sup8pdct

Still working through it slowly. A better schematic would help a little. James

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. James ATR800M.txt

There could be one of seversl things wrong. Pokey isn.t working properly, pia (same thing) or the chips and connectors need to be re seated. Getting replacemrnt chips isnt too hard. Reseating everything is easy and only costs a bit of time so is the first plsce to start. James

There was an upgrade for cassette used in eastern europe. But it required some hardware added to the csssette drive it self and i think a cable to a joystick port?. It could only be used on the xc cassette players only i think? James

Was refering to trouble you are having with the rana rom re DD. Maybe the xf551 code may give you a clue. Mcs48 is highlevel code compatiable with minor changes required. Binary level they arent. I have the one from bobpuff. Have already looked at that code and found something....... James

Mr martian. Maybe you could look at the xf551 double density stuff to see what is going on. Tho it is a different micro, they are supposed to be code compatiable. James

I had dissembled the atr8000 rom some time ago (64k ver) and found that rom was copied to ram then moved to high ram. It should be on my pc at home and will look at it again once i get back (sometime in dec). Z80 io space is seperate to ram space (ie no ram space is lost unlike 6502). James

Mac65 divides each binary into aprox 256 byte segments so for an 8k continous file, that is 32 segments. A continous file is what I am after for what I am doing. I am not after saving disk space. I have used m65 a lot and have the orignal manual, so i tend to stay with what i know how to drive. James

That one works, but i remember using one that went from the sparta command line? Cannot remember what it is callled?!!!?!! argggggghhhhh old age.......... and memory........ James

As topic says. I am trying to find any file that will do it. There is a program called streamliner from analog but cannot find it. No doubbt there are others and i am sure i had one. but due to memory loss (age,drinking etc) i cannot remember its name or where i put it. Can someone help?? Thanks in advance. James

Have just looked at the "XL" version and discovered that it has been slightly modifyed to run on either xl or 800. Ie they have added a bit of code at the end to take care of the illeagle jumps. What was written over has been moved to start of progam below memhigh as it is only used during init. I have a version here that has a small program appended to the end and patches synassember once loaded. Upshot is, both will work no matter what version of os is running. James

No you don't. you download the atr of synassembler XL v 4.0. It has a slightly modded version of dos 2.0s dup.sys. Also has an 800 version. http://www.theoldcomputer.com/roms/getfile.php?file=Li9BdGFyaS84Yml0L2FwcGxpY2F0aW9ucy9hdHIvU3luQXNzZW1ibGVyJTIwWEwlMjB2NC4wJTIwJTI4MTl4eCUyOSUyOFN5bmFwc2UlMjkuemlw. James

I have found this http://wiki.strotmann.de/wiki/Wiki.jsp?page=Synapse%20Assembler%20Manual Does it help any? James

I have the orignal source code. Will look into it when i get back. I do remember a timeout counter being set etc.. James

Maybe when emulator sees that irq are disabled, the pokey irq status bits arent updated. I havent tried the latest one. When i get back from my round aust trip, i will be able to once again play with my beloved hardware and try a few things. James

Yes there is. The aux.sys program from Superdos 5.1 allows you to copy files from dos 3 to a dos2 disk. Just dont expect superdos 5.1 to work on any emulator. ( I have tried many but not all). Seams emulators dont emulate pokey fully when it comes to serial i/o. James

All that matters is close to 9V ac at about 2A. A 810/1050 PS will work fine. The 50/60Hz factor doesn't matter in the slighest. James

On the main board, The main crystal will need to be swaped. There is a couple of bits near the video circuit that will also need to be swaped. One is the tall inductor. Cannot remember if anything else needs to be changed. Those bits are for the rf modulator. Swap only is you wish to use a tv. James

Atari had the 810 on the market first. Through some strange desicison, they never released the 815, tho everything was ready to go. So from then on, everything was limited to 128 byte sectors. The 1050 retained the 128 b sector limit for compatability reasons. No idea why they didnt do the whole DSDD thing. Maybe the $$$ factor? James

Are you sure the dup source is all there???? A quick look for dupdisk routine shows it is not listed. There is only one reference in the jump table... James

The "ntsc" rom is actually a stuffup (feature) of the xf551. The timing loop to recieve serial data on the drive needs 1 extra cycle to be added which is what the "pal" version does. However you will find the pal version will also work with ntsc consols. There is another error in the rom to do with setting up for formating a disk. It however isnt serious so is not a big issue. James

Ballblazer is 4 player? When i last looked, only 2 could play at once. James

The midimate and like is a very simple interface that has some buffering and that is about it. It also uses motor control i think to enable it and has a feedback on either proceed or interupt line to say i am here. Pokey does the rest, ie serial at 32,xxx baud. Custom serial software will need to be written to support that speed. Shouldnt be to hard once pokey audio frequency divisor for midi serial is worked out. James

so emulators cannot see when pokey registers are written to and take the opropate action??? again, someone will get it right one day

that is an emulator not doing a good job. someone will get it right one day. james