Video + Audio Output

0x10 (Print string)

Print provided string to terminal.

Argument 1	Argument 2	Implemented
pointer to char buffer	string length	✅

0x11 (Clear the screen)

Effectively clear the text mode screen.

Argument 1	Argument 2	Implemented
0x00	0x00	✅

0x12 (Write graphical pixel)

Write a graphical pixel to the VESA framebuffer.

Argument 1	Argument 2	Implemented
(x << 16) \| y — pixel coordinates	0x00RRGGBB — 24-bit RGB color	✅

0x13 (Write VGA buffer)

Blit a 320×200 palette-indexed buffer into the VESA framebuffer. Each pixel is expanded to 32bpp using the supplied palette, or the default VGA 256-color palette if none is given.

Argument 1	Argument 2	Implemented
pointer to 64000-byte palette-indexed buffer (320×200, 1 byte per pixel)	pointer to 768-byte palette (256 × RGB triplets), or 0 to use the default VGA palette	✅

0x14 (Map VGA graphics RAM)

Maps physical VGA graphics RAM (0xA0000–0xAFFFF) into the calling process at virtual 0xA00_000 with USER+WRITE.

On success writes 0xA00_000 into *arg2. Idempotent.

Argument 1	Argument 2	Implemented
reserved (0x00)	pointer to uint64_t — receives virtual base address	✅

0x15 (Set VGA mode)

Programs VGA hardware registers for the given mode.

Argument 1	Argument 2	Implemented
video mode	reserved (0x00)	✅

0x16 (VESA framebuffer geometry)

Get VESA framebuffer geometry. Writes { width, height, pitch, bpp } into the struct pointed to by arg1. Returns 1 if no framebuffer is available, 0 on success.

Argument 1	Argument 2	Implemented
pointer to FBInfo struct	unused	✅

0x17 (Blit VESA buffer)

Blit a 32bpp (0x00RRGGBB;) buffer to the VESA framebuffer. The kernel handles pitch mismatch. Scaled blit supported via encoded arg2.

Argument 1	Argument 2	Implemented
pointer to 32bpp pixel buffer	0x00 for no scaling, or (src_w << 16) | src_h	✅

0x18 (Copy kernel font)

Copy the kernel's embedded PSF1 glyph data to userland.

Returns char_size (bytes per glyph = font height), or 0 on error. Glyph n occupies bytes [n*char_size .. (n+1)*char_size]; bit 7 (MSB) is the leftmost pixel.

Argument 1	Argument 2	Implemented
pointer to output buffer (*mut u8)	buffer capacity in bytes	✅

0x1a (Play frequency)

Play given frequency in Hz for given time in milliseconds.

Argument 1	Argument 2	Implemented
frequency in Hz	length in milliseconds	✅

0x1b (Play MIDI file)

Play the MIDI audio file from the filesystem.

Argument 1	Argument 2	Implemented
0x01 (MIDI format 0)	pointer to NUL-terminated file name	✅

0x1f (Stop audio player)

Stop the player.

Argument 1	Argument 2	Implemented
0x00	0x00	✅