018 6:36 am
Forum: For sale / Wanted
Topic: SOLD OUT!: Atari Test (and others...) cartridge! 2nd Batch.
Replies: 21
Views: 3617

Re: SOLD OUT!: Atari Test (and others...) cartridge! 2nd Batch.

You could make a cartridge version of some Basic too.
by mpattonm
Thu Nov 01, 2018 6:12 pm
Forum: Professionals
Topic: Falcon diagnostic cart
Replies: 20
Views: 3497

Re: Falcon diagnostic cart

either your eprom burner app can do it, or find yourself suitable hex editor. google some.
by mpattonm
Thu Nov 01, 2018 2:40 pm
Forum: Professionals
Topic: Falcon diagnostic cart
Replies: 20
Views: 3497

Re: Falcon diagnostic cart

damanloox wrote:
mpattonm wrote:yes,you can.

any clues/how-tos...? ;)

sure! buy two eproms of correct size, download all four images, join them, byteswap, split to even & odd, burn them, install.
by mpattonm
Wed Oct 31, 2018 9:03 pm
Forum: Professionals
Topic: Falcon diagnostic cart
Replies: 20
Views: 3497

Re: Falcon diagnostic cart

yes,you can.
by mpattonm
Mon Oct 29, 2018 8:08 pm
Forum: Hardware
Topic: Faulty Atari 520STe - black screen
Replies: 21
Views: 2016

Re: Faulty Atari 520STe - black screen

EDIT - interesting, 555 @ U104 is getting hot (hadn't noticed that before) - appears to be no output on PIN3 (OUTPUT) and outputs on U210 are low. When the Reset button is pressed I get HIGH on the 555 OUTPUT Carefully lift pins 2 and 4 of U210 from PCB and measure the signal levels on them, while ...
by mpattonm
Mon Oct 29, 2018 3:35 pm
Forum: Hardware
Topic: Faulty Atari 520STe - black screen
Replies: 21
Views: 2016

Re: Faulty Atari 520STe - black screen

...and take a look at the reset circuit to see what it is doing. I guess you have already answered your own question: ok, got myself a logic probe - results are: BERR - HIGH HALT - LOW RESET - LOW Both RESET and HALT are "active low" signals, meaning your CPU is stuck in reset condition. ...
by mpattonm
Mon Oct 29, 2018 8:43 am
Forum: Hardware
Topic: Falcon dead CPU replacement
Replies: 7
Views: 882

Re: Falcon dead CPU replacement

Depending on how bad ripped pads look like (post high-res pics) I would suggest to buy MC68030FE as they can be obtained for less then 10E/pc and pay remaining 90EUR to someone who will fix your board properly.
by mpattonm
Fri Oct 26, 2018 11:18 am
Forum: For sale / Wanted
Topic: Atari 1040 STE Computer
Replies: 3
Views: 633

Re: Atari 1040 STE Computer

Thats one seriously failed oxy job.
by mpattonm
Wed Oct 24, 2018 2:34 pm
Forum: For sale / Wanted
Topic: ATARI FALCON 030
Replies: 5
Views: 1188

Re: ATARI FALCON 030

If that sells, I do not want to live on this planet anymore ;)
by mpattonm
Thu Oct 18, 2018 4:21 pm
Forum: Professionals
Topic: Falcon Nova Adapter ...
Replies: 30
Views: 2622

Re: Falcon Nova Adapter ...

closely watching...

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