sup8pdct

it wont work then. rf out needs to go to a rf input, not a video input. james

i have been told a long time ago thar the 6x21 has an extra buffer on the 2 8bit ports so it can drive more loads. otherwise they are the same.

one minor thing to concider is that a light pen or gun will only work in port 4 on the 400. no idea why this was done.there are schematics getting around that show this. this will exclude almost everything that uses those devices as they will need to be in port 1 . james

You can us it to do file transferes to another computer with a cross over cable and apropate software both ends. or talk to a modem to test/go online. James

the KLF did james

Is that what there called?.... i never knew so i called it mud................. james

one other susgestion itcould be (at least here in aus) is a port for an eprom burner. either a small program or a built in monintor type program (called John Nichalls monintor) that could use hardware made from a magazine artical described in the early 80s it was slow but worked well. plug shown was wired directly to joystick ports. james

i will precomit to one. due to our trip, iwont be able to pay for it till next year james

Don't forget that port 4 is setup for a teletype printer. Anyone have one of those????? James

I know of 2 versions of frogger. 16K (cassette) and 32K (disk) version. The 32k version playes music throughout and has a couple of extra features during gameplay. James

i always thought the atr 8000 supported the percom block. how else can it support the wide range of drives ?? easy way to check is to get a program that reads and displays percom block data from the ATR. james

Revieved mine today, unfortunatily i must wait a year before i can install and play with it. We are about go round australia and there is no room for beloved atari 800 So be prepaired for questions in a years time...... James

Unfortunately, they have now been packed away. We are doing the Block (going around Australia) for a year so house is all packed up and will be rented out. James

The books have been packed away now and won't be able to look at them for a year. Glad most stuff has been caught. James

tried it today. discovered keyboard input doesnt work properly. real pain when trying to enter name for plantery defence high score list. could only enter numbers or period. ended up with name of 8888. cannot load files from disk etc. why??? james

there is a small diference near line 5782 there are 2 missing lines around line 404. RevB has imask and jveck

Not sure if posted before, but here are some tech bulletins I found. more pages but doesn't show much Some interesting 810 stuff Do have more if people would like to see them. James

Found my rev B source listing It too is an orignal or a very good photocopy. Here is a page from it When compaired to same place in rev A Yes, Rev B does list Palflg as one of the 1st lines. Other then that, not very much different from rev A as far as the opening page is concerned. James

That one is rev A. I do have a rev B somewhere. Also DUP source listing for dos 2. James

Look at what I found. It looks very much like an orignal. It is slightly different to yours tho. James

Some 20 odd years ago, I modded the XL os to enable the 400/800 nmi reset. I just had to wipe out the id and date bytes at the begining of the rom and make small change to how pointer was set up. Don't know if i still have that file. James

To read ibm format disks, You will need an aftermarket drive such as the toms 720 or BB floppy board. Atari drives will need to be modified. EG 1050 will will need happy or any other upgrade that can be programmed from the console or any upgrade that has the ability to do so Xf551 will need css upgrade or any other upgrade that can be told to read the 2nd half of the 512 byte sector. James

WOW!!!!!!!!!!!!!!!!!!! James

What do you mean by screw down cartridge door? Is there a screw that has to be undone just to put in a cartridge? The 400 and 800 both have a leaver type clip, pull it towards keyboard and the door pops open. The power part is a design feature. It cuts power so a cart can be inserted. The 800 had an extra part that covered the rom/ram cards. Depending on when it was manufactured, it either had 2 plastic knobs that turned to release or was screwed down. The later ones was sold with full 48K so didn't need the plastic clips. earlier ones were sold with varying amounts of ram usually is 8K increments. The 400 has no such feature. James

Wow. never knew about this. Wounder if the maker will release schematics etc of the xl setup? James