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On my Indus , The plugs with wires are from front to rear, J9, J12, J11 with the printed numbers on top. Each one is a 4 pin socket. Not sure if that will help you. James. I found the answer. There is a schematic for the indus gt on: http://atariwiki.strotmann.de/xwiki/bin/vi...s+GT+Schematics. J7, J8 and J9 are all switched on leads 3 and 4. Ron

I know Frogger had both a 16K and a 32K version. The 16K version had continous music playing removed and a couple of game elements removed. These were cassette and disk versions tho. I also know Zaxxon was another one that came in 2 versions. James

First thing I would do is to see what happens when you turn on the drive with the top removed and the front facing towards you. If the head moves towards you then away again, then you have some sort of logic problem. If it doesn't move at all, the problem is in the stepper motor area, either the 12V or the drive circutry. If the head only moves towards towards you or bounces when very close to the disk spindle, then the problem lays in the track 0 sensor area. See if you can manually move the head (with the drive turned off to make sure it isn't stuck). One big thing you may have picked up in the other theads is the capactors. replacing these may fix your problem. james

That is interesting. I have never had any problems with Mac65 and SDX. I cannot remember if I had 4.19 or not. I did however swap processors till I got a good one to run SDX, Rtime8, mac65 and mio all at once. I must say my mac65 is a special that I made that also has action,basicxl and basicxe. James

I have the manual for DDT that is part of Mac65. I wasn't aware of DDT with atari macro assembler. I can scan it if you wish. James

It is a shame that no other atari (or 3rd party) dos used the bad sector list the drive provides. How many 3rd party drives (including rom upgrades) provide a bad sector list? James

I think antic ran an artical similar to this (maybe the same) It changed the vtoc table so it wouldn't be write compatiable with normal dos 2, ie moved the bytes for the votc lower down and added to the end. This was done to get enough room to fit all the extra sectors on the vtoc. Dos 2.5 uses sector 1024 for the 2nd vtoc sector of a possiable 1040 on the disk. James

Yes please. Mine is PAL. James

I have one of those too. very handy. It uses the AC input to do the timing, so there are 2 versions, 50Hz and 60Hz. It shouldn't be to hard to build one. James

Yes, please! Any examples would be great. Thanks for that! here it is. Very much a hack. it copies the os rom to ram (XL) and modifys it a bit to be able to play music during SIO using the OS sio vector. Please note a lack of comments. It may not be the best code but it does work. James music_play.txt

I have actually done it many years ago. the music routine and data i borrowed from a game with 2 voices removed, and the sio loader i used was just a bit of setup then jumped to the os handler directly to handle the rest, ie not a published vector. bad part was it would only run on one OS version. I can did out the code if you like. James

I remember reading somewhere (long time ago) that parity was only used for the data frame, not the command frame. Tho I could be wrong. Can any one confirm this one way or the other? James

One thing I would try is to clean the edge connector on the XL with a normal eraser. geting one small enough to fit might be a bit hard. After 25+ years, the connector may have some dirt in the wrong spot. Connect/disconect several times may also help. James

It is nice to see that I am sometimes right in a round about kind of way. And said info is included in a Faq. Not bad for someone who failed english and it is my only language. Tip. When I used Atariwriter +, I put the spell checker data disk image on a MIO ramdisk and set it as D2:. Should see it fly through the text then. James

For the Blackbox, one uses the floppy format sub menu avilable when you press the menu button on the BB. There you can select the option of mydos or spartados. The SDX format command is good for this too but is quicker to press the button. As for the HDI, I have no idea. the SDX menu should work. James

Naah.. There were ALOT more issues with that design than power supplies... Most of them did eventually melt down if the rectifier diodes werent upgraded, but there were quite a few stability/funtionality issues as well.. You can get a real good idea of this by examining the difference between the build-spec of various serial numbered units.. But there were some inherant problems that never got worked out.. And some that only manifested themselves with certain combinations of other hardware.. Like Steve Said, Mike Gustafson Himself commented that he was surprised that it even worked.. I know that one. My first MIO (256K) was fine till I added a harddrive. $FF would appear randomly through the file, directory etc. Only way to get it reliable was to make the cable between comp and MIO 300mm long. I sent it back and asked for a 1meg one. Much better. MEtalGuy66 has seen a picture of it and he has said it is the best one he has seen and also the highest serial number unit. Only problem I had was getting a good 6502 to cope with all the upgrades and flaky rom just recently. James

Do you want to keep it as a file that can be loaded from dos or just a single bootable file per disk? If the former, there is a binary file loader in Superdos AUX.SYS that can use highspeed SIO to load the file and run it. I cannot remember, if the loader only sees a single file, it will load it straightaway or you have to select it from a menu regardless. This dos menu loader is good because it uses the first 3 sectors on the disk and the last 3 sectors of the directory for it self so it doesn't take any file space and it can be written after the disk has been filled. If you want the latter, then you may run into a problem if the file you want to load is longer then 32K, The os boot sector routine can only handle 128 byte sectors and can only load 256 sectors. Larger files will require a custom written boot loader unless the pc file of which you speak of does this. Both methods do have a problem if the file you want loaded overwrites the boot loaders ie games. The OS boot loader doesn't have this problem. Every boot disk has a 6 byte header on sector 1. Byte 1. normally $0 byte 2. number of sectors to load. bytes 3,4. address to load to starting with byte 1 bytes 5,6. run address The os jumps to Byte 7 for init routine which generally ends with CLC RTS James

They are for status leds. Led1 is for keyboard disable on (Ctl F1) and the 2nd is for international charactor set on (Ctl F4). The same code is used in the XL/XE but atari didn't add the keys or the leds. The 2 Leds are controlled from PortB. Thanks. I actually downloaded the manual to find out, since no one responded very quickly. They actually added some nice extra features to this machine. I particularly like the ability to turn off Antic via keystroke. Was this possible on the other machines by any means using key combinations? The only way I knew of was poking "559" with "0" directly in a program. None that I know of. If you are ok with pulling the XE/XE apart and with soldering 4 wires, you can make 4 push buttons work as the function keys. Of course, installing any os upgrade you will loose the function keys (as far as i am aware). Drilling holes in my top case to fit four buttons isn't what I would do. I used to know which positions on the keyboard connector to use, but it has been many years and my memory is somewhat fading. James

They are for status leds. Led1 is for keyboard disable on (Ctl F1) and the 2nd is for international charactor set on (Ctl F4). The same code is used in the XL/XE but atari didn't add the keys or the leds. The 2 Leds are controlled from PortB. James

The only real difference would be the deletion of 2 joystick ports in the XL and XE And reassigned to memory management duties. (2 leds on 1200XL) Only other thing is the lightpen input on the 400. it is only on joystick port 4. All others have the lightpen on all joyports. James

I still have heaps of floppies i havent used yet and lots that I have. they all are out in the shed that gets very hot and some times has very high humidity due to to water. ie treated very badly. The only ones I have real trouble with are Le Floppy. the magnetic coating comes right off leaving the depries on the head of the drive and a clear line on floppy it self. About 12 years ago, I copied all floppies to atr images except the copy protected ones. Some took several goes in 3 different drives before I got the whole lot. I broke out some brand new gestetner (nashua?) disks and they formated perfictaly and they would be 18 years old. James

No. the indus mech is NOT double sided capable. It does however have the Index hole detect and it doesn't have the door close switch. Otherwise they are very similar. James

Hope i can remember it all. 400 with 16K 800 with 48K 800 with 64K and axlon 256 upgrade 800xl with 256K rambo 800xl with superram 800xl 800xl 600xl 130xe 65xegs 1200XL 1090xl 1050 with happy 1050 with super archiver 1050 with supermax 810 with archiver 810 MIO BB with floppy board xf551 duel drive XF551 with update xf551 XDM801 star nx 1000 SIO2SD 1020 several tape drives 850 indus GT James

There is a capactor issue, but there can be other problems. Does the head move when powered up? If not, it sounds like a lack of 12v. if the head does move, then it would be a motor/ motor drive problem. The 12V problem can be linked to 2 of the large capactors and 2 diodes as well as a regulator. James

One option for the 3.5 drive is to get a XF551 and mod it. There are instructions and kits around to do this. tho this is only for 720K 2nd option would be to get a parrallel interface device that supports 3.5 drives. One such device is the BlackBox with floppy board. This will support 1.4 meg 3.5 drives. With USB stick and SD card interfaces avilable now, why would you want one? How easy is it to get 3.5 floppies today? cannot help with the RTC tho i do believe some people in Europe have done something with a SDX, RTC combo that is internal. James