SYS_FS_INIT
initialize FAT32 filesystem
do not use this call
SYS_FS_OPENFILE
prepare file for reading or writing
file must exist on SD card
HL: pointer to 8+3 file name
returns
CF: set if file not exists
HL, DE: 4 bytes file size
SYS_FS_CHDIR
change directory
HL: pointer to 8+3 file name
if filename is "/" then directory will be changed to root
returns
CF: reset if successful
LD HL, FILENAME
CALL SYS_FS_CHDIR
...
FILENAME:
.TEXT "SUBDIRXX123"
SYS_FS_BROWSE
browse directory records
CF: set - browse from begining, reset - find next record
returns
CF: set - no more records
IX: pointer to directory record
0..10 - 8+3 filename
11 - file attributes
28..31 - filesize
SCF ; first record
LIST_DIR:
CALL SYS_FS_BROWSE
RET C ; no more records
.... ; check record, etc.
XOR A ; next record
JR LIST_DIR
SYS_FS_GETFILE
load file from card to RAM
HL: pointer to 8+3 filename
DE: RAM address to write
SYS_FS_RUNFILE
load and run program
HL: pointer to 8+3 filename
DE: RAM address to write, launching address
SYS_INI_OPEN
open Windows INI file
HL: pointer to 8+3 file name
DE: pointer to memory address where infile will be temporarily stored
returns
CF: set if inifile not exists or reading error or file size is more than 512B
SYS_INI_KEY
find key
HL: pointer to key name ("=" terminated)
returns
HL: pointer to data
B: length of data
LD HL, ININAME
LD DE, 9000h
CALL SYS_INI_OPEN
JR C, NOINIFILE
LD HL, KEY1
CALL SYS_INI_KEY
JR C, NOKEY
....
ININAME:
.TEXT "INITEST1INI"
KEY1:
.TEXT "PARAMETER1="
Low level calls:
SYS_FS_WR_SEC
write one sector (512B)
SYS_FS_RD_SEC
read one sector
SYS_FS_NEXT_SEC
move to next sector