From 41338a4b23010c607888a57edb22dc8739109cfe Mon Sep 17 00:00:00 2001
From: Virgil Dupras <hsoft@hardcoded.net>
Date: Mon, 4 Nov 2019 10:12:17 -0500
Subject: [PATCH] stdio: add "Accepted characters" comment section

ref #64
---
 kernel/stdio.asm | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/kernel/stdio.asm b/kernel/stdio.asm
index ad43fed..a58b8ee 100644
--- a/kernel/stdio.asm
+++ b/kernel/stdio.asm
@@ -11,6 +11,15 @@
 ;
 ; PutC: Write character specified in A onto the device.
 ;
+; *** Accepted characters ***
+;
+; For now, we're in muddy waters in this regard. We try to stay close to ASCII.
+; Anything over 0x7f is undefined. Both CR and LF are interpreted as "line end".
+; Both BS and DEL mean "delete previous character".
+;
+; When outputting, newlines are marked by CR and LF. Outputting a character
+; deletion is made through BS then space then BS.
+;
 ; *** Defines ***
 ; STDIO_GETC: address of a GetC routine
 ; STDIO_PUTC: address of a PutC routine