ARM assembly hexadecimal representation recipes - zhuowei/MinecraftPEModWiki GitHub Wiki
movs: stores a number into a register
(number you want to move) (0x20 + register number you want to move number into)
movs r5, #64 (0x40) = 40 25
movs r3, #255 (0xff) = ff 23
bx lr: returns from a function
70 47
nop: does nothing
00 bf
Handy guides:
http://www.heyrick.co.uk/assembler/
http://bear.ces.cwru.edu/eecs_382/ARM7-TDMI-manual-pt3.pdf
http://www.peter-cockerell.net/aalp/html/ch-3.html