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52 lines
1.4 KiB
Lua
52 lines
1.4 KiB
Lua
%import palette
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%import textio
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%import syslib
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%zeropage basicsafe
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; Example that shows a way to handle multiple IRQ sources on the X16.
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; This uses the "NEW" way using the X16 specific interrupt handler routines in cx16.
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; Currently only Vera interrupts are supported. VIA irqs are an exercise for the reader.
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main {
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sub start() {
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cx16.enable_irq_handlers(true)
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cx16.set_line_irq_handler(150, &irq.line_irq)
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cx16.set_vsync_irq_handler(&irq.vsync_irq)
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txt.print("\n\n\nx16 irq handlers installed (new style)\n")
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txt.print("red = vsync irq\n")
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txt.print("green = first line irq\n")
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txt.print("blue = second line irq\n")
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}
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}
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irq {
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sub vsync_irq() -> bool {
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cx16.save_vera_context()
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palette.set_color(0, $f00)
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repeat 1000 {
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cx16.r0++
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}
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palette.set_color(0, $000)
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cx16.restore_vera_context()
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return true
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}
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sub line_irq() -> bool {
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cx16.save_vera_context()
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if cx16.VERA_SCANLINE_L==150 {
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palette.set_color(0, $0f0)
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sys.set_rasterline(200) ; prepare next line irq
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} else {
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palette.set_color(0, $00f)
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sys.set_rasterline(150) ; back to first line irq
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}
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repeat 500 {
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cx16.r0++
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}
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palette.set_color(0, $000)
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cx16.restore_vera_context()
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return false
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}
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}
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