Is this in z80 ?
From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On
Behalf Of Andrew Park
Sent: 01 January 2014 15:37
To: sam-users@nvg.ntnu.no
Subject: Line interrupts
Hi all
Happy new year lets hope we can see some more sam stuff this year.
Any idea how i
Yes im using jam assembler to write the code
Thanks
Andy
From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On
Behalf Of Adrian Brown
Sent: 01 January 2014 15:59
To: sam-users@nvg.ntnu.no
Subject: RE: Line interrupts
Is this in z80 ?
From:
Set up an IM2 vector table, use the frame interrupt to set up the first line
interrupt (send the line number you want to fire to port $f9), then have your
line interrupt routine set up the second time it should trigger by sending the
new line number again to port $f9.
I do that more or less
On 01/01/2014 15:37, Andrew Park wrote:
Hi all
Happy new year lets hope we can see some more sam stuff this year.
Any idea how i can set up a line interrupt routine between 32768 and
65535? I want to change the palette twice once at line 0 and then
again on line 128.
Many thanks
Andy
I always run with a standard Rom replacement system so use IM mode 1. Stick
a JP at $38 and handle the interrupt that way. It depends if you need to
use the system ROM, but if you don't always consider running your code as a
rom replacement, it also gives you the RST vectors for faster calls for
