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diff --git a/README.md b/README.md index bc6f37cd..46910473 100644 --- a/README.md +++ b/README.md @@ -70,16 +70,17 @@ translated above: } ``` -Most instructions here translate to a single machine code instruction. -Programs must specify registers when they want to use them. Functions always -return results in registers. Execution begins at the function `main`, which -always returns its result in register `ebx`. [The post on Mu](http://akkartik.name/post/mu-2019-2) +There are no expressions, only statements that operate on variables. Most +statements in Mu translate to a single machine code instruction. Variables +reside in memory by default. Programs must specify registers when they want to +use them. Functions must return results in registers. Execution begins at the +function `main`, which always returns its result in register `ebx`. [This post](http://akkartik.name/post/mu-2019-2) has more details. ## SubX -Mu is built out of a thin syntax called SubX for programming in (a subset of) -x86 machine code. Here's a program (`apps/ex1.subx`) that returns 42: +Mu is written in [a notation for a subset of x86 machine code called SubX](http://akkartik.name/post/mu-2019-1). +Here's a program (`apps/ex1.subx`) that returns 42: ```sh bb/copy-to-ebx 0x2a/imm32 # 42 in hex @@ -158,7 +159,7 @@ You can use SubX to translate itself. For example, running natively on Linux: Or, running in a VM on other platforms (much slower): ```sh - $ ./translate_subx_emulated init.linux ex1.subx # generates identical a.elf to above + $ ./translate_subx_emulated init.linux apps/ex1.subx # generates identical a.elf to above $ ./bootstrap run a.elf $ echo $? 42 |