YAGRS Posted February 18, 2013 Share Posted February 18, 2013 I have a feeling this is somewhat of a stupid question, but I haven't been able to figure this out. I loaded a BASIC cart, hoping that it would tell me how much RAM I had, but it did not. The reason I'm asking is that I was considering purchasing a memory expansion kit from Best, but I noticed that the expansion comes with jumper wires that need to be soldered to the bottom of the motherboard. I had my Atari 400 apart a while ago, and I noticed that it currently has red wires like those that come with the memory expansion soldered to the bottom of the motherboard, which makes me wonder if the expansion has been installed. I've had this Atari 400 for years (my dad picked it up at a thrift store), and I just never considered that the previous owner might have expanded the RAM. So, does anyone know if there is a way to get the RAM to display onscreen? Do I have to take the 400 apart and look at the boards to tell? Quote Link to comment Share on other sites More sharing options...
Caterpiggle Posted February 18, 2013 Share Posted February 18, 2013 ?FRE(0) It will tell you how many ram you have. Whatever the number given you the results and divided by 1024 (bytes). Of course, BASIC Cartridge take up 8 K = 8192 bytes + left over.. 1 Quote Link to comment Share on other sites More sharing options...
YAGRS Posted February 18, 2013 Author Share Posted February 18, 2013 I got 37902, so I guess it does have the RAM expansion. Thanks for the quick reply! Quote Link to comment Share on other sites More sharing options...
Caterpiggle Posted February 18, 2013 Share Posted February 18, 2013 My guts tell me your ram has 48 K RAM. Quote Link to comment Share on other sites More sharing options...
russg Posted February 19, 2013 Share Posted February 19, 2013 (edited) I got 37902, so I guess it does have the RAM expansion. Thanks for the quick reply! Here's one that will tell you what you have. Or maybe easier on an .ATR SHORTEST.zip MYDOS453.zip Edited February 19, 2013 by russg Quote Link to comment Share on other sites More sharing options...
Scooter83 Posted November 16, 2020 Share Posted November 16, 2020 My 400 comes up 13315 or 13k I guess it's a 16m with some bad ram ? Quote Link to comment Share on other sites More sharing options...
zzip Posted November 16, 2020 Share Posted November 16, 2020 5 minutes ago, Scooter83 said: My 400 comes up 13315 or 13k I guess it's a 16m with some bad ram ? That's how much is available for BASIC, a few K is used for system overhead, 13K in BASIC is about right for a 16K Atari system Quote Link to comment Share on other sites More sharing options...
Scooter83 Posted November 16, 2020 Share Posted November 16, 2020 Ah ok. I thought for some reason the 400 used like 1.5 k of ram for some reason similar to a vic 20. 3k was more than I was expecting. Quote Link to comment Share on other sites More sharing options...
ClausB Posted November 17, 2020 Share Posted November 17, 2020 1K is text screen RAM, double that of v20. 2K for system RAM. Your 400 has a full OS in ROM, more sophisticated than the v20 kernal. 1 Quote Link to comment Share on other sites More sharing options...
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