00 00 00 00         ; this is an example binary source file
repeat(5,8f)        ; 5 0x8f bytes
repeat(hex(a),bb)   ; 10 0xbb bytes
repeat(0x40,00)     ; 64 0x00 bytes
;      ^ 0x prefix works too
ff                  ; single byte
00000000            ; 32-bit number
;                   ^ this is the comment character