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Update documentation

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This commit is contained in:
Remko Tronçon 2022-05-23 21:49:57 +02:00
parent ce54272eb6
commit ff84035919
1 changed files with 13 additions and 6 deletions
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19
src/waforth.wat
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@ -11,13 +11,19 @@
;; module)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; I/O
;; Write a character to the output device
(import "shell" "emit" (func $shell_emit (param i32)))
;; Read input from input device
;; Parameters: target address, maximum size
;; Returns: number of bytes read
(import "shell" "read" (func $shell_read (param i32 i32) (result i32)))
;; Read a single key from the input device
(import "shell" "key" (func $shell_key (result i32)))
;; Load a webassembly module.
;; Parameters: memory offset, size
;; Parameters: WASM bytecode memory offset, size
(import "shell" "load" (func $shell_load (param i32 i32)))
;; Generic signal to shell
@ -28,12 +34,13 @@
;; Function types
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; A regular compiled word is a function without any parameters.
;; (arguments are passed via the stack)
;; A regular compiled word is a function with only the
;; top-of-stack pointer as parameter (and return the new top-of-stack pointer)
;; Arguments are passed via the stack.
(type $word (func (param i32) (result i32)))
;; Words with the 'data' flag set get a pointer to data passed
;; as parameter.
;; Words with the 'data' flag set also get a pointer to data passed
;; as second parameter.
(type $dataWord (func (param i32) (param i32) (result i32)))