19rsn007

it looks good but plays like crap. I owned this gameand was really bummed out by playing it. back then, I had a snes and genesis which had better version. I liked the SNES version better cause of the sound.

hmm too bad shipping to holland will be expensive i guess.

what's your location Fred? I would like to pick up some games (tapes or cartridges) for my recently aquired and repaired 800XL

where are you from? And what are the prices?

the 2 inch drop didn't make ik any better. Not worse either. Think I'm just gonna take out the TOS chips and ask my friend (that had stacks of ST's for parts) if I can pick one at his place and test it with my TOS chips to see if it works

Hey people!! I did what marius said, and the atari booted to basic. after that I took out 1 of the replacement IC's Fox-1 sold me and placed the original ic's back 1 at a time... found out 2 of them were busted. After getiing it to boot to basic, I found out the atari also had a keyboard problem. I mailed Mr.Atari and he took a look at it today............the atari is fully repaired now Can't wait to get it back home and play some bubble trouble

ok, but should it be like that when it was connected to an official atari st monitor (the high res monochrome one)

hey people Lately I've not had any luck with atari computers. I've just picked up a power supply for my recently given AtariST 520. It came with a composite cable, but somehow all it gives my is a jumpy image (like it's out of sync) So tonight I took it to a friend of mine who had an AtariST monitor which is working fine on his 1040ST. We hooked it up to get it going, but the picture is way out of sync! Same goes when I try to hook it up via RF......no good signal. What could be going on with this ST?? I'd love to get it working, cause I never had an ST and I want to see what an ST can do.

Where are you from? I am kind of interessted in this.

looked at pinouts and talking to Fox-1 / mnx, learned me that the pinouts on the chips are the same besides the A8 line, and my XL board allready has the a8 tied to GND in the board (if I recall right), so I think I can just tick the in the sockets, right ? I will Piggyack them first just to be sure there is just 1 broken IC.

I'll just have to wait till Fox-1 / mnx's package comes in the mail next week. too bad.... btw. will the 256 x1 work next to the 64 x1 or will I have to replace them all with 256 x1 ? If it works next to eachother I might just replace the busted one that's in my atari now and lay the others aside in case another one breaks Just checked the voltages coming from the power supply again and the are right. Also checked the chip voltages when the atari was on, and they are perfectly fine...so the RAM didn't die from bad voltages I guess

I don't think it will work... think it's 4 bits

would M5M4256P be comatible. I have some of them here...

will these work in my 800xl: http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5574883395&toolid=10001&campid=5336500554&customid=&mpre=http%3A%2F%2Fwww.ebay.nl%2Fitm%2FM5K4164ANP-12-Manu-MITSUBIS-Encapsulation-DIP-16-65-536-BIT-DYNAMIC-RAM-%2F120920877526%3Fpt%3DLH_DefaultDomain_0%26hash%3Ditem1c277229d6 or thes http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5574883395&toolid=10001&campid=5336500554&customid=&mpre=http%3A%2F%2Fwww.ebay.nl%2Fitm%2FMCM4164BP15-Ram-IC-16PIN-DIP-%2F280929561860%3Fpt%3DUK_Sound_Vision_Other%26hash%3Ditem4168b4ed04 If so, I might be ordering 8 of them.

I just mailed the abbuc guys, since they offer repairs. I also mailed sandra to see if she happens to know if sijmen can do the repair or send me the chips so I can jam them into my 800xl and get it to play again. Where is the JHV and on what day ?

Hey Mathy, you live in holland yourself I see..... Man I was really looking forward to playing my atari 800XL. I heard C64 ram was compatible, so I rushed up the stairs to get my c64c, but was really disappointed to see other ramchips (and only 2 of them) in my c64C the ones in my C64C read M4164-12 AND HAVE ABOUT 2 LEGS MORE... My guess is they will not work next to the ones in my atari, and they only thing i could do is replace them all... but I think some major rewire work needs to be done get them working.

Hey people, I just picked up an atari 800XL which clearly has bad ram (booting in ram test and showing a lot of red blocks) The chips in there are marked MT 4264-15 and there are 8 of em. I don't have replacement chips, but would really love to get it working again. Anyone know where to get the replacement chips (should I order 8 and just replace them all...just in case ?) I live in holland, so a place near me would be great. the chips are on sockets btw. I measured the PSU, and that's OK

btw...another question. roms I download are in .a26 format. Can I burn them directly on my rom, or must I convert them to bin first?

I know at least River Raid, Pac-Man and Demon Attack are gonna be on there

that's what I thought as well.....damn it's hard to choose!!

another silly queastion. I know I am limited to using 4k games...but how many games can I put on my multicart using a 27c256 chip?

Sorry, edit button was gone. I just got hold of a handdrawn scematic of someone that did the exact same thing I want to do. So with logic inverter and dipswitches I'l digitalize it (draw it out on my pc) and post it here

On digitpress there's a schematic of the single chip atari junior. (On the main page select: Library > Tech Docs > Atari VCS/2600 > Atari 2100 "JAN" single chip). The console has an empty slot for an optional built in game and you'll find the pinout for atari 2k/4k mask rom in that schematic. Pin 20 and 21 are chip enable pins (active high). They are both used in case of a console with built in game, but only one is needed on a cartridge, so the other one is just connected to +5V. According to that schematic, 2k roms have a third chip select line on pin 18. so uhm whn I use an rom like the 27c256 (32k), fill it up with games (4k games), all I have to do is: 1> connect data lines d0 to d7 of the rom to d0 to d7 of the pcb 2> connect a1 to a11 of the rom to a1 to a11 of the pcb 3> connect +5v and gnd of the pcb to +5v and gnd of my rom (might be smart to put an 0.1uf cap to it?) from there on i'm stuck...never worked a logic inverter before...I'll be back once I found out how a logic inverter works

The descriptions are correct. Check the data sheet for the pin numbers to verify. perfect...so now all I need to do is connect the right pin of my eep or eprom to the right pin hole of the board and if needed use a hexinverter and some dipswitches and I can a 4k-games containing multicart

Ok so I figured it out I guess.... pin 24 is VCC (supply voltage), pin 12 is VSS (ground) and the other +5V connected pin (pin 21) is VPP (Program supply). Is that right?