B-DOS AL 1.5a
Utility
Submitted by Stefan Drissen on Friday, April 5, 2019 - 22:44.
Release Year
2009
Copyrights
Public Domain
Copyright Provenance
Author
Description
AL B-DOS version 1.5a for ATOM-Lite with CF card.
Confusingly several versions of AL 1.5a exist so they are referred to by the timestamp of the DOS file.
Tips
AtomLite+ B-DOS ver. 1.5a Specific Hook Codes Description
All codes in brackets [] in this list are ignored by B-DOS
(just a RETurn from DOS). The hook codes followed with a 'B' are B-DOS
speciffic. A 'M' indicates compatibility with Masterdos. Other hookcodes are
compatible with both SAMDOS and Masterdos.
128 &80 INIT Same as HAUTO.
129 &81 HGTHD Get file header.
130 &82 HLOAD Load data from from file which is selected with HGTHD.
131 &83 HVERY Verify data from from file which is selected with HGTHD.
132 &84 HSAVE Save file.
134 &86 B HVMSAD Verify multiple sectors.
135 &87 B HDINIT Re-initialize B-DOS
136 &88 HAUTO Loads "AUTO*" file.
139 &8B HVAR Expects the DVAR number on the calculator stack.
147 &93 HOFLE Open a new file.
148 &94 HSBYT Save Byte in the A register to the file opened with HOFLE.
149 &95 HWSAD Write a single sector.
150 &96 HSVBK Save a Block to file opened with HOFLE.
152 &98 HCFSM Close file sector map.
156 &9C B HRECORD Select a record.
157 &9D B HVEBK Verifies a block.
158 &9E HGFLE Get file.
159 &9F B HLBYT Load byte from file.
160 &A0 HRSAD Read sector
161 &A1 HLDBK Load a block from file.
162 &A2 M HMRSAD Read Multiple sectors
163 &A3 M HMWSAD Write multiple sectors
164 &A4 HREST Restores last used drive head to track 0
165 &A5 HDIR Clears the screen and outputs a directory to screen.
166 &A6 HERAZ Erase file.
[ SAMDOS: When the hook code explanation refers to 'RPT', it refers to the
pointer used internally by SAMDOS.
128 &80 INIT Same as HAUTO
[ SAMDOS: This routine looks for an AUTO file on the current disk, and
initialises the DVARS. ]
[ MasterDOS: Look for an AUTO file on the current disk. No action (or error)
occurs if there is no AUTO file, otherwise it is loaded (and executed if it is
an auto-running Basic or CODE file). This Hook can only be used in sections B
and C of the memory map. ]
129 &81 HGTHD Get file header. IX points to a tape like
header (file name at IX+1 to IX+14).
file name may include "D1:" or "D2:"
The loaded header can be found at &4B50 in
the system page.
[ SAMDOS: Get file header. This routine should be called with IX pointing to
the UIFA, which should contain the file type and filename required. When
completed the complete file header will be transferred in UIFA form to IX+80
bytes. ]
[ MasterDOS: Get file header. This routine should be called with IX pointing
to the UIFA, which should hold the file type required (at IX+0) and the file
name (at IX+1 to IX+10). The routine looks for the file in the current
directory on the current drive and either returns with an error code, or
transfers the data from the file directory to IX+80, in UIFA form. The calling
code and the UIFA can be in sections B, C or D of the memory map. (Note: this
hook works correctly in SAMDOS, provided that IX=&4B00.)]
130 &82 HLOAD Load data from from file which is selected with HGTHD.
Destination page paged at location C
Destination offset (32768 - 49151)
C =length in 16K pages (0 - 31)
DE =Modulo length (0 - 16383)
[ SAMDOS: Load file in UIFA pointed to by IX register. The C register contains
the number of 16K pages used by the file, while DE must contain the length
modulo 16K. The HL register pair must point to a destination between 8000H to
BFFFH, while the destination page must be paged in using the HMPR register.
These values can be obtained from the header loaded by HGTHD. ]
131 &83 HVERY Verify data from from file which is selected with HGTHD.
Destination page paged at location C
Destination offset (32768 - 49151)
C =length in 16K pages (0 - 31)
DE =Modulo length (0 - 16383)
[ SAMDOS: Verify the memory to the file stored on the disk. Again the IX
register must be a pointer to the file UIFA. Use as HLOAD, but verifies rather
than loads. ]
[ MasterDOS: Like HLOAD, but verify the data on the disk against the data in
memory. Error code 93 returned if verify failed. ]
132 &84 HSAVE Save file. IX should point to a 48 bytes
header containing type, name and file
specific information.
[ SAMDOS: Save the file whose UIFA is pointed to by the IX register. The UIFA
must be a complete UIFA, including file length, etc. ]
[ MasterDOS: Save the file whose UIFA is pointed to by IX. All relevant data
in the UIFA must be complete - for a CODE file, type, name, start, length and
execute address. If in doubt, try a SAVE from BASIC and then look at
&4B00-&4B47 to find the required values. ]
[ MasterDOS: HSKSF 133 (&85) Seek Safe. On some machines, pressing the Reset
button can corrupt the disk sector under the drive head. This is often on the
track containing the last sector of the last file loaded. MasterDOS tries to
minimise the problem by parking the drive head on the last track in the
directory, after a LOAD or a SAVE. This track will be unused unless the
directory is fairly full. Using the HSKSF hook will move the head of the
current drive to the last track in the directory, unless this would be track 4
(which contains the first sector of DOS) in which case track 3 is used
instead. ]
134 &86 B HVMSAD Verify multiple sectors
A = drive number
D = track, E=sector
C = memory page
HL = memory offset (32768 to 49151)
IX = number of sectors
Multiple sectors only works with 512 bytes
sectors.
135 &87 B HDINIT Re-initialize B-DOS,prints BDOS logo
re-inits clock,hard disk and DVARS.
136 &88 HAUTO Loads "AUTO*" file. This file can be BASIC or CODE type.
[ MasterDOS: Like Hook 128, but an error code of 101 is returned if there is
no AUTO file. ]
[ MasterDOS: HSKTD 137 (&89) Seek Track D. Move the drive head of the current
drive to the track specified in the D register. ]
[ MasterDOS: HFMTK 138 (&8A) Format Track. Format the track under the drive
head, using the D register to supply the track number and the E register as
the number of the first sector (1-10). Later sectors will be numbered 1 higher
until 10 is reached and numbering goes back to 1. ]
139 &8B HVAR Expects the DVAR number on the calculator stack.
Restacks the basic address of the required DVAR.
If dvar 39 is addressed the clock DVARS
are updated.
B-DOS also puts the DVAR offset in the
1st two bytes of the DOS page.(See DVARS)
[ SAMDOS: This routine calls the jump table thus unstacking the number
following the DVAR into BC. The routine then supplies the address of the DVAR
by putting it onto the BASIC floating point calculator stack. ]
[ MasterDOS: Supply the address of a DVAR by putting it on the floating point
calculator stack. On entry, the FPCS should hold the desired DVAR number.
Note: it is probably easier to page in DOS (the DOS page is held at &5BC2) and
read the disk variables directly. DVAR 0 is at an offset of &0220 within the
page - this will not change. ]
[ MasterDOS: HEOF 140 (&8C) Supply the End-Of-File status (1 or 0) of a
specified stream. The stream number should be on the FPCS. It will be replaced
by the EOF status. ]
[ MasterDOS: HPTR 141 (&8D) Supply the PTR value for a specified stream. The
stream number on the FPCS is replaced by the PTR value. ]
[ MasterDOS: HPATH 142 (&8E) Supply the current PATH$ on the FPCS. Use CALL
&0124 (JSTKFETCH) to get page (A) offset (DE) and length (BC) of the string. ]
[ MasterDOS: HLDPG 143 (&8F) As Hook 130, but on entry the A register should
hold the page number of the destination address. This need not be paged in. ]
[ MasterDOS: HVEPG 144 (&90) As Hook 131, but on entry the A register holds the
page to verify against. ]
[ MasterDOS: HSDIR 145 (&91) Select Directory. Similar to DIR="name" in Basic.
On entry, the registers hold details of the location and length of the desired
subdirectory name. DE is the offset, A is the page of the name start, and BC
is the name length. ]
[ MasterDOS: HSDIR 145 HOFSM 146 (&92) Open a File Sector Map for an OPENTYPE
file. IX must point to the UIFA. The routine will create the map and clear the
disk buffer. ]
147 &93 HOFLE Open a new file. IX points to a 48 byte
header and 9 header bytes are saved to the
file. Before using this hook poke &5BB9
with 0 to overite existing file.
[ SAMDOS: Open a file on the disk. IX must point to the UIFA. The routine will
create a sector address map, and save the header to the disk and reset pointer
RPT. ]
[ MasterDOS: Open a file on the disk. IX must point to the UIFA. The routine
will create a sector address map, and save a 9-byte header to the disk buffer. ]
148 &94 HSBYT Save Byte in the A register to the file opened with HOFLE.
[ SAMDOS: Save the byte in the Accumulator to the RAM pointed to by the
pointer RPT. If the sector is full the data will be stored in the next sector
pointed to by the sector address map. ]
[ MasterDOS: Save the byte in the A register to the disk file (If the buffer
is full it will be written to the disk and the byte will go into the start of
the next buffer). ]
149 &95 HWSAD Write a single sector.
A=drive number
D = track, E=sector
HL =memory address (16384 to 65024)
[ SAMDOS: D contains the track number, and E contains the sector number. The
Accumulator holds the drive number (1 or 2). Writes the sector pointed to by
the DE register pair. The Accumulator contains the drive number, while the HL
register pair is the pointer to the source data which must be resident in the
64K address map. ]
[ MasterDOS: Write Single Sector. On entry, the A register is the drive number
(1-7) which is used to access the table at DVAR 111 to get the actual drive to
use. D holds the destination track, and E the sector number. HL points to the
source in memory, which must be in sections B, C or D of the memory map. 512
bytes will be written to disk. ]
150 &96 HSVBK Save a Block to file opened with HOFLE.
saves A pages and DE bytes from page
selected in location C starting at HL.
Hl points also to location C in memory.
Note that this hookcode must be used only
in location B (&4000 to &7FFF).
[ SAMDOS: Save a block of data to the disk where the DE register pair points
to -the start of the data, and the BC register pair holds the byte count. ]
[ MasterDOS: Save a block of data to the disk file. The A register holds the
length to save in pages, and DE holds the length MOD 16K. HL points to the
start of the data to save, paged into section C of the memory map. ]
[ MasterDOS: HDBOP 151 (&97) Save BC bytes to the disk file. DE points to the
start of the data to save, paged into section C of the memory map. Used by DOS
to write strings to OPENTYPE files. ]
152 &98 HCFSM Close file sector map. Closes the file
opened with HOFLE and the file is made
in the directory.
[ SAMDOS: Close file sector map. This routine empties the RAM and copies the
header area on to the directory, closes the file, then updates the directory. ]
[ MasterDOS: Close a file. This routine writes the last buffer to a disk file
and creates a directory entry for it. IX should point to the UIFA. ]
[ MasterDOS: HORDER 153 (&99) Sort list into ASCII order. HL should point to
the start of the list in sections B, C or D of the memory map. The BC register
should hold the length of each item in the list, and the DE register the
number of items. The A register specifies the number of characters to sort on.
No paging is performed so the entire list must be paged in by the user before
this hook is called. ]
[ MasterDOS: HRSAD 155 (&A0) Read Single Sector. On entry, the A register is
the drive number (1-7) which is used to access the table at DVAR 111 to get
the actual drive to use. D holds the source track, and E the sector. HL poitns
to the destination in memory, which must be in sections B, C or D of the
memory map. 512 bytes will be read from the disk. ]
156 &9C B HRECORD Select a record. If A = 0 then select
record number HL. Else select record by.
name. HL points to the 16 char. name.
157 &9D B HVEBK Verifies a block. See HSVBK for more details.
158 &9E HGFLE Get file.
[ SAMDOS: Get a file from the disk. The IX register must point to the UIFA.
The return is made with the first sector of the file loaded into RAM and RPT
pointing to the first byte. ]
[ MasterDOS: Get a file from the disk. The IX register must point to the UIFA.
The return is made with the first sector of the file loaded into the disk
buffer and RPT pointing to the first byte. ]
159 &9F B HLBYT Load byte in D register from file.
[ SAMDOS: Load the byte pointed to by RPT from RAM, place it in the
Accumulator, and increment the RPT. When the sector has all been read then the
next sector is loaded from the disk and the pointer adjusted. ]
160 &A0 HRSAD Read sector
A=drive number
D = track, E=sector
HL =memory address (16384 to 65024)
[ SAMDOS: HRSAD D contains the track number and E contains the sector number.
The Accumulator holds the drive number (1 or 2).Reads the sector pointed to by
the DE register pair. The Accumulator contains the drive number, while the HL
register pair is the pointer to the destination. ]
161 &A1 HLDBK Load a block from file. See HSVBK for more details.
[ SAMDOS: Load a block of data from the disk to the memory pointed to by DE
with the block count in BC. ]
[ MasterDOS: Load a block of data from the current disk file. HL points to the
destination of the data in memory, paged into section C of the memory map. The
A register is the length to load, in pages, and DE holds the length MOD 16K. ]
162 &A2 M HMRSAD Read Multiple sectors
A = drive number
D = track, E=sector
C = memory page
HL = memory offset (32768 to 49151)
IX = number of sectors
Multiple sectors only works with 512 bytes
sectors.
[ MasterDOS: Read Multiple Sectors. Equivalent to READ AT in Basic. The A
register is the drive to user (1-7 using DVAR 111 table), D holds the track, E
the sector, C the page and HL the offset (&8000- &BFFF) of the destination. IX
holds the number of sectors to load. ]
163 &A3 M HMWSAD Write multiple sectors
A = drive number
D = track, E=sector
C = memory page
HL = memory offset (32768 to 49151)
IX = number of sectors
Multiple sectors only works with 512 bytes
sectors.
[ MasterDOS: Write Multiple Sectors. Equivalent to WRITE AT in Basic. As above,
but C and HL hold the source address, rather than the destination. ]
164 &A4 HREST Restores last used drive head to track 0
ignored by hard disk
[ SAMDOS: Restore disk drive to track 0. The Accumulator holds the drive
number , ie, 1 or 2. ]
[ MasterDOS: Restore. Move drive head to track 0. The disk need not be
formatted. ]
165 &A5 HDIR Clears the screen and outputs a directory to screen.
A register: =2 short dir,= 4 detailed dir
[ SAMDOS: Perform a directory listing to current stream. ]
[ MasterDOS: Print directory. If the A register holds 2, print a simple
directory. If it holds 4, print a detailed directory. Neither option does a
CLS first. The current stream is used to output. ]
166 &A6 HERAZ Erase file which name is at IX+1 to IX+10
[ SAMDOS: Erase a file from the disk. Register IX must point to the UIFA of
the file to be erased.
[ MasterDOS: ERASE a file from disk. The file name should be at IX+1 to IX+10.]