Nezgar

http://trub.atari8.info/index.php?ref=indus_cpm_en

Now that I look back, I do see he took over 2 weeks to reply to me lol.

Happy Warp DOS is a modified version of DOS 2.0S that loads in a high-speed SIO handler at the expense of some free RAM. Theres various ways to load the module and some documentation on the Happy disks. Re DOS 2.6's and 2.8's - probably best to stay away from those... 2.6 is a hack that will make ED disks that are incompatible with 2.5, or a leaked predecessor of 2.0S According to: https://www.atariarchives.org/creativeatari/Atari_DOS.php "Fortunately, most of the DOS 1 disks have disappeared, leaving users with an improved operating system which has eliminated many of the bugs. Alas, while Atari was working on the bugs, they "released" several preliminary DOS 2 versions, called DOS 2.4, 2.5, 2.8, and 2.S, all of which have bugs in them. Don't use them." And another according to Wikipedia: https://en.wikipedia.org/wiki/Atari_DOS#FMS "DOS 2.6 - Someone in the Atari hacker community modified DOS 2.0 to add a few features and allow the use of dual density disk drives, with the "look and feel" of DOS 2.0. One new feature added was "RADIX", which one could use to translate hexadecimal numbers to base 10 or base 10 to hex."

SpartaDOS 3.2G is definitely compatible with Atari DOS 2 disks. It can read/write files on SD/DD disks that are already formatted. The utility XINIT.COM will format new disks in various densities including Single Sided Double Density, but will lay down a SpartaDOS directory structure. To format an a disk with an AtariDOS directory structure with SpartaDOS 3.2, use the AINIT.COM utility. Notes about these 2 commands are also in the SDCS Manual: http://www.atarimania.com/documents/atari-8bit-spartados-construction-set-owners-manual.pdf And just to muddy things here for fun... technically DOS 2.0S is capable of running on DD disks I remember Bob wooley posted a while back about formatting a DD AtariDos 2.0 disk with SpartaDOS, then boot DOS 2.0S, change to and read a directory or something on the DD disk, then and format & write DOS files to the disk. Result is a bootable DD disk with DOS 2.0S on it but of course it's missing the density change menu option most DD modified versions of DOS 2 had... I'll have to try this... Here it is: http://atariage.com/forums/topic/209833-format-sdx-stock-1050-weird-bug/?p=2713003 Before I fell in love with SpartaDOS, I used Smart DOS, TOP-DOS for Double Density disks, but I don't recall those doing UltraSpeed out of the box without hacks.

Hmm re-reading that, I have to re-check if OS #3 works when DIP 3_2 set to ON (OS on sys-check) with main PCB OS also with a8diag1-2.rom - I think that worked. Edit: yes it does. With DIP 3_2 in either mode, but only if onboard OS matches the Sys-check boards OS.

OK so i made a new Sys-Check flash replacing $10000-$13FFF and $14000-$17FFF regions (Firmware 3+Repeat) with a8diag1-2.rom. Selecting 3rd OS on Sys-Check doesn't work Just coloured Green or Brown screen. The other 3 selectable OS's continue to work. I programmed the same 16KB file to a 27C128 and it works just fine when replacing the OS ROM on the system board in a stock 800XL. Some other combinations... With a8diag1-2 27C128 EPROM in the 800XL ROM socket, and Sys-Check D it works with Sys-Check DIP 3_1 on the mode block is set to OFF (64KB of main memory on Atari PCB is used), and DIP 3_2 set to OFF (OS on Atari PCB is used). If the 64KB is provided by Sys-Check, only a blank screen results. Oh wait here.... With Sys-Check set to: DIP 3_1 on the mode block is set to OFF (64KB of main memory on Atari PCB is used) DIP 3_2 set to OFF (OS on Atari PCB is used) and Sys-Check OS set to #3 programmed with a8diag1-2.rom and Atari PCB OS socket ALSO containing 27C178 programmed with a8diag1-2.rom it works! With SysCheck OS set to #3 programmed with a8diag1-2.rom and Atari PCB OS socket containing stock OS ROM it does NOT work. Maybe the $D406 register used by Sys-Check for bank switching is at play here, Sys-Check modes getting changed by writes to it? From page 9 of the Sys-Check Manual: Bit 0: When 0, then the SRAM on Sys-Check´s PCB is active. When 1, then the RAM on the XL/XE mainboard will be accessed Bit 1: When 0, then the ROM or EPROM on Sys-Check´s PCB is selected, otherwise the ROM or EPROM located on the XL/XE mainboard. Bit 2: Address line A14 to Sys-Check´s ROM/EPROM socket (see below) Bits 3...7: Reserved - no function at this time

B&C ComputerVisions has CX-87 too, here's the line item from an invoice of mine from B&C last month: CAA003 CABLE MODEM TO 850 - $19.95

If you were to make your own cable.. Pinout of 850 RS-232 ports in 850 Owners Manual, link directly to page: http://www.jsobola.atari8.info/dereatari/literatdere/850om.pdf#page=84 Pinout of ICD P:R: Connection manual, RS-232 port to modem cable diagram, direct link to page: http://blog.3b2.sk/igi/file.axd?file=2012%2f7%2fP+R+Connection+-+Owners+Manual.pdf#page=52 The ICD MIO also uses the same 'Atari Standard' pinout of the 850 and P:R: Connection. Gozar is correct from what I understand. The serial & parallel port pinouts we call standard today, were based on the original IBM-PC model 5150, released in 1982, a couple years after the 850.

Thanks, yeah I forgot about the flash tool. But tf_hh did reply to me and explained the flash layout, if I do it manually: $00000-$03FFF - Blank (or repeat of Firmware 1) $04000-$07FFF - Firmware 1 $08000-$0BFFF - Blank (or repeat of Firmware 2) $0C000-$0FFFF - Firmware 2 $10000-$13FFF - Blank (or repeat of Firmware 3) $14000-$17FFF - Firmware 3 $18000-$1BFFF - Blank (or repeat of Firmware 4) $1C000-$1FFFF - Firmware 4 I will try to give this a go tonight.

Great utility! referred to it many times. Have you ever considered also incorporating well known 3rd party OS's into the database? ie Omniview XL/XE, Omnimon, XL FIX, BOSS XL etc or for identifying popular OS patches, ie Hias' SIO patch, fast math pack, BASIC disabled, modified character sets, etc.

I've never actually seriously looked into flashing the OS's in my Sys-Check before, but now that I'm back at my Atari, looking at mine its a SST39SF010A flash chip (1Mbit / 128KB) in a 40pin DIP. Even better, my TL866 supports that, so I was able to dump it to a 128KB file, and should be able to reprogram it at ease. Since there are 4 selectable 'OS'es in the SysCheck, 4x16KB = only 64KB, but it appears to be more than 64KB of data in the dump (ie it's not just 1/2 blank), so its not immediately apparent to me where to replace say, the QMEG OS with Shoestring's tester. I've PM'd tf_hh asking him in case he's not watching this thread.

You could get RGB output from the Atari with a Sophia board http://atariki.krap.pl/index.php/Sophia I personally have a Sony SSM-14N1U. Inputs for S-Video or Composite, no RGB.

Looks like it has 2 composite video inputs (A/B) and a single RGB input. no S-Video. Will probably be just fine. NTSC artifacting should be fine with Composite input. BNC to RCA adapters are easy to find... ie: 2 with free shipping from China for less than $1 https://www.ebay.com/itm/183357486730/

xrbrevin, I just wanted to say thanks for posting your detailed pictures of the 8K PCB mods! I was thinking of doing this with a go4retro adapter board, but I'm pretty sure that would not fit inside the case. Your pictures will make it easy to do this without the adapter board, looking forward to trying this out.

Yeah... I put an order into Bruce last month, quoting a bunch of stuff from his price lists on the website.. He was able to accommodate my requests, but he indicated he was really overloaded and his website was way out of date, which is why removed all the items from his website. He still has lots of stuff, so I guess its e-mail only for now to ask what he has .. Anyway, here's the line items with prices I paid for EPROM PCB CARTs straight from my invoice: PRA062 PCB CART board 16K for EPROMs W/SOCK 2-2764s - $8.00 PRA065 PCB CART board 8K for EPROMs W/SOCK - $9.00

Another site I came across selling 410 belt kits: https://console5.com/store/atari-410-program-recorder-cassette-player-4-piece-belt-kit.html

Before I was 'enlightened' by SpartaDOS X, I was a fan of TOP-DOS, it has some of the configurability options of MyDOS. Also, Smart-DOS might be a simpler jump for someone familiar with a DOS 2.0 type environment. But SpartaDOS with the UltraSpeed SIO driver really makes the Happy fly (3x faster SIO transfer rate). I can't remember if TOP-DOS had an UltraSpeed driver... But much less complicated to format a DD disk than with MyDOS. You probably noticed that the Happy software sector copier can read/write to the happy drive very fast, but I think that utlilty still reads/writes from an SIO2PC at standard speed. UltraSpeed disk copying from SIO2PC based disk to a physical disk also with UltraSpeed can be done with various Sector Copiers, my favourite is MyCopyR. Check this post for downloads of sector copiers, including MyCopyR http://atariage.com/forums/topic/279557-how-do-i-make-a-copy-of-a-non-dos-floppy-image/?p=4044532

Definitely not for the recycle bin. Worst case, there are probably people out there for instance with working system boards without cases... And most of the chips on your board may be good, useful in other systems, but determining that requires testing each in a known working machine... They don't make these parts anymore! Hang in there a bit more here. Whereabouts in the world are you? There may be someone near you who could look at it in person. I'm also curious about MrMartian's suggestion about trying to replace the MMU.

If you still use the RF output, the shield *may* may help keep the picture noise free. you'll have to evaluate the difference. If you use the monitor output, you probably won't notice any difference. Small mods I have just cut a hole in the top shield, but my current 800XL project has too many mods I'll probably ditch the top shield entirely...

As per my August 23 post, FileManager+ added "sophisticated features such as field totaling"

I found mine was really only 128MB usable, common for counterfeit cards. Anything beyond that will be lost. I was able to repartition it to about 110MB which made it usable, but too small for most purposes... Regardless, it was good enough as a pack-in.

Video issues aside, if you just want confirmation the system 'is alive' - connect a disk drive with a bootable disk, and see if the drive springs to life when the system is powered up.

Wow neat, don't think I've ever seen a real axlon that big before. Anyone know if 1MB was originally available from Axlon themselves, or was it a mod? That would have made an 800 with SDX a pretty formidable competitor to upgraded XL's and XE's at the time. I also wonder how much max Axlon RAM the original SDX 4.1/4.2 supported.

I have a 65XE keyboard with a broken Esc key. It constantly registers that key pressed unless I manually pull up the remains of the bottom of the key. Hopefully a little plastic cement can fix that one. But maybe something is physically broken or cracked with your shift key? May be worth a disassemble of the keyboard to take a look.

Sorry, yes it is a 120V supply... some previous posts that also looked like 120V stuff threw me off.