Thank you (thanks to Andrew Collier as well).
So what's GDOS? A system software from MGT's ZX Spectrum disk interface Disciple or Plus D?
I'd like to know what are those 9 bytes at the start of each file for. The existence of these 9 bytes is quite well known for everyone, who ever tried to read Sam disks by sectors. But what's inside? If I want to add file to a sam disk myself, what should I put to these 9 bytes? It seems that these 9 bytes contain the same information as is stored in directory entry of a file. Please, can somebody tell me what should I write there if I would like to mimic the behaviour of Sam DOS? Thanks.
---------------------------------------------------------- Mgr.(MSc.) Ales Keprt (also known as Aley) [EMAIL PROTECTED] *** www.keprt.cz *** ICQ: 82357182 Dept. of Computer Science, VSB Technical University Ostrava, CZ - [EMAIL PROTECTED] - www.cs.vsb.cz ----------------------------------------------------------
----- Original Message ----- From: "Edwin Blink" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, January 13, 2005 2:50 AM
Subject: Re: How ROM knowns wheter a disk is "bootable"
I have a little technical question: How does Sam ROM know whether the file
no.01 is DOS, or not?
track 4 sector 1, offset $0100 the word "BOOT" bits 7 and 5 of each char is
ignored
If it finds it sector which was loaded at &8000 will be executed &8009 as
the first 9 are part of
(inherited from GDOS) file header which is unused.
Edwin
