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Add words to define interrupt handlers #333

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Add words to define interrupt handlers #333

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12 changes: 11 additions & 1 deletion examples/hello-world/hello.fs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,9 +2,19 @@ title: EXAMPLE

require ibm-font.fs
require term.fs
require interrupt.fs

variable num
: num? 3 8 at-xy num c@ . space ;
: num++ num c@ 1+ num c! ;

p10-interrupt: num++

: main
install-font
init-term
3 7 at-xy
." Hello World !" ;
." Hello World !"
0 num !
enable-key-interrupts
begin num? again ;
53 changes: 53 additions & 0 deletions lib/interrupt.fs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,53 @@
require gbhw.fs

[asm]
:m vblank-interrupt:
' rom here swap
$0040 ==> ( xt ) # call, reti,
( here ) ==> ;

:m lcd-interrupt:
' rom here swap
$0048 ==> ( xt ) # call, reti,
( here ) ==> ;

:m timer-interrupt:
' rom here swap
$0050 ==> ( xt ) # call, reti,
( here ) ==> ;

:m serial-interrupt:
' rom here swap
$0058 ==> ( xt ) # call, reti,
( here ) ==> ;

:m p10-interrupt:
' rom here swap
$0060 ==> ( xt ) # call, reti,
( here ) ==> ;

:m p11-interrupt:
' rom here swap
$0068 ==> ( xt ) # call, reti,
( here ) ==> ;

:m p12-interrupt:
' rom here swap
$0070 ==> ( xt ) # call, reti,
( here ) ==> ;

:m p13-interrupt:
' rom here swap
$0078 ==> ( xt ) # call, reti,
( here ) ==> ;
[endasm]

: ief! ( c -- )
0 rIF c!
rIE c@ or rIE c! ;

: enable-vblank-interrupts IEF_VBLANK ief! ; \ $0040
: enable-lcd-interrupts IEF_LCDC ief! ; \ $0048
: enable-timer-interrupts IEF_TIMER ief! ; \ $0050
: enable-serial-interrupts IEF_SERIAL ief! ; \ $0058
: enable-key-interrupts IEF_HILO ief! ; \ $0060 $0068 $0070 $0078