152 lines
2.9 KiB
NASM
152 lines
2.9 KiB
NASM
; Constants
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const SYS_STACK_START: 0x03fffff0
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const BG_FRAMEBUFFER: 0x2000000
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const SCREEN_WIDTH: 640
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const SCREEN_HEIGHT: 480
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const COLOR_WHITE: 0xffffffc0
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const COLOR_BLUE: 0xffffff40
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const COLOR_ORANGE: 0xff4080ff
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; Globals
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const FRAMENR: 0x00000000
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const SHOWING_LOGO: 0x00000004
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org 0xf0000000
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entry:
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mcl ; disable MMU
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mov rsp, SYS_STACK_START ; set stack pointer
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mov r0, version_str_1
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call serial_print
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mov r0, version_str
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call serial_print
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mov r0, version_str_2
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call serial_print
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mov r0, sha_str
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call serial_print
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mov r0, version_str_3
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call serial_print
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call show_logo
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mov r0, BG_FRAMEBUFFER
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mov r1, 640 ; width
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mov r2, entry_str
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mov r3, 20 ; x
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mov r4, 20 ; y
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mov r5, 20 ; l
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mov r6, 620 ; r
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mov r7, 100000 ; bot
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mov r30, 16
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mov r31, COLOR_WHITE
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call draw_str_at
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mov r2, version_str_1
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call draw_str_at
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mov r2, version_str
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mov r31, COLOR_BLUE
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call draw_str_at
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mov r2, version_str_2
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mov r31, COLOR_WHITE
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call draw_str_at
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mov r2, sha_str
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mov r31, COLOR_ORANGE
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call draw_str_at
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mov r31, COLOR_WHITE
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mov r2, version_str_3
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call draw_str_at
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mov r31, COLOR_WHITE
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mov r2, credit_str_1
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call draw_str_at
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mov r31, COLOR_BLUE
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mov r2, credit_str_2
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call draw_str_at
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mov r31, COLOR_WHITE
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mov r2, credit_str_3
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call draw_str_at
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mov r31, COLOR_ORANGE
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mov r2, credit_str_4
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call draw_str_at
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mov r31, COLOR_WHITE
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mov r2, booting_str
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call draw_str_at
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mov r0, booting_str
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call serial_print
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halt
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entry_str: data.str "= " data.8 128 data.str "EN32OS =" data.8 10 data.8 10 data.8 0
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; defines version_str, sha_str
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#include "data/version.inc"
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version_str_1: data.str "version " data.8 0
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version_str_2: data.str " (commit " data.8 0
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version_str_3: data.str ")" data.8 10 data.8 0
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credit_str_1: data.str "font by " data.8 0
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credit_str_2: data.str "ultlang " data.8 129 data.8 0
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credit_str_3: data.str ", os by " data.8 0
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credit_str_4: data.str "xenia" data.8 10 data.8 10 data.8 0
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booting_str: data.str "booting..." data.8 10 data.8 0
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; input:
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; str: &str0 @ r0
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; returns:
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; nothing
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; clobbers:
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; r0
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serial_print:
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cmp.8 [r0], 0
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ifz ret
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out 0x00000000, [r0]
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inc r0
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jmp serial_print
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; input:
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; n: u64 @ r0
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; returns
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; nothing
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; clobbers:
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; r0
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serial_print_num:
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cmp r0, 0
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ifz jmp serial_print_num_zero
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call serial_print_num_nonzero
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ret
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serial_print_num_nonzero:
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cmp r0, 0
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ifz ret
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push r0
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div r0, 10
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call serial_print_num_nonzero
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pop r0
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rem r0, 10
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add r0, 48
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out 0x00000000, r0
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ret
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serial_print_num_zero:
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mov r0, serial_print_num_str_zero
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jmp serial_print ; tail call
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serial_print_num_str_zero: data.str "0" data.8 0
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serial_print_nl:
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out 0x00000000, 10
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ret
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#include "logo.asm"
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#include "text.asm"
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