Re: Let's discuss ZX Spectrum games

2005-01-13 Thread Edwin Blink
> Shouldn't the archive aim to store software in its original format? Some > titles were released on both disk and tape, so it would make sense to > preserve both disk and tape images, and not just the most convenient format. I agree > Converting existing disk titles to tape files seems wrong to

Re: Let's discuss ZX Spectrum games

2005-01-13 Thread Aley Keprt
My opinion is: 1. Original commercial software should be stored in original format. PLEASE SEND ME ALL >ORIGINAL< SAM TAPE ARCHIVES YOU OWN. (If it's possible.) I need these files to test ASCD tape capability. (Both TAP and TZX files are welcome, if they are perfect originals.) 2. Undergroun

RE: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Johnna
>From what I remember, it just tries to boot whatever is the first file on the disk. If this is SAM Dos then fine, if not then it fails. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aley Keprt Sent: 13 January 2005 01:32 To: sam-users@nvg.ntnu.no Subje

RE: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Johnna
Ignore me - I didn't read your question properly. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aley Keprt Sent: 13 January 2005 01:32 To: sam-users@nvg.ntnu.no Subject: How ROM knowns wheter a disk is "bootable" I have a little technical question: How

RE: Let's discuss ZX Spectrum games

2005-01-13 Thread Simon Owen
Edwin Blink wrote: > Hey I've got Lerm assembler on take ! I'm sure there where > some things that where on tape Shouldn't the archive aim to store software in its original format? Some titles were released on both disk and tape, so it would make sense to preserve both disk and tape images, and

How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Aley Keprt
I have a little technical question: How does Sam ROM know whether the file no.01 is DOS, or not? It doesn't blindly load anything there, is it? Does "bootable" disk have some special contents in track 0, sector 1? Or possibly the special contents are at track 4, sector 1? (I'd expect there is s

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Andrew Collier
On Jan 13, 2005, at 1:31 am, Aley Keprt wrote: I have a little technical question: How does Sam ROM know whether the file no.01 is DOS, or not? It doesn't blindly load anything there, is it? Does "bootable" disk have some special contents in track 0, sector 1? Or possibly the special contents

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Edwin Blink
> 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 fro

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Aley Keprt
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

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Aley Keprt
Oh, and does it mean that I can have SAMDOS at arbitrary directory slot as long as its body occupies tracks 4 and 5? If you say that ROM loads directly track 4... :-) Of course, it's >technically< impossible to create this kind of disk is with a standard SAVE command on Sam, because SAMDOS alw

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Frode Tenneboe
On Thu, 13 Jan 2005 06:38:06 +0100 "Aley Keprt" <[EMAIL PROTECTED]> wrote: > Oh, and does it mean that I can have SAMDOS at arbitrary directory slot as > long as its body occupies tracks 4 and 5? If you say that ROM loads directly > track 4... :-) The SAM ROM only loads the sector at track 4, se

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Frode Tenneboe
On Thu, 13 Jan 2005 06:27:31 +0100 "Aley Keprt" <[EMAIL PROTECTED]> wrote: > 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? GDOS - Disciple G+DOS - +D (What does the G stand for?) > I'd like to kno

Re: Let's discuss ZX Spectrum games

2005-01-13 Thread Wolfgang Haller
I've implemented a quick test version that does a temporary disk image switch when attempting to boot from a non-bootable disk. It loads only DOS from the switched disk, returning to the original disk for the AUTO* file search (if required). In the options you just specify the path of

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread hookares
--- Frode Tenneboe <[EMAIL PROTECTED]> wrote: > On Thu, 13 Jan 2005 06:27:31 +0100 "Aley Keprt" > <[EMAIL PROTECTED]> wrote: > > 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? > > GDOS - Di

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread hookares
--- hookares <[EMAIL PROTECTED]> wrote: > --- Frode Tenneboe <[EMAIL PROTECTED]> > > GDOS - Disciple > > G+DOS - +D > > > > (What does the G stand for?) Gordon - as in Brucey

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Aley Keprt
On Thu, 13 Jan 2005 06:38:06 +0100 "Aley Keprt" <[EMAIL PROTECTED]> wrote: Oh, and does it mean that I can have SAMDOS at arbitrary directory slot as long as its body occupies tracks 4 and 5? If you say that ROM loads directly track 4... :-) The SAM ROM only loads the sector at track 4, secto

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Frode Tenneboe
On Thu, 13 Jan 2005 11:31:42 +0100 "Aley Keprt" <[EMAIL PROTECTED]> wrote: > > Please read again what I suggested. If you say that Sam ROM reads just track > 4 sector 1, it means that I AM correct. Yet again, if you say that Sam ROM > doesn't know about directory, that means I AM correct. Ah. S

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Edwin Blink
From: Frode Tenneboe <[EMAIL PROTECTED]> >But you could put the rest of the DOS anywhere you like on the disc. Cookie >did that to "good" effect in MaxiDOS/QDOS where he put the DOS on tracks 80-82. Just side one BTW if you wish you could store DOS anywhere into the directory as long as there is

RE: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Geoff Winkless
Frode Tenneboe wrote: > On Thu, 13 Jan 2005 11:31:42 +0100 "Aley Keprt" <[EMAIL PROTECTED]> wrote: >> >> Please read again what I suggested. If you say that Sam ROM reads >> just track 4 sector 1, it means that I AM correct. Yet again, if you >> say that Sam ROM doesn't know about directory, that

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Aley Keprt
Nice. :-) I would possibly add an option to ASCD to create such "better" disks where DOS is outside the first 80 tracks. But how to do it exactly? What procedure uses the regular SAMDOS2 to load itself? It uses the standard procedure? I mean does it check two last bytes of each sector to find

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Andrew Collier
On Thu, 2005-01-13 at 13:05, Aley Keprt wrote: > What procedure uses the regular SAMDOS2 to load > itself? It uses the standard procedure? I mean does it check two last bytes > of each sector to find the next one? I am suspicious about this. As fas as I > remember sometimes I had hard times try

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Andrew Collier
On Thu, 2005-01-13 at 12:11, Edwin Blink wrote: > BTW if you wish you could store DOS anywhere into the directory as long as > there is one slot before it that has both filetype and 1st char of filename > zero to mark > end of directory. I seem to remember that SAMDOS needs to find a whole secto

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Edwin Blink
From: Andrew Collier <[EMAIL PROTECTED]> > I seem to remember that SAMDOS needs to find a whole sector clear, so > you'd need two empty entries. (Or perhaps it only checked for the zero > marker at the start of the zero marker, and not 256 bytes in.) Just the first two bytes try this funny thin

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Frode Tenneboe
On Thu, 13 Jan 2005 13:14:04 + Andrew Collier <[EMAIL PROTECTED]> wrote: > On Thu, 2005-01-13 at 13:05, Aley Keprt wrote: > > > What procedure uses the regular SAMDOS2 to load > > itself? It uses the standard procedure? I mean does it check two last bytes > > of each sector to find the next

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Frode Tenneboe
On Thu, 13 Jan 2005 13:11:45 +0100 "Edwin Blink" <[EMAIL PROTECTED]> wrote: > > Just side one. Tracks are always on just one of the sides. Cylinders are on both (or all, for multi platter devices). :) -Frode -- ^ Frode Tennebø | email: [EMAIL PROTECTED] ^ | Ericsson AS | Ise

RE: Comet->ASCII

2005-01-13 Thread Simon Cooke
Hey! Mine converts both ways too! What files does it fail on, Andrew? > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Edwin Blink > Sent: Tuesday, January 11, 2005 3:02 AM > To: sam-users@nvg.ntnu.no > Subject: Re: Comet->ASCII > > > From: Andre

Re: How ROM knowns wheter a disk is "bootable"

2005-01-13 Thread Stuart Brady
On Thu, Jan 13, 2005 at 03:14:06PM +0100, Frode Tenneboe wrote: > On Thu, 13 Jan 2005 13:11:45 +0100 "Edwin Blink" <[EMAIL PROTECTED]> wrote: > > > > Just side one. > > Tracks are always on just one of the sides. Cylinders are on > both (or all, for multi platter devices). :) On the SAM, "cylind

Re: Comet->ASCII

2005-01-13 Thread Edwin Blink
From: Simon Cooke <[EMAIL PROTECTED]> > Hey! Mine converts both ways too! For PC too ? Edwin