diff --git a/README.adoc b/README.adoc
index 494e90d..2ae1193 100644
--- a/README.adoc
+++ b/README.adoc
@@ -7259,7 +7259,11 @@ Breakdown:
 * `.1` as in `@start_kernel.1`: index of the microop
 * `stp`: instruction disassembly. Seems to use `.isa` files dispersed per arch, which is an in house format: http://gem5.org/ISA_description_system
 * `strxi_uop   x29, [ureg0]`: microop disassembly.
-* `MemWrite :  D=0x0000000000000000 A=0xffffff8008913f90`: TODO. Further description of the microops.
+* `MemWrite :  D=0x0000000000000000 A=0xffffff8008913f90`: a memory write microop:
+** `D` stands for data, and represents the value that was written to memory or to a register
+** `A` stands for address, and represents the address to which the value was written. It only shows when data is being written to memory, but not to registers.
+
+The best way to verify all of this is to write some bare metal code: https://stackoverflow.com/questions/43682311/uart-communication-in-gem5-with-arm-bare-metal
 
 Trace the source lines just like <<trace-source-lines,for QEMU>> with: