; simple static colours
; colours.spudge
proc spudge() {
repeat {
colbk = vcount <<< 1
}
}
or make it move...
; moving colours with a VBI
; coloursMove.spudge
proc spudge() {
; install interrupt to scroll the rainbow
replaceDeferredVBI(rainbowVBI)
repeat {
wsync = 0
colbk = rainbow + (vcount <<< 1)
}
; flip the VBI back to where it was
restoreDeferredVBI()
}
; a simple VBI to scroll the rainbow
byte rainbow
proc rainbowVBI() vbi {
if !(%11 & jiffy) { ; scroll every 4th frame
rainbow += 1
}
exitVerticalBlank ; special VBI exit
}
proc spudge() {
print('hello world?')
}
it's finally here!
the first public release of spudge a new Atari 8 bit programming language
see the previous spudge pre-announcement for the 'rationale' for behind this
here's a zip containing the current (alpha) version along with some documentation and example code
spudge0767-2018-05-30.zip
It has mostly been developed on Windows, but it should run on Linux and Mac OS X too.
how to install
1) unpack the archive as the spudge directory in your home directory
2) copy (from the spudge/bin directory) the spudge.bat (for Windows) or spudge (MacOSX, Linux) file somewhere on your PATH and make executable
(chmod +x on MacOSX, Linux)
perl 5
spudge requires perl 5, install it if required
on Windows 10 I use Strawberry Perl (5.26 http://strawberryperl.com)
on Linux and MacOS X it's probably already there
any recent version (5.18.2 and 5.26 tested) will probably be OK
MADS
spudge uses mads to assemble the assembler code
install somewhere on your PATH
http://mads.atari8.info/
how to run
1) open a command shell in your source directory
2) spudge -h
here is a tests directory in the spudge installation which may be a good place to start
spudge -c hello-world.spudge
It's nearly ready...
hopefully released before the end of May...
