[hatari-devel] Re: IKBD, max keys?

[Douglas Little <doug694@xxxxxxxxxxxxxx>]

...confirmed on real hardware. maximum of 2 simultaneous keys of any kind.  :-(  I don't see this documented anywhere and wasn't expecting it.

Hatari seems to impose a more complicated limit which depends on the class of keys being held - up to 4 normal keys plus 2 for arrow keys plus 2 for control keys. Something like that. This is possibly happening on the host, outside of Hatari but it is a notable difference whatever the cause.

 

On 22 July 2013 23:57, Douglas Little <doug694@xxxxxxxxxxxxxx> wrote:

I did some tests this evening and noticed Hatari is allowing a maximum of 6 Atari keys to be held at once.

Tests on a real machine (Falcon, TOS 4.04) appear to show the limit is between 2 and 4 keys, depending on the keys. I'm still confirming this but there does seem to be a difference.

A few questions on this:

- is Hatari implementing this limit of 6, or is it the host machine (PC etc?)

- what is the true limit on the IKBD, if any?

- is the limit the same on all Ataris or does it vary by TOS / hardware etc?

Any input welcome. I'm working on a game that needs complex key combinations and while things work well in Hatari it's not behaving well on a real box.

(some effects seen on a real box: >2 keys ignored, irrelevant scancodes reported when shift+ctrl combos used with arrows and some other keys)

D.