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flashjazzcat

Member Since 23 Nov 2008
OFFLINE Last Active Today, 1:44 PM

#4091474 Ultimate 1MB, Incognito, 1088XEL and SIDE/SIDE2 Firmware Update Released

Posted by flashjazzcat on Yesterday, 2:53 PM

Once the OS gets control on a cold start it clears out all the RAM, so it's difficult to imagine how a different BIOS revision might impact things. Only a few U1MB hardware registers remain exposed if SDX is turned off (and the PBI BIOS is disabled, which I'm sure you're doing), and unfortunately I don't own The!Cart and therefore can't do any tests here.




#4091359 ATARI Computers HDMI, VGA, COMPONENT VIDEO, S-Video, Composite video and RF

Posted by flashjazzcat on Yesterday, 10:53 AM

Well, that's why spam is called spam, so the reference is far from tenuous.


#4091357 Atari XL White/Cream Paint Color

Posted by flashjazzcat on Yesterday, 10:51 AM

9001 doesn't look too bad, although this monitor isn't calibrated. Link is broken, BTW:

https://www.ralcolor.com/

The paint I used to use and which I considered an excellent XL match was Satin 'Porcelain' by Plastikote.


#4091183 Altirra 3.10 released

Posted by flashjazzcat on Yesterday, 4:18 AM

It is Paul's humour.


It's as good a reason as any to leave the UK. :)


#4090837 Hardware floppy drive emulators

Posted by flashjazzcat on Mon Aug 13, 2018 2:47 PM

So can we assume from all this that you now have a fully working Atari and are looking for new challenges? :)


#4090557 Altirra 3.10 released

Posted by flashjazzcat on Mon Aug 13, 2018 5:50 AM

I could doubtless listen to Avery talk about his projects all day had he the inclination to participate in interviews and podcasts, but that kind of attention does not appear to be his thing. Clearly one can still be modest, despite having written the best emulator for the best 8-bit computer.

 

Avery's attitude to feature requests and bug reports also strikes a perfect balance between diplomacy and single-mindedness. He won't entertain the frivolous, but constantly strives to improve usability and accuracy. He is remarkably responsive (despite the occasional whining of the odd Millennial who expects their every demand to be satisfied post haste), approachable and authoritative. His technical documentation is also second to none, and I cherish the bound two-volume copy of the Altirra Hardware Reference Manual that a forum member very kindly sent me a year or so back.

 

Absolutely outstanding work from and outstanding talent.




#4090158 AVGCart

Posted by flashjazzcat on Sun Aug 12, 2018 1:48 PM

Can the AVG cart SD be FDISKed and partitioned like the Side2 and CF..

 

Should work just fine. You can even drive the HDD with the PBI BIOS on an U1MB machine. To all intents and purposes, the SD card behaves like a CF card in a SIDE cart.




#4090054 AVGCart

Posted by flashjazzcat on Sun Aug 12, 2018 11:13 AM

You have SDX, since AVG emulates it. You won't get very far running an executable which requires a file system (or which depends on the presence of SDX) straight from the loader.




#4089572 Atari 800xl Missing Last 8 Bytes of RAM?

Posted by flashjazzcat on Sat Aug 11, 2018 2:43 PM

The BASIC ROM accounts for 8KB (kilobytes, not bytes) and the operating system is 16KB long, which added together make 24KB. 64 - 24 = 40, which is the number of RAM blocks you're seeing there.

 

Everything looks good. ;)




#4089555 AVGCart

Posted by flashjazzcat on Sat Aug 11, 2018 2:09 PM

But if not, are the upper two bits of the SIDE banking register implemented as per the description on pages 141-142 of this document?

http://www.virtualdu...ence Manual.pdf


#4089546 AVGCart

Posted by flashjazzcat on Sat Aug 11, 2018 1:45 PM

It sounds as if the cart suppression bit might not be implemented by AVG's SIDE emulation at all. I didn't yet have time to assemble the AVG cart I was kindly sent, so I'm speculating until then. ;)


#4089520 Ultimate 1MB, Incognito, 1088XEL and SIDE/SIDE2 Firmware Update Released

Posted by flashjazzcat on Sat Aug 11, 2018 12:47 PM

Forgot to respond to this the other day:

...but what does Incognito's "unlocked config." means? While you are running the BIOS?


Correct. The hardware register, primary configuration register and 'aux' register are writable following a system reset (including power-on) until the configuration is locked by setting D7 of the config register. From that point on, the configuration registers are completely inactive until the next time system reset unlocks them.
 

Also, I still have to pressing questions I could never answer so far:
 
1. I still see the "Run Diagnostics Cartridge" option on the BIOS... what cart?


No-one wrote one yet. Avery suggested he might write one a couple of years ago but I guess he has many more important things to do with his valuable time. :) Any diagnostic cartridge can be launched via this option, however.

2. In the FLASHABLE space (512K) there is a 16K slot called "Recovery OS". What exactly is supposed to be there?


No idea. I'm not even sure what that slot contains on my own Incognito or how that OS is made active.


#4089515 AVGCart

Posted by flashjazzcat on Sat Aug 11, 2018 12:39 PM

Anyone else has any idea? I've checked photos of Rapidus and U1MB and didn't see any polyfuse that'd explain that "cooldown" period.


My initial Rapidus testing (of one of the first production units some two years ago) turned into quite a saga, and the device was at the time characterised by differing behaviours depending on power-on time and temperature. Many stability issues have been addressed in the intervening time (and this remains an ongoing process, it seems), but I noticed this post in the U1MB firmware thread the other day which suggests the Rapidus core needs to be completely deactivated to allow some cartridges to function.

 

 

Hello, i updated my u1mb to new version and all looks very nice, but i have rapidus and i don't see option rapidus on/off.. where is it. It's important option, because give possibility to use cartriges with rapidus.. no conflict.. regards

 

The answer was to install the U1MB Rapidus plugin (for the new U1MB firmware), which allows deactivation of the Rapidus core in software. I'm not sure if that solution has been tried in this instance yet, but it's more convenient than constantly soldering and desoldering the Rapidus GND wire or having to wait five minutes for the machine to work again.




#4089476 Ultimate 1MB, Incognito, 1088XEL and SIDE/SIDE2 Firmware Update Released

Posted by flashjazzcat on Sat Aug 11, 2018 11:25 AM

There was no internal BASIC (nor any means of controlling ROMs) on the 400/800, so the OS won't support it.
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#4089337 Ultimate 1MB, Incognito, 1088XEL and SIDE/SIDE2 Firmware Update Released

Posted by flashjazzcat on Sat Aug 11, 2018 4:35 AM

The firmware is completely out of the picture once the operating system has booted (unless you have the PBI BIOS enabled and are experiencing issues with disk IO), so if you're getting random problems outside of the BIOS setup menu/loader, it's likely a hardware matter. I believe there are different PAL/NTSC versions of the 800 OS, so I'd recommend using the one appropriate for your system.

 

There are 16K padded builds of OS A/OS B floating around the forums. I can look this evening if you have no luck finding them.