77ec9b6369
Do it all at once in preparation for Go 1.18 support. To make this commit, I've simply modified the `fmt-check` Makefile target to rewrite files instead of listing the differences. So this is a fully mechanical change, it should not have introduced any errors.
67 строки
1,8 КиБ
Go
67 строки
1,8 КиБ
Go
//go:build gameboyadvance
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// +build gameboyadvance
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package machine
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import (
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"image/color"
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"runtime/interrupt"
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"runtime/volatile"
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"unsafe"
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)
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// Not sure what name to pick here. Not using ARM7TDMI because that's the CPU
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// name, not the device name.
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const deviceName = "GBA"
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// Interrupt numbers as used on the GameBoy Advance. Register them with
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// runtime/interrupt.New.
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const (
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IRQ_VBLANK = interrupt.IRQ_VBLANK
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IRQ_HBLANK = interrupt.IRQ_HBLANK
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IRQ_VCOUNT = interrupt.IRQ_VCOUNT
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IRQ_TIMER0 = interrupt.IRQ_TIMER0
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IRQ_TIMER1 = interrupt.IRQ_TIMER1
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IRQ_TIMER2 = interrupt.IRQ_TIMER2
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IRQ_TIMER3 = interrupt.IRQ_TIMER3
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IRQ_COM = interrupt.IRQ_COM
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IRQ_DMA0 = interrupt.IRQ_DMA0
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IRQ_DMA1 = interrupt.IRQ_DMA1
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IRQ_DMA2 = interrupt.IRQ_DMA2
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IRQ_DMA3 = interrupt.IRQ_DMA3
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IRQ_KEYPAD = interrupt.IRQ_KEYPAD
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IRQ_GAMEPAK = interrupt.IRQ_GAMEPAK
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)
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// Make it easier to directly write to I/O RAM.
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var ioram = (*[0x400]volatile.Register8)(unsafe.Pointer(uintptr(0x04000000)))
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// Set has not been implemented.
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func (p Pin) Set(value bool) {
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// do nothing
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}
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var Display = FramebufDisplay{(*[160][240]volatile.Register16)(unsafe.Pointer(uintptr(0x06000000)))}
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type FramebufDisplay struct {
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port *[160][240]volatile.Register16
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}
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func (d FramebufDisplay) Configure() {
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// Write into the I/O registers, setting video display parameters.
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ioram[0].Set(0x03) // Use video mode 3 (in BG2, a 16bpp bitmap in VRAM)
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ioram[1].Set(0x04) // Enable BG2 (BG0 = 1, BG1 = 2, BG2 = 4, ...)
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}
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func (d FramebufDisplay) Size() (x, y int16) {
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return 240, 160
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}
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func (d FramebufDisplay) SetPixel(x, y int16, c color.RGBA) {
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d.port[y][x].Set((uint16(c.R) >> 3) | ((uint16(c.G) >> 3) << 5) | ((uint16(c.B) >> 3) << 10))
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}
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func (d FramebufDisplay) Display() error {
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// Nothing to do here.
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return nil
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}
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