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Could someone give me a short leasson in 1581 usage?
Posted: Sun Apr 04, 2010 5:17 pm
by Boray
I would like to know how to create partitions/subdirs and how to go to such a directory. I need it for making a test .D81 file for possible PRG Starter .D81 support.
Re: Could someone give me a short leasson in 1581 usage?
Posted: Sun Apr 04, 2010 5:55 pm
by gklinger
Boray wrote:I would like to know how to create partitions/subdirs and how to go to such a directory.
You should download a copy of the 1581 user's guide from
here and direct your attention to page 77 where you'll find information about partitions and sub-directories.
Re: Could someone give me a short leasson in 1581 usage?
Posted: Sun Apr 04, 2010 7:17 pm
by RobertBe
Boray wrote:I would like to know how to create partitions/subdirs and how to go to such a directory.
If you have a C64 or C128, you can use 1581 Toolkit, and that program will easily make partitions on a 1581 disk.
Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
CommVEx v6 2010 -
http://www.commodore.ca/forum and click on ComVEX
Posted: Mon Apr 05, 2010 4:50 am
by Boray
Thanks!
I tried this in VICE but nothing happens:
10 open15,8,15
20 print#15,"/0:subdir,"+chr$(80)+chr$(0)+chr$(240)+chr$(0)+",c"
30 close15
Nothing shows up in the root dir. Is something wrong or isn't subdirs supported in VICE or .D81 files?
Re: Could someone give me a short leasson in 1581 usage?
Posted: Mon Apr 05, 2010 4:50 am
by Boray
RobertBe wrote:
If you have a C64 or C128, you can use 1581 Toolkit, and that program will easily make partitions on a 1581 disk.
I don't have a 1581.
Posted: Mon Apr 05, 2010 6:11 am
by Boray
I managed to test partitions by using the Bible.D81 to try with... I've concluded that VICE doesn't look inside the partitions when autostarting so I don't have to bother with that either.
Posted: Thu Feb 17, 2011 11:15 am
by sjgray
Boray wrote:Thanks!
I tried this in VICE but nothing happens:
10 open15,8,15
20 print#15,"/0:subdir,"+chr$(80)+chr$(0)+chr$(240)+chr$(0)+",c"
30 close15
Nothing shows up in the root dir. Is something wrong or isn't subdirs supported in VICE or .D81 files?
I'm just starting to play with Partitions... There are only 80 tracks, and 40 sectors per track but in your example above you start the partition at track 80 and try to allocate 240 sectors, which goes beyond the capacity of the disk. Make sure you select the 1581 as your drive type in Vice.
I am able to create partitions using vice that appear in the directory, but so far am not able to get into those partitions to format them or store files on. I've created up to 4 partitions of verious lengths but when I try to select them I get error "77, selected partition illegal"....
Anyone else have any experience with these without using a utility?
Steve
Posted: Thu Feb 17, 2011 10:56 pm
by sjgray
I was just re-reading this and realized I forgot there were two sides, so I guess 160 tracks. Perhaps you can't make a partition spanning sides....
Steve
Posted: Fri Feb 18, 2011 12:05 pm
by Mike
The 1581 has 80 tracks with 40 sectors each, 3200 blocks total. 40 blocks are required for the directory track, which gives 3160 blocks free on an empty 3 1/2 inch disk.
sjgray wrote:Anyone else have any experience with these without using a utility?
For the two Bible disks I created the partitions (which contain the chapter files as SEQ data) manually. I used no other method than the one described in the 1581 manual, so there ...
Posted: Fri Feb 18, 2011 2:58 pm
by sjgray
So my original reply is correct then? The OP was trying to create a partition that would spill off the end of the disk. Specifying a lower start track would be the answer.
It still doesn't explain why I can't get into my partitions. The user's guide says the ending sector must be a multiple of 40, but if sectors start at zero then 39 is the last sector. I've tried xx=39,40,80 etc as my "number of sectors" in the "/0:name,tsxx,c" create partition command, and still I can't get into it.
I'm looking for a D81 image that contains multiple partitions, formatted with files. Can anyone help?
Steve
Posted: Fri Feb 18, 2011 3:12 pm
by Mike
Hi, Steve,
sjgray wrote:So my original reply is correct then?
yes it is.
It still doesn't explain why I can't get into my partitions. The user's guide says the ending sector must be a multiple of 40, but if sectors start at zero then 39 is the last sector. I've tried xx=39,40,80 etc as my "number of sectors" in the "/0:name,tsxx,c" create partition command, and still I can't get into it.
xx must be specified as 16-bit number, not in PETSCII.
For a 120 blocks partition at the start of the disk (the minimum size which can be formatted), you'd specify:
Code: Select all
"/0:name,"+CHR$(1)+CHR$(0)+CHR$(120)+CHR$(0)+",C"
then change into that partition, and format it with the same ID that was used for the whole disk.
I'm looking for a D81 image that contains multiple partitions, formatted with files.
In these two threads you find example *.d81 images:
http://sleepingelephant.com/ipw-web/bul ... php?t=4385
http://sleepingelephant.com/ipw-web/bul ... php?t=4936
Greetings,
Michael
Posted: Fri Feb 18, 2011 3:39 pm
by sjgray
Ah, somehow I missed the part about minimum 120 sectors... now it makes sense. Thanks for the help and links!
Steve