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Posted Tue Jun 21, 2011 10:00 AM
Posted Tue Jun 21, 2011 2:57 PM
Posted Mon Jul 4, 2011 11:01 PM
Posted Tue Jul 5, 2011 6:01 AM
Can someone explain what this does or was used as? The info I'm finding is somewhat vague.
Posted Tue Jul 5, 2011 3:38 PM
Posted Tue Jul 5, 2011 4:17 PM
Posted Tue Jul 5, 2011 4:50 PM
Well, if someone could have afforded one of those boxes, that someone surely could have added any other additional equipment to the setup, too... lol.
UN*XCoffee928, i am gonna guess you never owned one... i would have rathered a couple XF551's and a P:R:Connection instead...
the ATR-8000 doesnt support any kind of I/O beyond 1x, doesnt support 'Dual Density', and had compatibility issues with alot of original games with copy protection (especially EA games), all that doesnt really out weigh the ability to use 5.25" 720K floppy drives, or 3.5" 720k floppy drives.
then in CP/M you have the issue of a 'scrolling 40 column window, in a 80 column screen', or choose the flyspeck 3 font for 80 columns on screen at once...
honestly, best thing it was suited for was large amounts of storage before the Supra HDI was released, as you could put four 720k drives on it for 2.88M of storage (or 4.8Mb with four 8" drives)...
but overall, damn glad i did (and still ) own mine :')
Posted Tue Jul 5, 2011 7:14 PM
Posted Tue Jul 5, 2011 7:50 PM
Posted Sat Nov 9, 2013 3:57 PM
I used to use one with four floppy drives...two 360K and two 720K drives (all 5.25"). Later I made a cable to connect some Atari ST 3.5" 720K floppy drives to it. I used it to run the BBS for the West Los Angeles Atari User's Group BBS.
Actually, I still have the ATR 8000 in a box somewhere.
Posted Sat Nov 9, 2013 9:00 PM
Posted Wed Nov 20, 2013 5:09 PM
I have the disks, but no documentation. I had to figure everything out back then. Yes, mine has CP/M capability and 80 columns.
Posted Wed Nov 20, 2013 5:32 PM
The ATR8000 would continue to be a useful device if someone had a detailed memory map for it so we could transplant some of the highspeed RAMCharger Z80 code from the Indus into it. It has all the possibilities of being screaming fast as a disk interface. I wish I still had mine. It quit working years ago, and I never took the time to troubleshoot it. It is probably gone, but I will try to find it next time I go to my old house.
I have also seen some HD interfaces that sit under the Z80, so that may also be a possibility. There is plenty of space inside the ATR for a small HD.
Posted Thu Nov 21, 2013 1:54 AM
Posted Thu Nov 21, 2013 2:05 PM
That would be great if you have it I just now (as I am typing) had a thought... I wonder if there is some Z80 embedded type of "ATR8000 on a Chip" that would fit in a small package about the size of a P:R: Connection with a USB port for hard/floppy drives...
Posted Thu Nov 28, 2013 1:25 AM
Here is a listing that I have worked on/out so far.
It is a bit complex when it comes to interrupts and sending/receiving on sio buss.
Schematics I have doesn't show what U52 is and page 3 has been chopped off so cannot workout what some ports do.
My atr is still locked away so cannot get at it till at least Christmas. Have fun reading it.
Posted Thu Nov 28, 2013 12:38 PM
Thanks, I'll look at it.
Posted Thu Nov 28, 2013 7:41 PM
Posted Fri Nov 29, 2013 3:15 AM
Still working through it slowly. A better schematic would help a little.
Posted Mon Dec 2, 2013 7:04 PM
Have found a few interesting things.
It should be possible for those with cpm disks to have them backed up on to Atari disks stored as files on floppy images, not as an atr unto it self. The ATR8000 has a Z device that has 4 commands. Set, Read, Write and Go. Read and write can only send/ receive 256 bytes at a time. A small Z80 program can be written to read any sector on a 512 byte sector format disk and transfer it over to the atari. The reverse is also true.
The tricky bit is to format a disk for 512 byte sectors to recreate the CP/M disks.
From here. http://www.gaby.de/sysdisk.htm
I have found some teledisk copies (amongst heaps of others) of the atr system disks but they seam to be corrupted when i use TD02IMD to convert them if they convert in the first place. Lucky there is a zip file that has some com files, one of which is a format program. I also noted there is a disk with source of the bios (CP/M?) but it doesn't seam to be all there. It says 1024 byte sectors!!?? Should be 512??
The ATR manual has helped despite some typos.
Can post what i have done so far if requested.
Still needs work but the basic workings should be discernible.
Edited by sup8pdct, Mon Dec 2, 2013 7:08 PM.
Posted Tue Dec 3, 2013 6:38 PM
There is commented source available somewhere, but I don't remember where it is. I found my copy and hacked it slightly so that it will create the ROM binary file. It is interesting to note there are some monitor functions commented out in the source that is not in the production release. Apologies for the ugly hacks in globals.mac and rom.mac, but it does build!
I found the pasmo Z80 assembler (http://pasmo.speccy.org) was closest to the syntax that was used to build it originally. I used version 0.6.0.20070113.0 with the following switches:
pasmo --bin --nocase rom.mac atr8000.rom
This will create the atr8000.rom file which is an exact match to the v3.02 ROM that exists in my ATR8000.
Hopefully someone can take this and do something useful with it.
Posted Fri Dec 6, 2013 1:11 AM
Posted Thu Nov 9, 2017 3:31 PM
Rather than interfacing these to an Atari (as folks stated, it's dated) I'd love to play around with one using an Arduino. All this old micro stuff, on Arduinos lol. Atari did the 8 bits right by making all SIO peripherals serial devices. (Believe it or not, you can't read/write floppies with an Arduino, you can only drive the motor for sound effects).
Back in the day I longed for one of these, as the 8" disks had massive capacity (and CP/M was very interesting.... Was one of my favorite emulators on the Atari ST... Loads of free utils with source code and free compilers If I remember).
For kicks, price out an 8" drive on ebay.
I have two ATR 8000 boxes with 64KB handed down from my mentor in the 1980s. They ran the disk drives , modem and printer for the Action Annex BBS in Vancouver, WA. They were trick devices considering the alternative of hanging a daisy chain of SIO devices to do the same thing. There is a web site that has schematics and the ATR manual can be found online. The guy is in Bratislavia and documented more about all the disk drives in one blog than ever seen before.
http://blog.3b2.sk/igi/post/ATR-8000.aspx All sorts of goodies on this site.
My current problem resurrecting them is the power supply design was not the best.
The 22 VAC transformer and it's so called bridge filtercap/regulation worked, albeit it was not designed for 20 years of operation. It did last 8 years for the BBS.
One of the machines worked and the other has logic gates going from a probe ,but is not communicating on the sio port anymore. I patched in +12V and +5 from a PC supply and got one working for about an hour.
Why would I want to wake up this bit of coolness from the BBS world?
I was gifted 400 floppies of double sided, double density format disks with probably 1000-2000 MIDI files typed in by my mentor's wife. They are unique and copies of public domain songs in MIDI format that can still be played on todays synthesizers or your emulated ones on the PC. Two of the MIDI files ended up as demo files on the Windows 95 CDROM release my Microsoft. Bill Gates used to visit the BBS and download them.
I have the actual drives used to write the disks, about 5-6 5.5.25" drives, so I know alignment issues won't be a problem.
I'm leery of trying to just buy a XF551 drive and take my chances losing data.
So, anyone an expert on finding glitches on a truly neat board? All the chips are labeled on the board. It needs sockets.
I have a spare board with eproms that read, one spare z-80 and likely just need to xray the board and find the short in it. The ram was recycled from some other project and was installed. I can see where someone has used the 4264s with wire wrap on another Atari 800. The ram bank and the z-80 went thermal and quit.
I even tried putting back in the stock 16KB ram and set the junmpers to see if that would get it working to no avail.
I never really got into using CP/M for an OS, as I was chasing IBM PC sales and programming after 1986 or so.
btw saw this other answer on this forum about where to locate the cp/m disks, images and tools.
For those who are still looking for ATR-8000 CP/M system disks, I found them here: http://www.retroarch...tari/index.html
Link for other CP/M bootdisks: http://www.retroarchive.org/maslin/
Here is all of Don Maslin's stuff: http://www.classiccm...oftware/maslin/
You need an old MS-DOS machine with a 360K floppy drive (and a good controller), and the TeleDisk program here: http://www.classiccm...06/teledisk.htm
Hope this helps.
Anyone spare a true DSDD drive for a loan or know where I can get the controller parts cheap?
I am also looking into an ISA IBM pc floppy controller of the vintage with the use of the atarisd.exe app. which might not read dsdd anyway.
Edited by mechanerd, Thu Nov 9, 2017 3:34 PM.
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