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Re: Salora Manager Disk ROM
Posted: Fri Apr 22, 2016 2:14 pm
by @username@
Appledos 3.3 for sure uses a similar system but with 16 sectors so not 100% compatible. MS-DOS has a different strategy, and a completely different encoding system.
For the most part though, Laser DOS is a modified AppleDOS 3.3
Sector skew for AppleDOS is
Code: Select all
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 7 E 6 D 5 C 4 B 3 A 2 9 1 8 F
I would imagine any bitmap based allocation would indeed have some gaps, from file deletion for example.
Re: Salora Manager Disk ROM
Posted: Sat Apr 23, 2016 8:40 am
by MADrigal
Thanks for the clarification
Re: Salora Manager Disk ROM
Posted: Sat Apr 23, 2016 12:19 pm
by @username@
This is a short BASIC program to read individual disc sectors.
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10 GOSUB 20000
20 GOSUB 10000
30 T = 17:S = 4
40 GOSUB 30000
50 GOSUB 40000
60 FOR B = 0 TO 255
70 PRINT CHR$ ( PEEK (BP + B));
80 NEXT B
90 END
10000 REM ********************
10010 REM * LASER DOS V1.0
10020 REM * I/O INITIALISE
10030 REM ********************
10040 FOR I = 20208 TO 20253
10050 POKE I,0
10060 NEXT I
10070 POKE 20246,96
10080 POKE 20247,1
10090 POKE 20248,255
10100 POKE 20249,17
10110 CALL 11031
10120 RETURN
19999 :
20000 REM ********************
20010 REM * LOAD SECTOR SWAPS
20020 REM ********************
20030 DIM TS(13)
20040 DATA 0,7,8,6,13,5,12,4,11,3,10,2,9,1
20050 FOR I = 0 TO 13
20060 READ A%
20070 TS(I) = A%
20080 NEXT I
20090 RETURN
29999 :
30000 REM *******************
30010 REM * READ SECTOR
30020 REM *******************
30030 POKE 20255,T
30040 POKE 20256,TS(S)
30050 POKE 20263,1
30060 CALL 11141
30070 RETURN
39999 :
40000 REM ********************
40010 REM * GET BUFFER POINTER
40020 REM ********************
40030 BP = PEEK (63) * 256
40040 BP = BP + PEEK (62)
40050 RETURN
As it stands, it will list the printable characters from the first directory table - track 17, sector 4.
An interesting discovery here is that the controller was designed to manage two drives - 1 and 2. It has confirmed that the missing MMIO of $118B, is drive select for drive 2
Re: Salora Manager Disk ROM
Posted: Mon May 02, 2016 5:02 pm
by @username@
Disc ROM Input Output Control Block
The IO control block for LaserDOS is located at $4F1B
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Offset Detail
---------------
$00 Table type - always $01
$01 Slot number - always $60 (AppleDOS slot $60, here used as X offset)
$02 Drive number - $01 or $02 - default to $01
$03 Volume number - $FF == any volume
$04 Track number - $00 to $27
$05 Sector number - $00 to $0D - Translated format
$06-$07 Device Character Table - set by ROM to $2FAC - see next
$08-$09 Buffer pointer - 256 byte data buffer
$0A Unused - always $00
$0B Byte count of partial sector ($00==256)
$0C Command codes $00 = SEEK, $01 = READ, $02 = WRITE, $04 = FORMAT
$0D Return codes $00 = No Error, $08 = Error initialising, $10 = Write Protect Error, $20 = Volume mismatch Error, $40 = Drive Error, $80 = Read Error
$0E Volume last accessed - Set by DIR
$0F Slot number of last access - always $60
$10 Drive number of last access
Device Characteristics Table at ROM $2FAC
Offset Detail
---------------
$00 Device type - ROM has $00 == Apple Disk II :)
$01 Phases per track - ROM has $01
$02-$03 Motor on time count - ROM has $D8EF - same as Apple Disk II :)
To use in a program :
1) JSR $2709 - Set defaults for I/O block. Also set $4F18 to $FF
2) Set defaults for track, sector, command code and buffer pointers
3) JSR $2B85 - go READ/WRITE the sector
4) Check $4F28 for error condition
That's all there is to it!
Re: Salora Manager Disk ROM
Posted: Wed Mar 08, 2023 8:46 pm
by @username@
Tonight I was looking at the DISK.ROM disassembly, and noticed the EXEC command, which does not seem to be in the Disk Manual.
Possibly Google translate has made EXEC into something else, it translates the DIR command to YOU
EXEC files are little batch files, and is further evidence of the AppleDOS rip-off!
First create a short text file with the commands HOME and DIR.
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5 REM *** Open and write to file TEST"
10 DISK "OPEN TEST"
20 DISK "WRITE TEST"
30 PRINT "HOME": PRINT "DIR
40 DISK "CLOSE TEST"
55 REM *** Read back data as test
50 DISK "OPEN TEST"
60 DISK "READ TEST,B0"
70 INPUT A$
80 INPUT A$
90 DISK "CLOSE TEST"
Now to run your batch file, just type EXEC TEST
Re: Salora Manager Disk ROM
Posted: Thu Mar 16, 2023 8:03 pm
by @username@
Today I was looking through the latest Mame release files and stumbled upon the attached for the Laser 2001.
I think it is an attempt to copy a floppy disk - but sadly has missing sectors. Perhaps used Apple sector count instead of Laser DOS?
The file identifies as 'Kaarne' which google translates to 'Raven'.
The really interesting part to me is the following, which is reconstructed by fudging the linked list over the missing sector.
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10010 PRINT CHR$ (5)"sssssssssssssssssssssssssssssssssssss" TAB( 34)"s";
10100 PRINT "s g g g g g g ebbd eded ebbl s";
10110 PRINT "s a a ebbd ebbd a a aaaa a s";
10120 PRINT "s aebc a a a a aebc afca a s";
10130 PRINT "s afd abba abba afd a a abbl s";
10140 PRINT "s a fd a a a a a fd a a a s";
10150 PRINT "s k h h k h k k h h k fbbl s";
10160 PRINT "s" TAB( 34)"s";
10200 PRINT "ssssssssssssssssssssssssssssssssssss"
10210 PRINT " (C) 1984 SALORA OY "
10220 PRINT "ssssssssssssssssssssssssssssssssssss"
So this is officially copyright by Salora Ltd.
I have also included the BASIC in as much as I can reconstruct. Maybe some Finnish forum members can tell us more!
Re: Salora Manager Disk ROM
Posted: Fri Mar 17, 2023 6:50 am
by Scouter3d
Hi, what a find!!!!
the filename reads "Kaarmepeli.img" (with an "m") which would translate "kaarme" to "snake" ?
Strange thing: some variables are named in german! Like "apfel (apple)", "wurm (worm)", "punkte (points)"....
Maybe this is a conversion from another platform? Maybe from the Salora Fellow?
Cheers, TOM:0)
Re: Salora Manager Disk ROM
Posted: Fri Mar 17, 2023 7:07 am
by Scouter3d
or even "käärme"...
Re: Salora Manager Disk ROM
Posted: Fri Mar 17, 2023 8:32 am
by Scouter3d
Hi, this should be on the Salora Games collection Disk!!!!!! See the snake on the cover :0)
http://www.madrigaldesign.it/creativemu ... .php?id=32
Would be great if the Disks in the collection will one day be dumped...
Cheers, TOM:0)
Re: Salora Manager Disk ROM
Posted: Fri Mar 17, 2023 9:01 am
by MADrigal
I have disks, floppy disk drive, manager and interface. I haven't tested anything cause I miss the power supply for the drive and still we don't know how to transfer the data to a proper file.