73 lines
1.6 KiB
PHP
73 lines
1.6 KiB
PHP
; ==================================================
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; Orion-128 computer
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;
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; ORDOS (Orion-DOS) System calls
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; Disassembled by Romychs @ 2026-10-08
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; ==================================================
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; ORDOS Write max disk size
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ORD_WMAX EQU 0xbfc4
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; ORDOS Read file attributes
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; Out: HL -> file address in memory,
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; DE - file size,
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; BC -> directory address after search
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ORD_ATFM EQU 0xbfc7
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; ORDOS Write start/end address of file buffer in RAM
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ORD_WATF EQU 0xbfca
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; ORDOS Read address of file buffer in RAM
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ORD_ATF EQU 0xbfcd
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; ORDOS Set address of filename buffer
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; Inp: HL -> filename
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ORD_SDNA EQU 0xbfd0
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; ORDOS Read address of filename buffer
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ORD_LDMA EQU 0xbfd3
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; ORDOS Set current drive
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; Inp: A - 'A' or 'B' drive letter
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ORD_WND EQU 0xbfd6
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; ORDOS Read byte from disk
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; Inp: HL -address.
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; Out: A - byte from disk
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ORD_RDISK EQU 0xbfdc
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; ORDOS Write byte to disk
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; Inp: HL -address,
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; A - byte to write
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ORD_WDISK EQU 0xbfdf
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ORD_STOP EQU 0xbfe2
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; ORDOS Search file on disk
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; Inp: Filename will be set before call
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; Out: A = 0 - not found, 0xff - found
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; HL -> stop byte if not found, of file header if found
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ORD_PSCF EQU 0xbfe5
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; ORDOS Read current disk name
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ORD_RND EQU 0xbfe9
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; ORDOS Erase disk file
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ORD_ERAS EQU 0xbfee
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; ORDOS Open sequential file for read
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ORD_OFILL EQU 0xbff1
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; ORDOS Close sequential file
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ODR_CFILL EQU 0xbff4
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; ORDOS Write file on disk
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ORD_WFILE EQU 0xbff7
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; ORDOS Read file from disk
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; Out: A = 0 - ok, 1 - file not found, 0x80 - COM file
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; HL -> start address of buffer
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; SP+2 -> return to OS address
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ORD_RFILE EQU 0xbffa
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