NMI Key?

[WintermuteX]

Kick me if i'm blind, but i can't find the key to invoke an NMI

[thomas]

Page-up. Or page-down, don't remember. One is help, the other is NMI.

[WintermuteX]

Oh, so it's the same key as for the AR3, thx

[WintermuteX]

It seems page up/down are not the right keys ?!?

[thomas]

What do you mean by "NMI" ? The Amiga does not have an NMI key (like "Restore" on the C64). The m68k NMI line is just not used on the Amiga. I don't know if WinUAE has added this feature. I couldn't imagine why it should.

Gruß Thomas

[WintermuteX]

NMI is Interrupt Level 7 ... WinUAE supports it (at least the version history says so) in 0.8.23
The amiga don't have an NMI switch by default, but you can easily solder your own NMI switch (i did that).
An NMI is a perfect way to invoke non system monitor software like BigBrother or Ghostrider (among others) ...
Those Programms are great for debugging purposes and neat functions. The Restore key on the c64 was no real NMI AFAIK i soldered my own NMI switch on the c64 userport (or was it the expansion port? I don't really remember anymore .. shame on me), too.

[WintermuteX]

btw: i'm an idiot .. just kick me ... as stated in the version history: "IRQ level 7 shortcut in input-tab" ...
I simply made the mistake to look after an obvious button "Invoke NMI by: [field]" ...
Thanks for including this feature, Toni =)

[andreas]

Originally posted by thomas
Page-up. Or page-down, don't remember. One is help, the other is NMI.

Originally it is:

PAGE-UP = wake UP Action Replay
(that's how you can easily remember it )

PAGE-DOWN = HELP key
(if you're feeling DOWN, you need HELP )

[thomas]

Originally posted by WintermuteX
NMI is Interrupt Level 7 ... WinUAE supports it (at least the version history says so) in 0.8.23
The amiga don't have an NMI switch by default, but you can easily solder your own NMI switch (i did that).
An NMI is a perfect way to invoke non system monitor software like BigBrother or Ghostrider (among others) ...
Those Programms are great for debugging purposes and neat functions. The Restore key on the c64 was no real NMI AFAIK i soldered my own NMI switch on the c64 userport (or was it the expansion port? I don't really remember anymore .. shame on me), too.

Restore on the C64 keyboard was a real NMI, but it had some electronics which allowed the impulse only last for a very short time. This is why it was not always honored and why people used to hammer the key down.

Well, I don't know it but I assume the wake-up key on the AR creates a NMI. How else should one interrupt any running program at any time ?

[Jope]

Originally posted by thomas
Restore on the C64 keyboard was a real NMI, but it had some electronics which allowed the impulse only last for a very short time. This is why it was not always honored and why people used to hammer the key down.

No electronics, but actually this was because of the Mitsumi keyboard's characteristics..

The rubber conductor (similar to those in Mitsumi made Amiga keyboards) has quite a big resistance, so you need to hit the restore key in order for it to make a low resistance connection and generate a NMI.

This was fixed in the C-64II (small motherboard) revision.

It's an easy mod to fix it if you don't want to hit the restore key, but the page that describes it is currently offline. :-(

[andreas]

Originally posted by Jope
The rubber conductor (similar to those in Mitsumi made Amiga keyboards) has quite a big resistance, so you need to hit the restore key

yeah
ah the memories
Moreover, this characteristic was emulated a bit too accurately in CCS64 emulator
I sometimes feel like having to torture my IBM keyboard here until this damn RUN/STOP-RESTORE combination eventually works

[teh]

WTF is an NMI key?

[andreas]

A key to invoke a non-masked interrupt (NMI).
That's techie stuff though, don't bother.

[derSammler]

A key to invoke a non-masked interrupt (NMI).

"Non Maskable Interrupt"

[andreas]

oops right - that's QUITE a difference in meaning!