[Coco] Memory available in NitrOS-9 ?

[Bill Nobel]

For Memory wise that is pretty close Stephen, 128k doesn’t give much by the time GrfDrv & CoWin come into play.  It also depends on how much of the merging of stdfonts/pats etc… you have in your startup.

Bill Nobel

> On Jan 17, 2015, at 8:46 PM, univax!gatech!destroyer!trantor!kandur <k at qdv.pw> wrote:
> 
> You may have missed my many postings regarding the 
> 128k memory problem, before upgrading my Coco-3 to 512k.
> My solution may not help you with Dynacalc, requiring
> graphic screens, but may help you in some other ways to use NitrOS-9. 
> Look at HURDLE 4  in http://qdv.pw/coco/?p=185 
> 
> Kandur
> 
> Saturday, January 17, 2015, 1:00:01 PM, you wrote:
>> Hello again, all,
> 
>> So, here I am wandering around in NitrOS-9 again...
> 
>> My system is a 128K CoCo 3 with HDBDOS in an EPROM cartridge, using Drivewire 4.
> 
>> I now know that NitrOS-9 cannot read any of my other .DSK images, so I cannot
>> get any of my other files into NitrOS-9 easily.  Since I have not found the
>> equivalent of the excellent FILE2DSK tool for OS-9 yet, this may become a challenge for me.
> 
>> Next, I figured that I'd go to one of the CoCo software repositories and pick
>> up something to play around with.  I selected Dynacalc from Tandy for OS-9.  I
>> inserted the .DSK image into my Drivewire server and took a look at it.  It
>> appeared that the disk is supposed to be in drive 0, because it has files like
>> OS9boot and STARTUP.  also at the top level is a file called DYNACALC.TRM.  I
>> took a look into the CMDS directory, and there is DYNACALC, along with only a few other commands.
> 
>> Well, I am getting smart enough to understand that I probably cannot put this
>> .DSK image into my Drivewire drive 0 and issue the DOS command, because the
>> Tandy software probably has no knowledge of HDBDOS and probably won't boot. 
>> But I did try to invoke the program by typing:  /X3/CMDS/DYNACALC.
> 
>> What happened next?  I watched Drivewire start out on my drive 0 (as
>> expected) then move onto drive 3 (as I had hoped) and then after a couple of
>> seconds, I got an error #207 - that's memory full.
> 
>> So, knowing that I am at least on the right track, I poked around a bit and
>> found that the MFREE command tells me that I have 24K available, and the MMAP
>> command shows me the same graphically.  So, in my 128K system, when I'm using
>> NitrOS-9 I have only 24K memory left available for programs that I want to run.
> 
>> NOW I know why many folks here on the list are so interested in obtaining more memory for their machines!
> 
>> Thanks for listening.  I'll continue to putter around with this.
> 
>> smp
>> --
>> Stephen M. Pereira
>> Bedford, NH  03110
>> KB1SXE
> 
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