duskos

commit c736051ea77058258104de32e4e2b3fa1dac2ea6
parent e5192d4fd2607da6d919637987080cf5c652cb15
Author: Virgil Dupras <hsoft@hardcoded.net>
Date:   Wed,  1 Jun 2022 13:51:41 -0400

README: a little note about TTY configuration

Diffstat:
M
README.md
 | 
6
++++++
M
dusk.asm
 | 
9
+++------

2 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/README.md b/README.md
@@ -110,6 +110,12 @@ To build Dusk OS, you need:
 Run `make` and then run `./dusk`. You'll get a prompt. Look at `xcomp.txt` and
 `boot.fs` to have an idea of the vocabulary available. Type `bye` to quit.
 
+Dusk OS expects a raw input. With a regular TTY, your input will be buffered
+and echoed twice. To avoid that, you can invoke it like this:
+
+    (stty -icanon -echo; ./dusk; stty icanon echo)
+
+
 [1]: http://collapseos.org
 [2]: http://collapseos.org/why.html
 [3]: https://sr.ht/~vdupras/duskos
diff --git a/dusk.asm b/dusk.asm
@@ -451,7 +451,9 @@ defword 'litn', 4, word_litn, word_shrc
     call word_write
     ret
 
-write_displacement: 
+defword 'call,', 5, word_callwrite, word_litn
+    pspush 0xe8 ; call opcode
+    call word_cwrite
     mov eax, [ebp] ; absolute addr
     sub eax, [here] ; displacement
     sub eax, 4 ; ... from *after* call/jmp op
@@ -459,11 +461,6 @@ write_displacement:
     call word_write
     ret
 
-defword 'call,', 5, word_callwrite, word_litn
-    pspush 0xe8 ; call opcode
-    call word_cwrite
-    jmp write_displacement
-
 defword 'exit,', 5, word_exitwrite, word_callwrite
 word_asmlast:
     pspush 0xc3 ; ret opcode