[Coco] 64k memory check

[Bill Pierce]

I'm aware of the rom/ram conversion technique as I used it often with my old Coco 2. I don't have a drive hooked up yet and was really looking for something I could do from the keyboard.
I'll probably hook my cassette to PC cable up tonight and try loading HDBDOS in as it will copy rom to ram and save HDBDOS to high memory, so if it boots, then it's 64k.
If it's 64k, then I'll be booting NitrOS9 Level 1 from DriveWire by evening :-)
If it's a 32k machine, I'll be looking for the upgrade. But, if I'm not mistaken, the "F" boards only came in 16k & 64k. They had by then done away with the 32k machines. This is the last in the Coco 1 series and next were the 1st Coco 2s. They made several versions of the "F" boards including the White ones with the "melted" keyboards. This one is apparently one of the last gray models with the chicklet keys.

Bill Pierce
My Music from the Tandy/Radio Shack Color Computer 2 & 3
https://sites.google.com/site/dabarnstudio/
Co-Webmaster of The TRS-80 Color Computer Archive
http://www.colorcomputerarchive.com/
Co-Contributor, Co-Editor for CocoPedia
http://www.cocopedia.com/wiki/index.php/Main_Page
E-Mail: ooogalapasooo at aol.com




-----Original Message-----
From: T. Franklin <tim at franklinlabs.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Tue, May 21, 2013 6:59 pm
Subject: Re: [Coco] 64k memory check


iff memory serve (pun intended), that can only be done via a machine language 
routine. The problem is that those coco's had the upper 32k mapped into the same 
spot as ROM and the interrupts need to be disabled. The rom switches off and the 
poke command would not be operable any more. There was a small binary app that 
copied thr ROM to ram but it didn't actually test the upper 32K of memory.

-----Original Message-----
From: Bill Pierce [mailto:ooogalapasooo at aol.com]
Sent: Tuesday, May 21, 2013 05:12 PM
To: coco at maltedmedia.com
Subject: [Coco] 64k memory check

Hi guys,I just aquired a Coco 1 (grey) Cat 278-300A., CCR-81 Cassette Recorder, 
X-Pad and a few carts and tapes.The Coco powers up fine.Extendended Color Basic 
1.0PRINTMEM reports 24871Since this is an "F" board and the "F" boards were the 
first Coco 1s actually "meant" to be upgraded to 64k, I assume it is 64k.The 
warrenty seal has been removed and replaced by a Radio Shack Service Center 
seal, so I would think it had to be upgraded by Radio Shack or the seal would be 
broken. What I would like to know, and I know it's been discussed many times 
before, is if there is a PEEK/POKE or short routine to test for 64k? I plan to 
hook it up to a drive and run OS-9 Level 1 and that will surely fail if it's 
32k. But if there's a quick way, that would save me a lot of troubleHere a link 
to some pics of the Coco 1 and accessories I recievedhttps://sites.google.com/site/dabarnstudio/temp-picsBill 
PierceMy Music from the Tandy/Radio Shack Color Computer 2 & 
3https://sites.google.com/site/d
 abarnstudio/Co-Webmaster of The TRS-80 Color Computer Archivehttp://www.colorcomputerarchive.com/Co-Contributor, 
Co-Editor for CocoPediahttp://www.cocopedia.com/wiki/index.php/Main_PageE-Mail: 
ooogalapasooo at aol.com--Coco mailing listCoco at maltedmedia.comhttp://five.pairlist.net/mailman/listinfo/coco

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