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Globals and start.asm #19

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ShatteredMINT merged 10 commits from Gelthor/symphony_stdlib:graphics into main 2026-09-06 20:13:07 +02:00
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src/globals.asm
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@@ -1,28 +1,28 @@
; Addresses of global variables
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PleegWat commented 2026-09-06 13:28:49 +02:00
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I'd personally rather see reserved addresses put in hex, but I don't have a good reasoning for that.

I'd personally rather see reserved addresses put in hex, but I don't have a good reasoning for that.
; If not double buffering these point to the same buffer
; If double buffering they must the same size
pub const FB_DISPLAY_PTR = 16 ; U32 Currently displayed buffer
pub const FB_DISPLAY_STRIDE = 20 ; U32 Bytes in each row of the displayed buffer
pub const FB_DRAW_PTR = 24 ; U32 Draw to this buffer
pub const FB_DRAW_STRIDE = 28 ; U32 Bytes in each row of the draw buffer
pub const FB_SIZE_BYTE = 32 ; U32 In bytes
pub const FB_WIDTH_PX = 36 ; U16 Width of screen in pixels
pub const FB_HEIGHT_PX = 38 ; U16 Height of screen in pixels
; Log2 of width in pixels, e.g.
; * 10 => 1024 * 768
; * 8 => 256 * 192
pub const FB_LOG_WIDTH = 40 ; U8
pub const FB_LOG_STRIDE = 41 ; U8 Log2 of FB_xxx_STRIDE in bytes
pub const FB_BYTES_PER_PIXEL = 42 ; U8 Specialisations should hardcode this
; Log2 of bytes per pixel
; * 0 => 8 bits per pixel
; * 2 => 32 bits per pixel
pub const FB_LOG_BPP = 43 ; U8 Specialisations should hardcode this
pub const MAGIC_ADDRESS_LONG = 12 ; U32 Location of the magic value
pub const MAGIC_ADDRESS_LONG = 0x0c ; U32 Location of the magic value
pub const MAGIC_VALUE_LONG = 0xb301534c ; U32 Full 32 bits of the magic value
pub const MAGIC_ADDRESS = 14 ; U16 Location of the low 16 bits of magic value
pub const MAGIC_VALUE = 0x534c ; U16 Low 16 bits of the magic value
pub const MAGIC_ADDRESS = 0x0e ; U16 Location of the low 16 bits of magic value
pub const MAGIC_VALUE = 0x534c ; U16 Low 16 bits of the magic value
; If not double buffering these point to the same buffer
; If double buffering they must the same size
pub const FB_DISPLAY_PTR = 0x10 ; U32 Currently displayed buffer
pub const FB_DISPLAY_STRIDE = 0x14 ; U32 Bytes in each row of the displayed buffer
pub const FB_DRAW_PTR = 0x18 ; U32 Draw to this buffer
pub const FB_DRAW_STRIDE = 0x1c ; U32 Bytes in each row of the draw buffer
pub const FB_SIZE_BYTE = 0x20 ; U32 In bytes
pub const FB_WIDTH_PX = 0x24 ; U16 Width of screen in pixels
pub const FB_HEIGHT_PX = 0x26 ; U16 Height of screen in pixels
; Log2 of width in pixels, e.g.
; * 10 => 1024 * 768
; * 8 => 256 * 192
pub const FB_LOG_WIDTH = 0x28 ; U8
pub const FB_LOG_STRIDE = 0x29 ; U8 Log2 of FB_xxx_STRIDE in bytes
pub const FB_BYTES_PER_PIXEL = 0x2a ; U8 Specialisations should hardcode this
; Log2 of bytes per pixel
; * 0 => 8 bits per pixel
; * 2 => 32 bits per pixel
pub const FB_LOG_BPP = 0x2b ; U8 Specialisations should hardcode this