Transdisk track sizing

Hi,

I have sent standard ADF images (eg regular 79 tracks) from the PC to my A1200 using ADF sender terminal.

However I am at a total loss how to send irregular ADF images like games over to the A1200,

I have used the -e command to specify the number of tracks, however how do I know how many tracks an ADF holds?

How do I then configure both the PC and Amiga to do this?

[Overdoc]

Hmm, I would say like this: ( it's just an idea ! No guarantee it really is like that ! )

A normal ADF has 80 tracks and is 880kB big, which is 901120 bytes.
Somehow ( which looks a little bit strange to me ?!? ) it seems that an ADF is organised in a way that every track has the same length. At least I assume it is like that, because I can successfully split an ADF into 2 equal big parts and then write them back to a disk in two goes, track 0-39 and then track 40-79 ! It is really strange that this works because from my knowledge the inner tracks would have less sectors than the outer ones and therefore should be shorter....
But anyway, if I assume every track holds an equal numer of bytes then one track has 901120 / 80 = 11264 bytes.
So an ADF with 912384 bytes would be 81 tracks and one with
923648 bytes would be 82 tracks long.
To set the number of tracks use the -s for startrack ( 0 is the forst one ) and -e for the end track ( normally 79 )

I hope I am not telling complete bullshit....

[thomas]

What you tell about inner and outer tracks was true on 5.25" floppies on the C64. All 3.5" floppies have equal track sizes.

Amiga DD: 2 heads with 80 tracks with 11 sectors with 512 bytes = 880KB
Amiga HD: 2 heads with 80 tracks with 22 sectors with 512 bytes = 1760KB
PC DD: 2 heads with 80 tracks with 9 sectors with 512 bytes = 720 KB
PC HD: 2 heads with 80 tracks with 18 sectors with 512 bytes = 1440KB

Every ADF has exactly 880KB. There are extended ADFs with bit images in them, but they cannot be written back to disk. Only 880KB ADFs can be written to disk.

PLEASE DO NOT INCLUDE SIGNATURES IN YOUR POSTS! CONFIGURE USERCP INSTEAD! -ADMIN

[Overdoc]

Originally posted by thomas
[B]What you tell about inner and outer tracks was true on 5.25" floppies on the C64. All 3.5" floppies have equal track sizes.

Hehe, yes, I cannot deny I have had a C64 for almost 20 years by now...
This has made me thinking in a C64 way

Thanks Overdoc and Thomas, you given me both a useful explanation of how things work, but there is a lot of maths needed!

[thomas]

PLEASE DO NOT INCLUDE SIGNATURES IN YOUR POSTS! CONFIGURE USERCP INSTEAD! -ADMIN [/B]

This is the only board in the world with such a daft rule. I just can't keep it in mind.

Bye

but there is a lot of maths needed!

You think that multiplying a few numbers is a lot of maths ? Come on, we are talking about computers, they do nothing but math.

Hint: add an alias to your shell-startup like this: alias say rx "say []"
then you can open a shell window and enter say 2*80*11*512/1024 and it will tell you 880.

Bye