repetto74

Hi Flashjazzcat, I am a little bit lost here. If you check the disk image in attachment all Dos files are in there. From the DOS 2.5 menu I start with the disk format option (I) and then I write DOS files on it (H). When calling back the directory (A) I do see a couple of files on the disk DOS.SYS DUP.SYS Is that good?

Hi Guys, Thanks a lot for your advices . I am really noob in ML programming so I have now two options : - I can use my real 600XL (upgraded to 64k) with a SIOD2SD reader and MAC/65 or Atari Assembler Cartridge if I want to play with this on a real hardware - Use Altirra emulation with Mac/65 or Atari Assembler Cart but I just need to fix how to correctly format a new disk as I have issues with it (always error 130 despite the fact the disk is formatted and DOS files written onto it) There is really no point for me in using advanced modern assembler as I have no experience. Better to start with what was available at that time and use the good ATARI ROOTS book to start with something

I do not have this Enhanced Disk option in Altirra. This is crap no way I can get this damn disk to work and always getting this 130 Error. I just do what is necessary. Loading the DOS disk than format a new disk in single density 256 bytes and then writing DOS files in it. I do see they are there with the A command but then into basic always getting the error. I have noted that also creating a new disk already formatted with DOS is not working (boot error on cold start). I have attached the new disk formatted with DOS 2.5. It will boot to the DOS menu but cannot save on it. If someone may try it with Altirra and let me know? DOS TEST DISK.atr

Hi 1050 I will try then to set up a new ED disk and check again if this will fix :-)

DrVenkman thanks for your explanation and this is exactly what I have when booting the new disk (think I have choose the double sided format). I will check the writing protection, I recall maybe having already tried this but will try later. Which setting should I use ? R/W? Many thanks

Hi flashjazzcat, What do you mean by booting DOS? What I want to do is to go to BASIC write down a program and then save it. If you mean booting directly the new formatted disk then yes disk will boot and I get to the DOS 2.5 menu. Exploring the new disk will give this : DOS.SYS DUP.SYS

Hi guys, I cannot get a new blank disk to work with Altirra 2.81. I am emulating the 800 XL and would like to have a formatted new disk but each time I create a new disk I cannot save on it (always having ERROR 130). Any idea? EDIT : ok Guys I am really DUMB. I forgot to copy Dos files on it!!! EDIT 2 : Nope I did copy Dos files on the disk and checked they are there but still getting ERROR 130 when saving a progam (save"d1:test.bas")

Hi Justin Ok noted :-). I will give this WUSDN a try. Anyway I may also use any window based assembler through the Wine platform which works pretty good on Mac OS X. Thanks a lot

H Guys, Many thanks to both of you for your advices :-). The 600 is modded to 64k. WUDSN is that a Window based assembler? Sorry I did not specify I am on MAC. Is there any Atari assembler for MAC OSX available? And thanks for redirecting me to ATARI ROOTS, have already heard about it :-) Rick

Hi Guys, I have a great interest in learning basics for machine language programming on the 6502. I own a real Atari 600XL but do you think it would be easier at least at the beginning to use an emulator? I am a noob and would like to know any books or publication on how to code ML for beginners on an XL computer. Also which assembler shall I use and how to compile the source code then? I know there are some threads on this matter already but there is a lot of information and I cannot dig out what would be essential for a good start. Many thanks Rick

Hi guys. Thanks a lot for pointing to Best Electronic but sorry I did not précisé I am located in Old Europe :-) and shipping cost from California are just too high. I will try to dig it out here in the continent

Hi guys Thanks to all of your for your intervention :-). I have figured out what was wrong. The IC delay module in U13 was the faulty one. I swapped it with the one coming from another board and all was back to business ! Where can I find this chip ? It looks this is a custom made one by Atari. Ref C060472-D. :-)

Well I have a spare of all main chips with me but I have tried to swap them all and had the same problem. Now I may try again one by one and see the result.

Hi Dakidski, Problem is that I have this also with the SIO2SD disconnected...

This is the kind of crash I have after a short period of time the machine is running :

I am dumb sorry I did not swapped back the OS hip I tested on another working board (which is giving same crashes) so I was turning on without it. Anyway I had this red screen in the past sometimes together with those garbled video crashes.

Ok now the fault has moved to a worst scenario. I have a death RED screen on power up. Any idea where to check?

Hi Rybags, Thanks for your suggestions. I may start thinking also that the OS rom is somehow corrupted and unstable. The PSU may be also the problem but the thing is that even when disconnecting the SIO2SD and power recycling I will still have the problem popping out. It is like an issue popping out after a short period of time from a cold power on and once it is there I need to cool down for a while before turning the computer on again.

Hi, I started having a lot of issues when using an SIO2SD reader with a 600XL with internal 64k mod. The machine is unstable and will at any random moment freeze and display garbled colored text and characters in a rolling pattern. A power cycle will set all back to normal for a short time before starting to freeze again. Now I assume the mod is correct as the memory test is passing green with no fault detected. I cannot recall which tutorial I followed for this mod but there are maybe some more. Anyway it was posted here on Atari Age. Is there any incompatibility I may not have been aware of concerning a 64k 600xL and any sd reader ?

Hi Flashjazzcat ! Million Thanks 😀

Sounds interesting :-). Is the binary available for burning it into the 16V8GAL?

I am having exactly the same problem with my 600XL!! I did the upgrade to 64k and was working really good for a few days then suddenly it started putting garbage characters on screen and then the same garbage as in the picture (with screen rolling up and down). I do have replaced both rams (already new as for used to mod the machine to 64k) with two new ones but no luck. In my case the freeze will pop up after a few minutes from cold power up. My rams are labelled 41464C-12 and were confirmed compatible. I have already swapped 64K RAMS/GTIA/ANTIC/CPU/PIA and POKEY with no luck. MMU runs very hot quickly (C061618 in U2) it may be suspicious but where I may find a replacement for it? I did not try to revert to the original 16K config, I may want to try but need then to dig out also the TTL marked 74LS51 in U16 as the leg has been broken during the mod and just a wire soldered now (cannot make this pin to contact the socket anymore). Would really like to fix this.

Again sole testing made which confirm the freeze pops up around 5 min after power up. If I leave the machine turned on then I will get this garbled screen where I can see text characters of graphic 2 mode. The ANTIC chip may have failed then. trim.3B7DB790-31AD-45B4-BA17-E282DD67DF0B.MOV

I did not precise that this is a 600xl with the 64k mod which was working properly.

Hi, My 600XL seems to randomly freeze when used with an SIO2SD reader. It can freeze while playing a game or when typing a Basic program. It does not seem to have an issue when used standalone. When freezing in Basic mode some strange patterns and characters may pop up. Here is some pictures of the failure. Note that on the RAM test I had a total freeze on first try then it went till the end but with a red square popping up. PSU is ok, output is normal. Now I made another Memory test and this time the last two blocks are red and the Mem test will crash. I noticed the crash seems to start more or less around a same amount of time after a cold power up of the machine (IC heating too much?). Now i would like to know which IC's are involved in Ram management. Which are the multiplexer positions on the board? edit : I opened the case to have a look inside and try to reseat all IC's. I noticed that one of the wiring used for the mod was in contact with a pin of one RAM chip and the insulation was melted. I may have caused a short circuit and hope I only damaged the RAM. The freeze is always popping out after a few minutes which may point to a IC malfunction due to overheat. Damned hope I did not screw the whole thing up!