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mos_api.inc
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;
; Title: AGON MOS - API for user projects
; Author: Dean Belfield
; Created: 03/08/2022
; Last Updated: 11/11/2023
;
; Modinfo:
; 05/08/2022: Added mos_feof
; 09/08/2022: Added system variables: cursorX, cursorY
; 18/08/2022: Added system variables: scrchar, scrpixel, audioChannel, audioSuccess, vpd_pflags
; 05/09/2022: Added mos_ren, vdp_pflag_mode
; 24/09/2022: Added mos_getError, mos_mkdir
; 13/10/2022: Added mos_oscli
; 23/02/2023: Added more sysvars, fixed typo in sysvar_audioSuccess, offsets for sysvar_scrCols, sysvar_scrRows
; 04/03/2023: Added sysvar_scrpixelIndex
; 08/03/2023: Renamed sysvar_keycode to sysvar_keyascii, added sysvar_vkeycode
; 15/03/2023: Added mos_copy, mos_getrtc, mos_setrtc, rtc, vdp_pflag_rtc
; 21/03/2023: Added mos_setintvector, sysvars for keyboard status, vdu codes for vdp
; 22/03/2023: The VDP commands are now indexed from 0x80
; 29/03/2023: Added mos_uopen, mos_uclose, mos_ugetc, mos_uputc
; 13/04/2023: Added FatFS file structures (FFOBJID, FIL, DIR, FILINFO)
; 15/04/2023: Added mos_getfil, mos_fread, mos_fwrite and mos_flseek
; 19/05/2023: Added sysvar_scrMode
; 05/06/2023: Added sysvar_rtcEnable
; 03/08/2023: Added mos_setkbvector
; 10/08/2023: Added mos_getkbmap
; 11/11/2023: Added mos_i2c_open, mos_i2c_close, mos_i2c_write and mos_i2c_read
; 09/04/2024: Adapter to ez80asm
; VDP control (VDU 23, 0, n)
;
vdp_gp: EQU 80h
vdp_keycode: EQU 81h
vdp_cursor: EQU 82h
vdp_scrchar: EQU 83h
vdp_scrpixel: EQU 84h
vdp_audio: EQU 85h
vdp_mode: EQU 86h
vdp_rtc: EQU 87h
vdp_keystate: EQU 88h
vdp_logicalcoords: EQU C0h
vdp_terminalmode: EQU FFh
; MOS high level functions
;
mos_getkey: EQU 00h
mos_load: EQU 01h
mos_save: EQU 02h
mos_cd: EQU 03h
mos_dir: EQU 04h
mos_del: EQU 05h
mos_ren: EQU 06h
mos_mkdir: EQU 07h
mos_sysvars: EQU 08h
mos_editline: EQU 09h
mos_fopen: EQU 0Ah
mos_fclose: EQU 0Bh
mos_fgetc: EQU 0Ch
mos_fputc: EQU 0Dh
mos_feof: EQU 0Eh
mos_getError: EQU 0Fh
mos_oscli: EQU 10h
mos_copy: EQU 11h
mos_getrtc: EQU 12h
mos_setrtc: EQU 13h
mos_setintvector: EQU 14h
mos_uopen: EQU 15h
mos_uclose: EQU 16h
mos_ugetc: EQU 17h
mos_uputc: EQU 18h
mos_getfil: EQU 19h
mos_fread: EQU 1Ah
mos_fwrite: EQU 1Bh
mos_flseek: EQU 1Ch
mos_setkbvector: EQU 1Dh
mos_getkbmap: EQU 1Eh
mos_i2c_open: EQU 1Fh
mos_i2c_close: EQU 20h
mos_i2c_write: EQU 21h
mos_i2c_read: EQU 22h
; FatFS file access functions
;
ffs_fopen: EQU 80h
ffs_fclose: EQU 81h
ffs_fread: EQU 82h
ffs_fwrite: EQU 83h
ffs_flseek: EQU 84h
ffs_ftruncate: EQU 85h
ffs_fsync: EQU 86h
ffs_fforward: EQU 87h
ffs_fexpand: EQU 88h
ffs_fgets: EQU 89h
ffs_fputc: EQU 8Ah
ffs_fputs: EQU 8Bh
ffs_fprintf: EQU 8Ch
ffs_ftell: EQU 8Dh
ffs_feof: EQU 8Eh
ffs_fsize: EQU 8Fh
ffs_ferror: EQU 90h
; FatFS directory access functions
;
ffs_dopen: EQU 91h
ffs_dclose: EQU 92h
ffs_dread: EQU 93h
ffs_dfindfirst: EQU 94h
ffs_dfindnext: EQU 95h
; FatFS file and directory management functions
;
ffs_stat: EQU 96h
ffs_unlink: EQU 97h
ffs_rename: EQU 98h
ffs_chmod: EQU 99h
ffs_utime: EQU 9Ah
ffs_mkdir: EQU 9Bh
ffs_chdir: EQU 9Ch
ffs_chdrive: EQU 9Dh
ffs_getcwd: EQU 9Eh
; FatFS volume management and system configuration functions
;
ffs_mount: EQU 9Fh
ffs_mkfs: EQU A0h
ffs_fdisk: EQU A1h
ffs_getfree: EQU A2h
ffs_getlabel: EQU A3h
ffs_setlabel: EQU A4h
ffs_setcp: EQU A5h
; File access modes
;
fa_read: EQU 01h
fa_write: EQU 02h
fa_open_existing: EQU 00h
fa_create_new: EQU 04h
fa_create_always: EQU 08h
fa_open_always: EQU 10h
fa_open_append: EQU 30h
; System variable indexes for api_sysvars
; Index into _sysvars in globals.asm
;
sysvar_time: EQU 00h ; 4: Clock timer in centiseconds (incremented by 2 every VBLANK)
sysvar_vpd_pflags: EQU 04h ; 1: Flags to indicate completion of VDP commands
sysvar_keyascii: EQU 05h ; 1: ASCII keycode, or 0 if no key is pressed
sysvar_keymods: EQU 06h ; 1: Keycode modifiers
sysvar_cursorX: EQU 07h ; 1: Cursor X position
sysvar_cursorY: EQU 08h ; 1: Cursor Y position
sysvar_scrchar: EQU 09h ; 1: Character read from screen
sysvar_scrpixel: EQU 0Ah ; 3: Pixel data read from screen (R,B,G)
sysvar_audioChannel: EQU 0Dh ; 1: Audio channel
sysvar_audioSuccess: EQU 0Eh ; 1: Audio channel note queued (0 = no, 1 = yes)
sysvar_scrWidth: EQU 0Fh ; 2: Screen width in pixels
sysvar_scrHeight: EQU 11h ; 2: Screen height in pixels
sysvar_scrCols: EQU 13h ; 1: Screen columns in characters
sysvar_scrRows: EQU 14h ; 1: Screen rows in characters
sysvar_scrColours: EQU 15h ; 1: Number of colours displayed
sysvar_scrpixelIndex: EQU 16h ; 1: Index of pixel data read from screen
sysvar_vkeycode: EQU 17h ; 1: Virtual key code from FabGL
sysvar_vkeydown: EQU 18h ; 1: Virtual key state from FabGL (0=up, 1=down)
sysvar_vkeycount: EQU 19h ; 1: Incremented every time a key packet is received
sysvar_rtc: EQU 1Ah ; 6: Real time clock data
sysvar_spare: EQU 20h ; 2: Spare, previously used by rtc
sysvar_keydelay: EQU 22h ; 2: Keyboard repeat delay
sysvar_keyrate: EQU 24h ; 2: Keyboard repeat reat
sysvar_keyled: EQU 26h ; 1: Keyboard LED status
sysvar_scrMode: EQU 27h ; 1: Screen mode
sysvar_rtcEnable: EQU 28h ; 1: RTC enable flag (0: disabled, 1: use ESP32 RTC)
sysvar_mouseX: EQU 29h ; 2: Mouse X position
sysvar_mouseY: EQU 2Bh ; 2: Mouse Y position
sysvar_mouseButtons: EQU 2Dh ; 1: Mouse button state
sysvar_mouseWheel: EQU 2Eh ; 1: Mouse wheel delta
sysvar_mouseXDelta: EQU 2Fh ; 2: Mouse X delta
sysvar_mouseYDelta: EQU 31h ; 2: Mouse Y delta
; Flags for the VPD protocol
;
vdp_pflag_cursor: EQU 00000001b
vdp_pflag_scrchar: EQU 00000010b
vdp_pflag_point: EQU 00000100b
vdp_pflag_audio: EQU 00001000b
vdp_pflag_mode: EQU 00010000b
vdp_pflag_rtc: EQU 00100000b
vdp_pflag_mouse: EQU 01000000b
; vdp_pflag_buffered: EQU 10000000b
;
; FatFS structures
; These mirror the structures contained in src_fatfs/ff.h in the MOS project
;
; Object ID and allocation information (FFOBJID)
;
;FFOBJID .STRUCT
; fs: DS 3 ; Pointer to the hosting volume of this object
; id: DS 2 ; Hosting volume mount ID
; attr: DS 1 ; Object attribute;
; stat: DS 1 ; Object chain status (b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched)
; sclust: DS 4 ; Object data start cluster (0:no cluster or root directory)
; objsize: DS 4 ; Object size (valid when sclust != 0)
;FFOBJID_SIZE .ENDSTRUCT FFOBJID
;
; File object structure (FIL)
;
;FIL .STRUCT
; obj: .TAG FFOBJID ; Object identifier
; flag: DS 1 ; File status flags
; err: DS 1 ; Abort flag (error code)
; fptr: DS 4 ; File read/write pointer (Zeroed on file open)
; clust: DS 4 ; Current cluster of fpter (invalid when fptr is 0)
; sect: DS 4 ; Sector number appearing in buf[] (0:invalid)
; dir_sect: DS 4 ; Sector number containing the directory entry
; dir_ptr: DS 3 ; Pointer to the directory entry in the win[]
;FIL_SIZE .ENDSTRUCT FIL
;
; Directory object structure (DIR)
;
;DIR .STRUCT
; obj: .TAG FFOBJID ; Object identifier;
; dptr: DS 4 ; Current read/write offset
; clust: DS 4 ; Current cluster
; sect: DS 4 ; Current sector (0:Read operation has terminated)
; dir: DS 3 ; Pointer to the directory item in the win[]
; fn: DS 12 ; SFN (in/out) {body[8],ext[3],status[1]}
; blk_ofs: DS 4 ; Offset of current entry block being processed (0xFFFFFFFF:Invalid)
;DIR_SIZE .ENDSTRUCT DIR
;
; File information structure (FILINFO)
;
;FILINFO .STRUCT
; fsize: DS 4 ; File size
; fdate: DS 2 ; Modified date;
; ftime: DS 2 ; Modified time
; fattrib: DS 1 ; File attribute
; altname: DS 13 ; Alternative file name
; fname: DS 256 ; Primary file name
;FILINFO_SIZE .ENDSTRUCT FILINFO
;
; Macro for calling the API
; Parameters:
; - function: One of the function numbers listed above
;
MACRO MOSCALL function
LD A, function
RST.L 08h
ENDMACRO