[Coco] DECB development under OS9

[Dave Philipsen]

> On May 13, 2018, at 8:30 PM, tonym <tonym at compusource.net> wrote:
> 
> Question:
> 
> Maybe I'm off track, but isn't what is being asked for, what Burke & Burke released as RSB?
> Write/run RS-DOS apps under OS9/NitrOS9?
> 

Not exactly. I was talking about creating RS-DOS apps under OS9 but running them in RS-DOS.  The problem is that if you try to develop in DECB then you are limited to a filesize of around 160k, there aren’t a lot of good screen-oriented editors, and fairly slim pickin’s for assemblers.  OS9 allows a lot bigger files, a number of different editors to choose from and at least four different assemblers that I know of.

Just as an example, if you have written a 24k DECB m/l program, chances are that the source code file is over 200k in size. If you like to make a bunch of comments it could get close to 1Mb in size. To my knowledge there is no editor that would handle such a file under DECB (maybe not even OS9) and you couldn’t even fit the file on a disk.

Dave


> Is RSB even viable under NitrOS9?
> 
> Tony
> 
> ---- Original Message ----
> From: coco at jechar.ca
> RSDOS at least partially works with the Cloud9 SuperIDE it can be used 
> to display
> a RSDOS directory if the virtual RS-DOS disk is described by the /ih 
> descriptor
> I have not tryed put or get yet will soon now as this gets my curiosity 
> up.
> 
>> On 2018-05-11 19:40, Bill Pierce via Coco wrote:
>> Curtis, RSDOS only works with real disks and emulations of the wd1773.
>> It will not work with DW4 or HDB/RGB dos partitions/dsks. Robert
>> Gault's "HRSDOS" will do all of them. It's what I based the MShell
>> RSDOS read/write code on.
>> 
>> 
>> 
>> 
>> 
>> Bill Pierce
>> "Charlie stole the handle, and the train it won't stop going, no way
>> to slow down!" - Ian Anderson - Jethro Tull
>> 
>> My Music from the Tandy/Radio Shack Color Computer 2 & 3
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>> 
>> 
>> 
>> 
>> 
>> -----Original Message-----
>> From: L. Curtis Boyle <curtisboyle at sasktel.net>
>> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
>> Sent: Fri, May 11, 2018 6:13 pm
>> Subject: Re: [Coco] DECB development under OS9
>> 
>> I think the RSDOS utility will do this already, so you could set that
>> up in a script to copy to/from a DECB disk image directly.L. Curtis
>> Boylecurtisboyle at sasktel.net> On May 11, 2018, at 4:02 PM, Dave
>> Philipsen <dave at davebiz.com> wrote:> > I have a possible project that
>> I'd like to get a little input on.  I would like to use NitrOS9 as my
>> development platform for programs that will run under DECB.  The
>> reason for this is that NitrOS9 is well suited in that it has plenty
>> of disk space and several assembler options available.  It would be
>> easy to include the headers inside of the source code for
>> compatibility with the DECB LOADM format as I've already done this
>> with a cross assembler under DOS/Windows.  I'm not really keen on the
>> idea of having to develop on a PC, transfer the output file via
>> drivewire to the CoCo, and test.> > I have a CoCo3 with 512K and I
>> have CoCoSDC that has disk images for booting NitrOS9 as well as
>> images for DECB.  What I was thinking is that I could write a utility
>> program that runs under NitrOS9 that would allow me to copy files back
>> and forth to one of the DECB disk images on the CoCoSDC.  Maybe it has
>> already been done.  Has anyone ever attempted this?  If not, is there
>> anyone who would want to give me a little advice on how,
>> theoretically, it might be done?> > I see there is a low level driver
>> for the cocosdc and I'm wondering how difficult it would be to mount a
>> DECB disk image and access the image as another drive under NitrOS9.
>> I realize that because of the difference in disk format the drive
>> would not be natively read/writeable from NitrOS9 but as long as all
>> of the virtual sectors were accessible then I could write a program to
>> access the data/programs in the DECB file system.  So I guess I'm
>> asking whether it would be feasible to mount one or more DECB disk
>> images on the CoCoSDC as virtual drives; /SD1, /SD2, etc.> > This
>> would allow me to write a program under NitrOS9, assemble it, copy the
>> DECB format binary to the correct DECB image on the CoCoSDC, then
>> reboot the computer and test the program out in DECB. Another idea I
>> have which would be an add-on to this would be a way to actually
>> compile a NitrOS9 C program and either trap or replace the system
>> calls and have the program usable under DECB.  I know this is a bit of
>> a stretch but it might be possible if only certain limited system
>> calls were used from the C program.> > > > Dave> > > -- > Coco mailing
>> list> Coco at maltedmedia.com>
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