Bringing up a CPM

From: allisonp_at_world.std.com <(allisonp_at_world.std.com)>
Date: Thu May 27 14:17:26 1999

On Thu, 27 May 1999, Dwight Elvey wrote:
>
> 1. Are the directory sectors interleaved like the file sectors are?

The boot sectors (reserved tracks) are generally not, the rest of the disk
is. CPM it self does not care it's a BIOS issue..

> 2. When I checked the size of the CPM image that was on the
> unoffical CPM site, it was 60 sectors in size. When I looked
> at the manual, it said that this would be loaded by a boot
> loader that would load in locations 3400H to 4D80H. This is
> only 51 sectors. This also matches the remaining track
> zero plus track 1 of a single density disk. What am I suppose
> to do?



that means the saved image has either dead space at the end or a bios
there. It could be that teh file was off a system with 4k allcoation
blocks so fine sized tend to round up.
 
The standard size for cpm a is:

        CCP 800h 2048 bytes
        Bdos E00h 3584 bytes
        BIOS variable 8"sssd example is 1500bytes.

This is generally stuffed on to the sssd 8" as the first two tracks of the
disk, 52 sectors total or 6656 bytes for all three components.

Allison
Received on Thu May 27 1999 - 14:17:26 BST

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