; 0x00 -> print register a as char ; 0x01 -> print register a as int ; ; 0xFF -> Halt ; 0xFE -> Error Interupt ; 0xF6 -> put keycode of currently pressed key in A register ; and but a value (bool)(0 or 1) into b register to ; indicate whether it is the first time this key has been ; pressed. ; ; ; 0x70 -> Init graphics, ; (A) mode ; (B) X resolution ; (C) Y Resulution ; 0x71 -> Set Pixel, (bitmap mode) ; (A) Color (0x000000 to 0xFFFFFF) ; (B) x position ; (C) y position ; 0x72 -> Set Char, (Text Mode) ; (A) Character Code ; (B) Cursor Position ; (C) Color (0x000000 to 0xFFFFFF) ; ; ; ! ALLL FILESYSTEM DRIVE NUMBER ARE LOCAL FILES ! ; drive( drive number (0 to 9)).bin ; "drive8.bin" ; ; drive number -> ( 0 to 9 ) ; sector number -> ( 0 to 15 ) ; byte offset -> ( 0 to 254 ) ; ; 0x80 -> read byte from disk ; (A) drive number ; (B) sector number ; (C) byte offset ; moves output to A register ; 0x81 -> write byte from disk ; (A) drive number ; (B) sector number ; (C) byte offset ; (D) byte to write main: ldw a, 0xFF ; load 255 to A register, Unused str a, 0x0F ; will cause an error because its writing to program memory ; You will have to make the address bigger than the program int 0x00 ; interupt to print a register to terminal as a char (debug) ldw a, 0 ; will be the graphics mode str a, 0xF0 ; copy A register to memory address ldw a, 800 ; screen width str a, 0xF1 ; copy A register to memory address ldw a, 600 ; screen height str a, 0xF2 ; copy A register to memory address jsr _init_graphics_mode init_graphics_mode: push a push b push c ldw g, 0xFF ; This is never used ldr a, 0xF0 ; copy data from memory address to register 'A' ldr b, 0xF1 ; copy data from memory address to register 'B' ldr c, 0xF2 ; copy data from memory address to register 'C' int 0x70 ; all interupts in 0x70 - 0x7F are for graphics, ; only 0x70 to 0x72 are implemented pop b pop a ret