(1) The ASCII code for [ENTER] is 13, the code for backspace is 8, etc... What's the code for [GRPH]?

(2) What is the DEFUSR-code for 'cleaning' the keyboard-buffer?

GRPH is a modifier key, it has no code of its own.

&H156 if I'm not mistaken.

Thank you for the defusr code!

I searched the code for GRPH for a long time, now I understand why I couldn't find it.
Do you know how to they solve that in games, control wise?
Not by reading the key-input in ascii codes?

They probably read the keyboard directly, using z80 ports 0xa9 and 0xaa, which are 'connected' to the PPI.

if you uses the MSX-BIOS, you can know with PEEK the key status... the buffer sucks for gaming.

PD: if your gameplay routine is in assembler, make sure to not dissabled interrupts.

GRPH code

A=PEEK(&HFBE5+6) and 4

"6" is the row number.... 4 is &B000000100 so you can read only the BIT 2 status.

A= 0 key pressed now
A<>0 key NOT pressed now

bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 
row 0 7 & 6 ^ 5 % 4 $ 3 # 2 @ 1 ! 0 ) 
row 1 ; : ] } [ { \ ¦ = + - _ 9 ( 8 * 
row 2 B A DEAD / ? . > , < ` ~ ' " 
row 3 J I H G F E D C 
row 4 R Q P O N M L K 
row 5 Z Y X W V U T S 
row 6 F3 F2 F1 CODE CAPS GRAPH CTRL SHIFT 
row 7 RET SELECT BS STOP TAB ESC F5 F4 
row 8 → ↓ ↑ ← DEL INS HOME SPACE 
row 9 NUM4 NUM3 NUM2 NUM1 NUM0 NUM/ NUM+ NUM* 
row 10 NUM. NUM, NUM- NUM9 NUM8 NUM7 NUM6 NUM5 

PD: http://map.tni.nl rocks
and was quicky that looking for in between 2000 files that i have without caring in a only one folder A DISSASTER!.

Well, thanks. Rather interesting material!

That's right. you've gotta read the keyboard matrix which in not the same on every machine! (there are a few exeptions like US, German, French and Jap keyboards)

Graph key is like Shift and Control key; a status key which have no ascii value.

well, iirc, ros6,7,8 are standarized, the differences is in the others rows.