Testing the plugin
This plugin is used by rasm2 and r2. You can verify that the plugin is properly loaded with this command:
$ rasm2 -L | grep mycpu
_d mycpu My CPU disassembler (LGPL3)
Let's open an empty file using the 'mycpu' arch and write some random code there.
$ r2 -
-- I endians swap
[0x00000000]> e asm.arch=mycpu
[0x00000000]> woR
[0x00000000]> pd 10
0x00000000 888e mov r8, 14
0x00000002 b2a5 ifnot r10, r5
0x00000004 3f67 ret
0x00000006 7ef6 bl r15, r6
0x00000008 2701 xor r0, 1
0x0000000a 9826 mov r2, 6
0x0000000c 478d xor r8, 13
0x0000000e 6b6b store r6, 11
0x00000010 1382 add r8, r2
0x00000012 7f15 ret
Yay! it works.. and the mandatory oneliner too!
$ r2 -nqamycpu -cwoR -cpd' 10' -