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tf_hh

Member Since 11 Sep 2007
OFFLINE Last Active May 26 2015 6:05 AM

#3210248 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Wed Apr 1, 2015 7:23 AM

Hi,

 

An 800XL I tested had a faulty memory chip, and the 130XE I tried had several faulty memory chips. That leaves the question:

Does Sys-Check check both memory banks, or just one (the first 64k)?

 

Thanks for feedback. Actually Sys-Check V1.3 only tests the main memory (64 KByte). In the future I will support also testing the extended memory.

 

To test to expanded memory in the 130 XE there´s an easy way: Just cross the both 33 Ohm resistors above the 16 pin "EMMU" (CO25953) IC. Crossing them exchanges main bank with extended bank. Sys-Check then also detects bad memory.

 

Juergen




#3198183 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Sun Mar 15, 2015 4:41 AM

Hi,

 

Hello, I assembled my syscheck II, everything went together well.

 

This is with U1mb settings all set to stock.

 

This is the only machine I have tested it on so far, so not sure if it is indeed my 130xe memory or something I did wrong in building my syscheck II

 

Thanks for feedback. As I noticed in the technical manual, it´s not recommanded to use Sys-Check together with an U1MB. The reason is the kind of low-level access both expansion do to the whole system. It MUST cause problems. On the other way, there´s no need to use Sys-Check on an U1MB equipped Atari XL/XE really... ;)

 

So it´s always better to use Sys-Check on systems without U1MB. When you want to do diagnostics on a dead computer with U1MB, it´s the best way to deactivate U1MB first. Detach the both ribbon cables, just plug in old MMU and OS-ROM and system should start, if the U1MB is the source of trouble. Otherwise THEN Sys-Check may be attached to search for bad RAM and so on.

 

BR, Juergen

 




#3189225 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Mon Mar 2, 2015 3:28 AM

Hi,

 

JURGEN, You ROCK MAN !  but the question rises :

 

Please, detach freddy PIN 16 from PCB and run TEST - syscheck will confirm memeory is OK, what cannot be true !

 

Thanks for feedback to all!

 

Lotharek, without having a look on real hardware now, I think this might be a conceptional thing. When I remember right, the addresslines on the XE mainboards are routed from cartridge/ECI, CPU to the bottom (ROMs) and then left to the Freddy. So the Freddy is the other "end" point. If not, then you couldn´t have a picture, because LS138 also is not connected to A8 and hardware I/O can´t be accessed right.

 

So when only Freddy is "cut" from A8, then RAM access might be correct - but with "holes" every 256 bytes. Is the RAM faulty in this computer? Maybe not really.

 

But this behavior forwards me to a better idea for RAM-testing... after writing ones and zeros to RAM to test, I will add writing a page number and re-test it when complete memory is tested. If the page numbers aren´t equal, there´s any kind of addressing failure, which might cause by an missing trace on the PCB or broken pin like on your socket.

 

Next firmware version is coming asap :-)

 

Best regards, Juergen




#3182623 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Sat Feb 21, 2015 8:48 AM

Hi,

 

now it´s ready... here is the flash utility for Sys-Check II and SST39SF010A flash chip. It´s self-explanatory, just follow the infos on the screen.

 

Regards, Juergen

 

Attached File  Flashtool.zip   15.92KB   39 downloads




#3175293 Is a VBXE Useful?

Posted by tf_hh on Wed Feb 11, 2015 1:35 AM

Hi Bob,

 

The XL14 just happens to clear the GTIA - how fortunate.

 

Bob

 

What is this for a PCB in your 1200XL? Can I get more infos about that, please? ;-)

 

BR, Juergen

 




#3173758 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Mon Feb 9, 2015 2:43 AM

Hi all,

 

I´m already finished with getting all components, the PCBs and so on, so my family helps me to make all shipments ready... now it´s done! :)

 

Today all parcels are dropped at our local post office. In the evening (local time) all purchasers get another information email with each purchasers shipment notification and shipment number.

 

Thanks!

 

Best regards, Juergen




#3152411 ssmb music kaleidoscoop need help for 600XL

Posted by tf_hh on Tue Jan 13, 2015 2:05 AM

Hi Marco,

 

this demo searches for the checksums of the XL operating system version 2 (the ROM including this have the partno. CO61598B). This is the most used operating system version in all 600 and 800 XL computers.

 

But some 600XL have an earlier version of the operating system with no PBI support built in. Maybe your 600XL has such a version... then change to C061598B ROM type.

 

BR, Juergen




#3151121 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Sun Jan 11, 2015 1:45 PM

Hi all,

 

after full testing, I can offer an unnamed feature (until now) of the newer Sys-Check V2.1 version, which will be delivered to all people who orders the D.I.Y. assembly kit.

 

The newer Sys-Check V2.1 version will be delivered with a SST39SF010A flash rom instead of an EPROM. So everybody - even if there´s no EPROM burner at home - is able to update newer Sys-Check firmware versions or also able to flash any operating system when using Sys-Check as an external OS switcher. Programming a new operating system or Sys-Check firmware is easy with self-explaining software. I will have the software ready when all kits are delivered. The flash tool will be availible in english and german language.

 

With this new feature, Sys-Check is not only a diagnostic tool, also a very easy to use external OS selector without the need to open the case and change anything on the computer.

 

Orders still welcome until January, 14th (end of day).

 

Best regards, Juergen




#3147338 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Tue Jan 6, 2015 4:32 AM

Hi,

 

 

Do all orders come with the EPROM 27010/271001 (128 KByte)?

With Sys-Check Firmware and three operating systems?

What 3 OS's are you pre-programming?

 

Yes, all kits are equipped with an 128 KByte EPROM, so three operating systems (plus Sys-Check firmware) can be used. When order and payment timeline is closed, I will ask all buyers via email, which OS they want and program them. If no answer is given, then a standard choice will be used :)

 

Best regards, Juergen

 




#3143761 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Thu Jan 1, 2015 3:53 AM

Hi Bill,

 

I know the design is completed, but would it be possible to add a third row of holes between those for the PBI card edge connector, duplicating 1 of the existing rows? This would allow use of a 50-pin header for use with a ribbon cable(the header row spacing is 2.54mm/0.1" instead of the 5.08mm/0.2" spacing for the edge-card connector), this would allow either connector to be used as desired. The use of ribbon cable means the device doesn't have to stick up vertically on the back of an XL computer.

 

A good idea - thank you. I will change the PCB with this new row, no problem.

 

Best regards, Juergen




#3143011 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Wed Dec 31, 2014 4:59 AM

Hi again,

 

another information, because I receive a question about it and want to clarify...

 

Of course both logic chips (GAL 22V10) and the EPROM is programmed with the needed content. So you must not be able to burn GALs or EPROMs.

 

Best regards, Juergen




#3143010 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Wed Dec 31, 2014 4:54 AM

Hi,

 

Wow man! I did not understand this, but what do you say? Can an Atari 8bit have an EXTERNAL OS? 

 

This is extremely interesting! So your SysCheck + a MyIDE interface could give a stock atari XL/XE a fabulous compatible combination with the MyBIOS in ROM? In this SysCheck device??

 

Yes, this is the second goal for Sys-Check. To enable a diagnostic software even if the computer doesn´t start in case of bad memory or a bad operating system ROM, I must enable the possibility to get control about the complete address range of the Atari. This is realized by draining the refresh line down (low), the Atari MMU is deactivated during this time and Sys-Check mirrors the operating system you want to the address bus. Without this, Sys-Check can´t more than any diagnostic cartridge like SALT, but this is not enough, as everybody knows who is doing repairs.

 

So you can use ANY operating system or firmware that works in the address range from $C000-$FFFF. You can also use an OLD-OS from the 400/800 series (using only $D800-$FFFF), a XL OS patched with Hias´ High-Speed SIO or QMEG or whatever you want. Some OS like SPOS (a german patched one) doesn´t support correct checksums, so the checksum test of Sys-Check will always fail - but this has no effect of using such an operating system.

 

The V2.1 can hold four different operating systems, if you want to use Sys-Check diagnostic features, you´ve three operating systems for general use free.

 

Best regards, Juergen

 




#3142444 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Tue Dec 30, 2014 11:26 AM

Hi all,

 

I forget something to mention... All purchasers of the Sys-Check assembly kit will receive the newer version 2.1 - the difference to V2.0 (which is the one sent to the ABBUC hardware-contest) is the ability to use up to 128 KByte EPROMs (27128 / 27256 / 27512 and 27010/271001) holding up to four different Sys-Check firmware versions or XL/XE operating systems.

 

This feature enables Sys-Check also to be a kind of external OS switcher. Two additional DIP switches allows manually selection of one of the four operating systems.

 

This new usage is an idea from two guests at the ABBUC general annual meeting hold at the end of october 2014. Thanks, folks.

 

Best regards, Juergen




#3141657 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Mon Dec 29, 2014 9:45 AM

Hi Marius,

 

I will place my order through e-mail!

 

One more question though:

 

Are the JEDEC files freeware, so in the (far) future I could fix the device if one of the gals or microcontrolers might get broken?

 

Thanks a lot!

Marius

 

Yes, Sys-Check II is freely published. In the attachment of this post you will find all files needed. Of course I publish also newer versions to the community.

 

Regards, Juergen

 

Attached Files




#3141197 Orders for Sys-Check II (PCB w/ parts only) accepted

Posted by tf_hh on Sun Dec 28, 2014 1:52 PM

Hi there,

 

announced for the ABBUC hardware contest, my project "Sys-Check" takes 3rd place - thanks to all voters. Now I´m ready to ship out the solution to all who are interested in.

 

Sys-Check_II.jpg

 

Sys-Check will be only offered as D.I.Y. assembly kit. You will get:

 

- one high quality, gold finished PCB with markings and explanations on it

- all parts including sockets, chips, resistors, cables and so on to finalize it

 

Each assembly kit costs 25 euros (approx. 31 US dollar at today) plus shipping (from 5.60 euros to 27 euros depending on the destination and amount of orders). I only sell complete kits, no single PCBs or less parts.

 

Timeline:

 

- Orders accepted until January the 14th 2015

- Payment via bank transfer or paypal must be done until January the 19th 2015

- All orders after 14th January will be canceled, all payments after 19th January will be refunded

- PCB order will be placed on January 20th

- Delivery of each kit to buyer approx. at the end of February (depending on international shipping times)

 

This will be the first and last batch.

 

If you´re interested, please place order by EMAIL. I will not accept orders here in the forum or by personal message (PN). Please email your order to tf_hh@gmx.de. You will get an answer within 48 hours. Please sent my the name of your country to calculate shipping costs before I answer you.

 

In the attachment of this post you will find the english translation of Sys-Check manual.

 

Best regards, Juergen

 

Attached Files