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Help With Apple II Assembly Programming

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  Help With Apple II Assembly Programming AppleCoder <alxmist@aol.com> - 2016-03-06 10:30 -0800
    Re: Help With Apple II Assembly Programming wssimms@gmail.com - 2016-03-06 11:15 -0800
      Re: Help With Apple II Assembly Programming Antoine Vignau <antoine.vignau@laposte.net> - 2016-03-06 11:36 -0800
    Re: Help With Apple II Assembly Programming gids.rs@sasktel.net - 2016-03-06 16:53 -0800
    Re: Help With Apple II Assembly Programming Benoit0123 <bgilon@free.fr> - 2016-03-07 16:19 +0000
      Re: Help With Apple II Assembly Programming alxmist@aol.com - 2016-03-07 08:55 -0800
      Re: Help With Apple II Assembly Programming Benoit0123 <bgilon@free.fr> - 2016-03-07 17:15 +0000
      Re: Help With Apple II Assembly Programming Benoit0123 <bgilon@free.fr> - 2016-03-07 17:32 +0000
    Re: Help With Apple II Assembly Programming Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-07 09:44 -0800
      Re: Help With Apple II Assembly Programming alxmist@aol.com - 2016-03-08 09:45 -0800
        Re: Help With Apple II Assembly Programming Michael J. Mahon <mjmahon@aol.com> - 2016-03-08 14:27 -0600
        Re: Help With Apple II Assembly Programming D Finnigan <dog_cow@macgui.com> - 2016-03-08 23:17 +0000
          Re: Help With Apple II Assembly Programming Michael J. Mahon <mjmahon@aol.com> - 2016-03-08 19:47 -0600
            Re: Help With Apple II Assembly Programming D Finnigan <dog_cow@macgui.com> - 2016-03-09 02:05 +0000
            Re: Help With Apple II Assembly Programming wssimms@gmail.com - 2016-03-08 19:26 -0800
              Re: Help With Apple II Assembly Programming alxmist@aol.com - 2016-03-09 07:54 -0800
                Re: Help With Apple II Assembly Programming wssimms@gmail.com - 2016-03-09 09:13 -0800
                  Re: Help With Apple II Assembly Programming alxmist@aol.com - 2016-03-09 09:38 -0800
                    Re: Help With Apple II Assembly Programming gids.rs@sasktel.net - 2016-03-09 22:14 -0800
                    Re: Help With Apple II Assembly Programming Benoit0123 <bgilon@free.fr> - 2016-03-10 08:44 +0000
                      Re: Help With Apple II Assembly Programming alxmist@aol.com - 2016-03-10 10:19 -0800
                        Re: Help With Apple II Assembly Programming wssimms@gmail.com - 2016-03-10 10:58 -0800
                        Re: Help With Apple II Assembly Programming Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-11 03:30 -0800
                          Re: Help With Apple II Assembly Programming alxmist@aol.com - 2016-03-11 09:55 -0800
                            Re: Help With Apple II Assembly Programming D Finnigan <dog_cow@macgui.com> - 2016-03-11 21:27 +0000
                            Re: Help With Apple II Assembly Programming gids.rs@sasktel.net - 2016-03-11 14:02 -0800
                            Re: Help With Apple II Assembly Programming Michael J. Mahon <mjmahon@aol.com> - 2016-03-11 16:24 -0600
                            Re: Help With Apple II Assembly Programming wssimms@gmail.com - 2016-03-12 09:30 -0800
                            Re: Help With Apple II Assembly Programming Michael Pohoreski <michael.pohoreski@gmail.com> - 2016-03-13 14:14 -0700
                            Re: Help With Apple II Assembly Programming Chris Torrence <gorthmog@gmail.com> - 2016-04-07 10:28 -0700

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#2437 — Help With Apple II Assembly Programming

I have been trying for months to do some 6502 assembly programming on Apple II but am having so many problems. Mainly, DOS commands are not working on the emulator I am using: Virtual II Version 6.3.7 with Apple II E ROM loaded in. I tried using the PRING CHR$(4) trick as instructed by my programming books, but that does not work either. I just get syntax errors. 

Does anyone know why these DOS commands are not working? Without them I cannot format/initialize a blank disk to use with the Merlin Pro Assembler I have been coding on. For that matter, does anyone have an earlier copy of Merlin, one that does not use ProDOS? Preferably the one in the following video:

https://www.youtube.com/watch?v=p4vexfGMjEY

Please help. I have been studying 6502 for a long time and want so much to try some programming with it.

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#2438

On Monday, March 7, 2016 at 3:30:24 AM UTC+9, AppleCoder wrote:
> I have been trying for months to do some 6502 assembly programming on Apple II but am having so many problems. Mainly, DOS commands are not working on the emulator I am using: Virtual II Version 6.3.7 with Apple II E ROM loaded in. I tried using the PRING CHR$(4) trick as instructed by my programming books, but that does not work either. I just get syntax errors. 
> 
> Does anyone know why these DOS commands are not working? Without them I cannot format/initialize a blank disk to use with the Merlin Pro Assembler I have been coding on. For that matter, does anyone have an earlier copy of Merlin, one that does not use ProDOS? Preferably the one in the following video:
> 
> https://www.youtube.com/watch?v=p4vexfGMjEY
> 
> Please help. I have been studying 6502 for a long time and want so much to try some programming with it.

I encourage you to continue using Prodos.
For formatting disks, download this image:

http://mirrors.apple2.org.za/ftp.apple.asimov.net/images/masters/prodos/PRODOS-8%20v4.0.2%20System.dsk

This is a bootable Prodos floppy disk image that has a program called System Utilities on it. You can format images with system utilities.

I also encourage you to use a hard disk (omnidrive -- or whatever it is that Virtual II calls it) image instead of floppy images. You will need to use System Utilities to format the hard disk image, and create a directory for Merlin. then copy everything from the System Utilities disk into the root directory of your hard disk image, and everything from the Merlin Pro disks into the merlin directory.

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#2439

You need DOS to initialize disks and use commands through the chr$(4) trick. By default, you have no DOS in Apple IIs.

Use the link given above or browse the FTP Asimov repository (ask Google for a link)

Good luck

FAA6G ;-)

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#2441

On Sunday, March 6, 2016 at 12:30:24 PM UTC-6, AppleCoder wrote:
> I have been trying for months to do some 6502 assembly programming on Apple II but am having so many problems. Mainly, DOS commands are not working on the emulator I am using: Virtual II Version 6.3.7 with Apple II E ROM loaded in. I tried using the PRING CHR$(4) trick as instructed by my programming books, but that does not work either. I just get syntax errors. 
> 
> Does anyone know why these DOS commands are not working? Without them I cannot format/initialize a blank disk to use with the Merlin Pro Assembler I have been coding on. For that matter, does anyone have an earlier copy of Merlin, one that does not use ProDOS? Preferably the one in the following video:
> 
> https://www.youtube.com/watch?v=p4vexfGMjEY
> 
> Please help. I have been studying 6502 for a long time and want so much to try some programming with it.


COPY II+ is an excellent utility to have on hand.  It can do everything from formatting both DOS 3.3 and Prodos disks, catalog both Dos's, rename volumes and files, delete files, copy files between both Dos's, create directories under Prodos.  I find version 8.4 the most stable.  Don't use v9.1, it has bugs.

And I concur.  Keep using prodos.  It has way more programming power down the road once you get a collection of the right utilities.  The directory structure offered by Prodos will keep your files organized.  And a hard drive or flash drive will help speed things up tremendously.

But keep up with it.  The rewards are great once everything falls into place.

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#2443

AppleCoder wrote:
> I have been trying for months to do some 6502 assembly programming on
> Apple
> II but am having so many problems. Mainly, DOS commands are not working on
> the emulator I am using: Virtual II Version 6.3.7 with Apple II E ROM
> loaded in. I tried using the PRING CHR$(4) trick as instructed by my
> programming books, but that does not work either. I just get syntax
> errors.
> 
> 
> Does anyone know why these DOS commands are not working? Without them I
> cannot format/initialize a blank disk to use with the Merlin Pro Assembler
> I have been coding on. For that matter, does anyone have an earlier copy
> of
> Merlin, one that does not use ProDOS? Preferably the one in the following
> video:
> 
> https://www.youtube.com/watch?v=p4vexfGMjEY
> 
> Please help. I have been studying 6502 for a long time and want so much to
> try some programming with it.
>
You can find already initialized disks here:
http://bgilon.free.fr/apple2/Peersoftv1.5.6.zip
Within this archive you'll find already initialized bootable disk images
including one (D34Merlin - 2.48.do) that contains the core files for the
last DOS 3.3 release of Merlin 8 (last Merlin suite of assembler for DOS 3.3
system). Just discard the files you do not have any use of (typically my own
stuff).

In case you would like to get a ProDOS 8 disk image, I would suggest that
you download the disk image, I should come by with a suitable disk image
later in the day, I'll post a message in this thread with a suitable URL if
you're interested.

Beware of using some features from copy program such as Copy II+ as it tends
to transform the format of target disk images (from byte level to nibble
image) under Virtual 2 at least.

HTHATS,
Benoît



-- 
Growing old is mandatory..
growing up is optional..
But the other way round is as true.

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#2444

Okay. This is another problem I have been having: Whenever I try to save to, or catalog a blank/initialized disk WITH Merlin, I get 45 VOLUME NOT FOUND. Yet, with the ProDOS System Utility I can catalog it and everything works fine.

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#2445

Benoit0123 wrote:
> AppleCoder wrote:
>> I have been trying for months to do some 6502 assembly programming on
>> Apple
>> II but am having so many problems. Mainly, DOS commands are not working
>> on
>> the emulator I am using: Virtual II Version 6.3.7 with Apple II E ROM
>> loaded in. I tried using the PRING CHR$(4) trick as instructed by my
>> programming books, but that does not work either. I just get syntax
>> errors.
>> 
>> 
>> Does anyone know why these DOS commands are not working? Without them I
>> cannot format/initialize a blank disk to use with the Merlin Pro
>> Assembler
>> I have been coding on. For that matter, does anyone have an earlier copy
>> of
>> Merlin, one that does not use ProDOS? Preferably the one in the following
>> video:
>> 
>> https://www.youtube.com/watch?v=p4vexfGMjEY
>> 
>> Please help. I have been studying 6502 for a long time and want so much
>> to
>> try some programming with it.
>>
> You can find already initialized disks here:
> http://bgilon.free.fr/apple2/Peersoftv1.5.6.zip
> Within this archive you'll find already initialized bootable disk images
> including one (D34Merlin - 2.48.do) that contains the core files for the
> last DOS 3.3 release of Merlin 8 (last Merlin suite of assembler for DOS
> 3.3
> system). Just discard the files you do not have any use of (typically my
> own
> stuff).
> 
> In case you would like to get a ProDOS 8 disk image, I would suggest that
> you download the disk image, I should come by with a suitable disk image
> later in the day, I'll post a message in this thread with a suitable URL
> if
> you're interested.
> 
> Beware of using some features from copy program such as Copy II+ as it
> tends
> to transform the format of target disk images (from byte level to nibble
> image) under Virtual 2 at least.
> 
> HTHATS,
> Benoît
>
It seems that you are stuck with an old version of Merlin here. Hence it is
normal that a disk initialized in ProDOS is not suitable for being catalog
listed from a DOS 3.3 flavour of Merlin...
Therefore I would suggest that:
a) you exit from Merlin main menu (Q command),
b) eject the disk in drive 1 of your emulator box and do a file copy under
Mac OS X of this disk image file.
c) insert the copy in drive 2 of your emulator box
d) Type the command "INIT HELLO,D1" from the "]" command prompt.
e) Place the newly inited disk image into drive 2 of your emulator box
f) Reboot the Merlin disk (after inserting its disk image into drive 1).
g) From Merlin main menu, you should then be able to catalog the disk in
drive 2 of your emulator box (just select drive 2, beforewards).
From then on, copying some source files from disk 1 to disk 2 under merlin
should be easy, do not forget to Save .s files and to Write t. text files
for such copying in order to preserve the usage of such files.





-- 
Growing old is mandatory..
growing up is optional..
But the other way round is as true.

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#2446

Benoit0123 wrote:
> AppleCoder wrote:
>> I have been trying for months to do some 6502 assembly programming on
>> Apple
>> II but am having so many problems. Mainly, DOS commands are not working
>> on
>> the emulator I am using: Virtual II Version 6.3.7 with Apple II E ROM
>> loaded in. I tried using the PRING CHR$(4) trick as instructed by my
>> programming books, but that does not work either. I just get syntax
>> errors.
>> 
>> 
>> Does anyone know why these DOS commands are not working? Without them I
>> cannot format/initialize a blank disk to use with the Merlin Pro
>> Assembler
>> I have been coding on. For that matter, does anyone have an earlier copy
>> of
>> Merlin, one that does not use ProDOS? Preferably the one in the following
>> video:
>> 
>> https://www.youtube.com/watch?v=p4vexfGMjEY
>> 
>> Please help. I have been studying 6502 for a long time and want so much
>> to
>> try some programming with it.
>>
> You can find already initialized disks here:
> http://bgilon.free.fr/apple2/Peersoftv1.5.6.zip
> Within this archive you'll find already initialized bootable disk images
> including one (D34Merlin - 2.48.do) that contains the core files for the
> last DOS 3.3 release of Merlin 8 (last Merlin suite of assembler for DOS
> 3.3
> system). Just discard the files you do not have any use of (typically my
> own
> stuff).
> 
> In case you would like to get a ProDOS 8 disk image, I would suggest that
> you download the disk image, I should come by with a suitable disk image
> later in the day, I'll post a message in this thread with a suitable URL
> if
> you're interested.
> 
> Beware of using some features from copy program such as Copy II+ as it
> tends
> to transform the format of target disk images (from byte level to nibble
> image) under Virtual 2 at least.
> 
> HTHATS,
> Benoît
>
Humm, I just tested it with a recent version of Merlin 8 here, and it seems
that the DOS 3.3 INIT command has been deactivated by the Merlin assembler
in order for the ASSEM new command to work under DOS 3.3.
Therefore, the remaining options you have is either to use the ProDOS 8
version of Merlin 8, to initialize the disk with a ProDOS 8 utility, and
then under Merlin 8 for ProDOS, to type the D command (for disk): "PFX=2"
(assuming the newly initialized disk is in drive 2) and then to catalog the
disk. Or just type in the "=1" or "=2" whjen prompted to enter a pathname to
catalog or simply copy the files under Mac OS X.
In case you are looking for a workable Merlin version (ProDOS 8 v2.55 which
is not the latest), a URL to download from is
http://bgilon.free.fr/apple2/P8Merlin_ZBrun.do

HTHATS,
Benoît



-- 
Growing old is mandatory..
growing up is optional..
But the other way round is as true.

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#2447

On Windows, I'd recommend: AppleWin
On OSX / Linux, I'd recommend: Jace

Why? Because you can mount virtual .DSK images from the command line for fast turn around time.

Whether you use DOS3.3 or ProDOS won't really matter once you have a work-flow down.

I'm using cc65 -- the assembler + linker, a2tools, and a BASH script to assemble, link, copy the binary to a .DSK image.

Let us know if you have any other questions.

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#2450

I am using Merlin Pro Version 1.34. Does anyone have experience with that? The only version of Merlin Pro 2.0 I could find did not have automatic line numbering, and I could not figure out how to escape the Editor.

Funny thing is that if I make a copy of the Merlin disk, I can save and run assembly programs on that, but not one that has been initialized via Copy II Plus or ProDOS Utility.

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#2451

<alxmist@aol.com> wrote:
> I am using Merlin Pro Version 1.34. Does anyone have experience with
> that? The only version of Merlin Pro 2.0 I could find did not have
> automatic line numbering, and I could not figure out how to escape the Editor.
> 
> Funny thing is that if I make a copy of the Merlin disk, I can save and
> run assembly programs on that, but not one that has been initialized via
> Copy II Plus or ProDOS Utility.
> 

You need to download the Merlin 8 manual. 

It has plenty of useful information to get you going--information that you
clearly need. 

The ProDOS version is the most capable, and IIRC, version 2.34 is readily
available for download. 
-- 
-michael - NadaNet 3.1 and AppleCrate II:  http://michaeljmahon.com

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#2452

alxmist wrote:
> I am using Merlin Pro Version 1.34. Does anyone have experience with that?
> The only version of Merlin Pro 2.0 I could find did not have automatic
> line
> numbering, and I could not figure out how to escape the Editor.
> 
> Funny thing is that if I make a copy of the Merlin disk, I can save and
> run
> assembly programs on that, but not one that has been initialized via Copy
> II Plus or ProDOS Utility.
>

Like Mr. Mahon said, the later versions of Merlin Pro are well worth
upgrading too. Once you get used to the new features in the editor, you end
up being more productive.*

You need to press Command-Q to exit the editor. I think that's Open-Apple if
you're using an older IIe keyboard.

Here is a link to get version 2.43:
http://macgui.com/downloads/?file_id=8140&keywords=merlin%20pro


* though at some point a confirmation was added to the Quit command that
annoyed me so much, I patched it out!

-- 
]DF$
The Marina IP stack for Apple II--
http://marina.a2hq.com/

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#2453

D Finnigan <dog_cow@macgui.com> wrote:
> alxmist wrote:
>> I am using Merlin Pro Version 1.34. Does anyone have experience with that?
>> The only version of Merlin Pro 2.0 I could find did not have automatic
>> line
>> numbering, and I could not figure out how to escape the Editor.
>> 
>> Funny thing is that if I make a copy of the Merlin disk, I can save and
>> run
>> assembly programs on that, but not one that has been initialized via Copy
>> II Plus or ProDOS Utility.
>> 
> 
> Like Mr. Mahon said, the later versions of Merlin Pro are well worth
> upgrading too. Once you get used to the new features in the editor, you end
> up being more productive.*
> 
> You need to press Command-Q to exit the editor. I think that's Open-Apple if
> you're using an older IIe keyboard.
> 
> Here is a link to get version 2.43:
> http://macgui.com/downloads/?file_id=8140&keywords=merlin%20pro
> 
> 
> * though at some point a confirmation was added to the Quit command that
> annoyed me so much, I patched it out!
> 

Hmmm. I don't recall using any "Apple" keys--just q followed by enter...

It's a pretty ordinary command line editor, with, of course, it's own
choice of command names and abbreviations. 

You assemble straight from the editor by saying "asm". If you want a
listing somewhere besides the screen, type "prtr 1" before "asm". 
-- 
-michael - NadaNet 3.1 and AppleCrate II:  http://michaeljmahon.com

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#2454

Michael J. Mahon wrote:
> 
> Hmmm. I don't recall using any "Apple" keys--just q followed by enter...
> 

Oh, I know what I'm thinking of. That's the key command I use to exit the
insert or append mode in the editor and get back to the editor's command
mode.

-- 
]DF$
The Marina IP stack for Apple II--
http://marina.a2hq.com/

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#2455

On Wednesday, March 9, 2016 at 10:48:00 AM UTC+9, mjm...@aol.com wrote:
> D Finnigan <dog_cow@macgui.com> wrote:
> > alxmist wrote:
> >> I am using Merlin Pro Version 1.34. Does anyone have experience with that?
> >> The only version of Merlin Pro 2.0 I could find did not have automatic
> >> line
> >> numbering, and I could not figure out how to escape the Editor.
> >> 
> >> Funny thing is that if I make a copy of the Merlin disk, I can save and
> >> run
> >> assembly programs on that, but not one that has been initialized via Copy
> >> II Plus or ProDOS Utility.
> >> 
> > 
> > Like Mr. Mahon said, the later versions of Merlin Pro are well worth
> > upgrading too. Once you get used to the new features in the editor, you end
> > up being more productive.*
> > 
> > You need to press Command-Q to exit the editor. I think that's Open-Apple if
> > you're using an older IIe keyboard.
> > 
> > Here is a link to get version 2.43:
> > http://macgui.com/downloads/?file_id=8140&keywords=merlin%20pro
> > 
> > 
> > * though at some point a confirmation was added to the Quit command that
> > annoyed me so much, I patched it out!
> > 
> 
> Hmmm. I don't recall using any "Apple" keys--just q followed by enter...
> 
> It's a pretty ordinary command line editor, with, of course, it's own
> choice of command names and abbreviations. 
> 
> You assemble straight from the editor by saying "asm". If you want a
> listing somewhere besides the screen, type "prtr 1" before "asm".

Command-Q takes you out of the screen editor, and back to the line
editor, where you can then assemble with 'asm'.

The original poster mentioned using Virtual II. On Virtual II, you have
to double tap the command key for it to register as an open-apple
keystroke.

That is, in the Merlin Pro screen editor, you have to double tap the
Mac keyboard command key every time you want to use an open-apple
editing command, like Command-X for copy, Command-V for paste,
Command-B to go to the top of the file, Command-N to go to the bottom
of the file, Command-D to delete a line, etc.

It is incredibly annoying, but after a while I got used to it. You hit
Command twice in quick succession, holding it the second time
while typing the letter: tap-tapHOLD-Q-release to quit the screen
editor, for example.

In any case, I'm using Merlin 8 v.2.58, which I find satisfactory.
Here are the links to the disk images:

http://mirrors.apple2.org.za/ftp.apple.asimov.net/images/programming/assembler/merlin/Merlin-8%20v2.58%20(ProDOS)%20Disk%201-2.dsk
http://mirrors.apple2.org.za/ftp.apple.asimov.net/images/programming/assembler/merlin/Merlin-8%20v2.58%20(ProDOS)%20Disk%202-2.dsk

And here is the manual as a PDF-scan (12MB):

https://archive.org/33/items/Merlin_816_Macro_Assembler_Manual/Merlin_816_Macro_Assembler_Manual.pdf

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#2459

I got the hang of Merlin 8 now, but it, too, will not recognize my formatted disks? Does anyone have a copy of one they regularly use?

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#2461

On Thursday, March 10, 2016 at 12:54:30 AM UTC+9, alx...@aol.com wrote:
> I got the hang of Merlin 8 now, but it, too, will not recognize my formatted disks? Does anyone have a copy of one they regularly use?

How are you formatting the disks? And what volume name are you giving them?
Assuming you are formatting them as Prodos Disks, you will have to enter a volume
name when you format them. Something like: /CODE

When you are using Merlin 8, you will have to refer to the disks using this volume name.
The easiest thing to do is set the prefix (like a 'cd' command in Unix). In Merlin 8 you
can set the prefix from the main menu by first hitting 'd' for 'disk command' and then
typing

pfx /VOLUME.NAME

While replacing VOLUME.NAME with whatever you named your disk. Of course, the disk
must be in the drive for this to work. After you do this, Merlin will always look on that disk
(more exactly, it will look in the volume directory of that disk) for whatever filename you
specify.

If you are not formatting your disks as Prodos disks, you must format them as Prodos
disks to work with Merlin 8.

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#2462

I have tried numerous programs to format disks:

ProDOS User's Disk
Appleworks
Copy II Plus

I generally name them TEST.DSK or something similar.

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#2467

On Wednesday, March 9, 2016 at 11:38:57 AM UTC-6, alx...@aol.com wrote:
> I have tried numerous programs to format disks:
> 
> ProDOS User's Disk
> Appleworks
> Copy II Plus
> 
> I generally name them TEST.DSK or something similar.


Under Prodos, you may have to include the forward slash in the name for it to be recognized as a volume name.

Try entering  /TEST.DSK

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#2468

alxmist wrote:
> I have tried numerous programs to format disks:
> 
> ProDOS User's Disk
> Appleworks
> Copy II Plus
> 
> I generally name them TEST.DSK or something similar.
>
Which version of Merlin 8 are you using, there are some for the DOS 3.3
system (eg. 2.48) and others for ProDOS 8 (eg. 2.55 or 2.58).
Please refer to my previous post on this thread to catalog a ProDOS disk w/o
knowing the volume name (just use the "=drivenumber" keyboard entry when
prompted for pathname on the catalog entry menu.
In the same post, I quoted a URL from where you can download main components
for the Merlin 8 ProDOS version assembler. Enough for you to do your testing
before downloading the full version from asimov.
HTHATS,
Benoît


-- 
Growing old is mandatory..
growing up is optional..
But the other way round is as true.

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