Started making an ASCII font

Bochs: serial to file
Made __uitoa comply with our calling convention
2024-08-24 15:56:51 +03:00 · 2024-08-17 20:25:42 +03:00 · 2024-08-17 20:21:04 +03:00 · 2024-08-17 19:16:53 +03:00 · 2024-08-17 06:21:47 +03:00 · 2024-08-17 00:37:07 +03:00
10 changed files with 273 additions and 213 deletions
--- a/.gitignore
+++ b/.gitignore
@ -4,3 +4,5 @@
 *.bin
 mnt/
 build/
+bx_enh_dbg.ini
+serial.out
--- a/35
+++ b/35
@ -4,22 +4,43 @@ clean:

 start32.bin: src/*
 	fasm src/start32.asm start32.bin
-image: start32.bin mount
+image: start32.bin mount grub-cfg roska.img mnt/roska/
 	cp start32.bin mnt/roska/
 	sync

-qemu-multiboot: start32.bin
-	qemu-system-i386 -kernel start32.bin -serial stdio
-qemu-image: image
+qemu-run: image roska.img
 	qemu-system-i386 roska.img -serial stdio
-
+bochs-run: image roska.img
+	touch serial.out
+	bochs -qf bochsrc.txt
 mount: roska.img mnt/
 	@if ! mountpoint -q "mnt/"; then \
 		sudo mount -o loop,offset=1048576,umask=177,dmask=022,uid=$(shell id -u),gid=$(shell id -g) roska.img mnt/; \
 	fi;
 umount:
-	@sudo umount mnt
+	@if mountpoint -q "mnt/"; then \
+		sudo umount mnt/; \
+	fi;
 mnt/:
-	@mkdir mnt
+	@mkdir -p mnt
+mnt/roska/: mount roska.img
+	@mkdir -p mnt/roska
 build/:
 	@mkdir build
+
+roska.img: mnt/
+	dd if=/dev/zero of=roska.img bs=1k count=16128
+	echo 'type=83' | sudo sfdisk roska.img
+	sudo losetup /dev/loop0 roska.img
+	sudo losetup /dev/loop1 roska.img -o1048576
+	sudo mkdosfs -F32 -f 2 /dev/loop1
+	sudo mount /dev/loop1 mnt/
+	sudo grub-install --target=i386-pc --root-directory=mnt --boot-directory=mnt/boot --no-floppy --modules="normal part_msdos multiboot" /dev/loop0
+	sudo umount mnt/
+	sudo losetup -d /dev/loop1
+	sudo losetup -d /dev/loop0
+grub-cfg: grub.cfg mount
+	cp grub.cfg mnt/boot/grub/grub.cfg
+lo-unsetup: umount
+	sudo losetup -d /dev/loop1
+	sudo losetup -d /dev/loop0
--- a/bochsrc.txt
+++ b/bochsrc.txt
@ -0,0 +1,14 @@
+display_library:	x, options="gui_debug"
+magic_break:	enabled=1
+romimage:	file=$BXSHARE/BIOS-bochs-legacy
+vgaromimage:	file=$BXSHARE/VGABIOS-lgpl-latest
+clock:	sync=realtime
+cpu:	ips=4294967295, reset_on_triple_fault=false
+megs:	128
+ata0:	enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
+ata0-master:	type=disk, mode=flat, path=roska.img, cylinders=32, heads=16, spt=63
+boot:	disk
+
+# Use `bximage` to get disk geometry
+# Serial is piped to serial.out for your `tail`ing sweetness
+com1:	enabled=1, mode=file, dev=serial.out
--- a/grub.cfg
+++ b/grub.cfg
@ -0,0 +1,3 @@
+menuentry "rOSka" {
+   multiboot /roska/start32.bin
+}
--- a/src/font.asm
+++ b/src/font.asm
@ -1,25 +1,43 @@
-;; Thank you Terminus for letting us use this font under SIL licence
-kfont:
-; controlchars
-times 31 db 0x00000000000000000000000000000000
-; space
-db 11000000b
-db 10000000b
-db 00000000b
-db 00000000b
-db 00000000b
-db 00000001b
-db 00000001b
-db 00000001b
-db 00000001b
+;;; Resolution: 8x16
+kfontbasicascii:
+	;; 0	NULL
+	db 11001100b
+	db 11001100b
+	db 00110011b
+	db 00110011b
+	db 11001100b
+	db 11001100b
+	db 00110011b
+	db 00110011b
+	db 11001100b
+	db 11001100b
+	db 00110011b
+	db 00110011b
+	db 11001100b
+	db 11001100b
+	db 00110011b
+	db 00110011b
+	;; 1-31 control characters
+	rb 30*16
+	;; 32	Space
 	db 00000000b
 	db 00000000b
 	db 00000000b
 	db 00000000b
 	db 00000000b
-db 00000001b
-db 00000011b
-; !
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	;; 33	!
+	db 00000000b
 	db 00000000b
 	db 00000000b
 	db 00011000b
@ -29,10 +47,43 @@ db 00011000b
 	db 00011000b
 	db 00011000b
 	db 00011000b
+	db 00011000b
+	db 00000000b
 	db 00000000b
 	db 00011000b
 	db 00011000b
 	db 00000000b
+	;; 34	"
+	db 00000000b
+	db 01100110b
+	db 01100110b
+	db 01100110b
+	db 01100110b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	;; 35	#
+	db 00000000b
+	db 00000000b
+	db 00000000b
+	db 01100110b
+	db 01100110b
+	db 11111111b
+	db 11111111b
+	db 01100110b
+	db 01100110b
+	db 11111111b
+	db 11111111b
+	db 01100110b
+	db 01100110b
 	db 00000000b
 	db 00000000b
 	db 00000000b
--- a/src/framebuffer.asm
+++ b/src/framebuffer.asm
@ -1,11 +1,19 @@
-;; x, y, brightness
+macro kputpixel x*, y*, r*, g*, b* {
+	push b		;b
+	push g		;g
+	push r		;r
+	push y		;y
+	push x		;x
+	call putpixel
+	add esp, 4*5
+}
+
+;; x, y, r, g, b
 putpixel:
 	push ebp
 	mov ebp, esp

-	push eax
 	push ebx
-	push ecx
 	push edi

 	; check pixel is in screen
@ -28,74 +36,37 @@ putpixel:
 	add edi, eax


-	; Brightness
-	mov eax, [ebp + 16]

 	; Poke videomemory
-	cld
-	rep stosb
+	xor eax, eax
+	mov ebx, [ebp+16]
+	mov cl, [mbootinfo.fb_rpos]
+	shl ebx, cl
+	or eax, ebx
+
+	mov ebx, [ebp+20]
+	mov cl, [mbootinfo.fb_gpos]
+	shl ebx, cl
+	or eax, ebx
+
+	mov ebx, [ebp+24]
+	mov cl, [mbootinfo.fb_bpos]
+	shl ebx, cl
+	or eax, ebx
+
+	cmp [mbootinfo.fb_bpp], 32
+	jne .bpp24
+	stosd
+	jmp .done
+.bpp24:
+	stosb
+	shr eax, 8
+	stosb
+	shr eax, 8
+	stosb
 .done:
 	pop edi
-	pop ecx
 	pop ebx
-	pop eax

 	pop ebp
 	ret
-
-; char, x, y
-putchar:
-	push ebp
-	mov ebp, esp
-	push eax
-	push ebx
-	push ecx
-	push edx
-
-	; skip non printable
-	mov eax, [ebp+8] ;char
-	cmp eax, 0x20
-	jl .unprintable
-	cmp eax, 0x7e
-	jg .unprintable
-
-	mov ecx, 16
-	mul ecx
-	mov esi, [kfont+eax]
-
-	mov ebx, [ebp+12] ;x
-	mov edx, [ebp+16] ;y
-
-	cld
-	xor eax, eax
-.loop:
-	lodsb	; load font row to al
-	mov ah, 0
-.loop2:
-	shl al
-	jnc .blankpix
-	; draw a pixel
-	push 0xff
-	push edx ;x
-	push ecx ;y
-.blankpix:
-	inc ah
-	cmp ah, 8
-	je .loop
-
-
-.done:
-	pop edx
-	pop ecx
-	pop ebx
-	pop eax
-	pop ebp
-	ret
-.unprintable:
-	push .unprintablemsg
-	call serialwrite
-	add esp, 4
-	jmp .done
-.unprintablemsg: db 10,"Err: Unprintable char not handled!", 0
-
-include "src/font.asm"
--- a/src/itoa.asm
+++ b/src/itoa.asm
@ -1,8 +1,12 @@
 ;; Modified from: https://gist.github.com/SplittyDev/8e728627012e57ac0deac196660014fb

+; __itoa(src int, target addr, base)
+;target address returned in EAX
+;EBX, EBP, ESP preserved as our calling convention,
+;refer to docs or something
+
 ;
 ; Routine to convert a 32-bit integer to a string.
-; Registers are preserved.
 ;
 ; EAX: Source integer
 ; EBX: Target address
@ -26,19 +30,28 @@
 ; ECX: Target address (active)
 ; EDX: Target address (temporary)
 ;
+; return:
+; put original target at EAX
+; (we trust this blindly)
+
+macro kuitoa src*, dest*, base* {
+	push base
+	push dest
+	push src
+	call __uitoa
+	add esp, 3*4
+}
+
 __uitoa:
 .start:
 	push ebp
 	mov ebp, esp

-	push eax
 	push ebx
-	push ecx
-	push edx

 	mov eax, [ebp+8]
-	mov ecx, [ebp+12]
-	mov ebx, [ebp+16]
+	mov ebx, [ebp+12]
+	mov ecx, [ebp+16]

 	mov edx, ecx
 	mov ecx, ebx
@ -75,11 +88,9 @@ __uitoa:
 	dec ecx
 	jmp .reverse
 .end:
-	pop edx
-	pop ecx
 	pop ebx
-	pop eax

+	mov eax, [ebp+12]	; Return target address
 	pop ebp
 	ret

--- a/src/mbootinfo.asm
+++ b/src/mbootinfo.asm
@ -1,7 +1,6 @@
 mbootgetinfo:
 	push ebp
 	mov ebp, esp
-	push ebx
 	push esi
 	push edi
 	cld
@ -10,23 +9,23 @@ mbootgetinfo:
 	cmp eax, 0x2badb002
 	jne mbootnomagic

-	mov ebx, [ebp+12]
-	mov eax, [ebx]
+	mov edx, [ebp+12]
+	mov eax, [edx]
 	mov [mbootinfo.flags], eax

 	;; Get memoryinformation
 	test eax, 1b
 	jz mbootnomeminfo
-	mov eax, [ebx+4]
+	mov eax, [edx+4]
 	mov [mbootinfo.mem_lower], eax
-	mov eax, [ebx+8]
+	mov eax, [edx+8]
 	mov [mbootinfo.mem_upper], eax

 	;; Get videoinformation
 	test [mbootinfo.flags], (1 shl 02)
 	jz mbootnovideoinfo

-	mov esi, ebx
+	mov esi, edx
 	add esi, 88
 	mov eax, [esi]
 	mov [mbootinfo.fb_addr], eax
@ -54,6 +53,8 @@ mbootgetinfo:
 	mov [mbootinfo.fb_type], al
 	inc esi

+	;garbage?
+	add esi, 2
 	;; r/g/b positions and masks
 	mov ecx, 6
 	mov edi, mbootinfo.fb_rpos
@ -62,13 +63,12 @@ mbootgetinfo:
 .bytesppcalc:
 	xor eax, eax
 	mov al, [mbootinfo.fb_bpp]
-	mov ebx, 8
-	div bl
+	mov edx, 8
+	div dl
 	mov [mbootinfo.fb_bytespp], al
 .done:
 	pop edi
 	pop esi
-	pop ebx
 	pop ebp
 	ret

--- a/src/serial.asm
+++ b/src/serial.asm
@ -1,9 +1,14 @@
 SERIAL_PORT equ 0x3f8
 serialinitialized db 0

-serialinit:
-	push ax
+; Write null terminated string in address str_pointer to serial
+macro serw [str_pointer*] {
+	push str_pointer
+	call serialwrite
+	add esp, 4
+}

+serialinit:
 	;Disable ints
 	mov dx, SERIAL_PORT+1
 	mov al, 0x00
@ -54,7 +59,6 @@ serialinit:
 	out dx, al
 	mov [serialinitialized], 1
 .end:
-	pop ax
 	ret
 .errormsg db "Serial init failed", 0

@ -64,7 +68,6 @@ serialwrite:
 	push ebp
 	mov ebp, esp
 	push esi
-	push ax
 	cld
 	mov esi, [ebp+8]
 .loop:
@ -80,7 +83,6 @@ serialwrite:
 	out dx, al
 	jmp .loop
 .done:
-	pop ax
 	pop esi
 	pop ebp
 	ret
--- a/src/start32.asm
+++ b/src/start32.asm
@ -13,7 +13,7 @@ MB_CHECKSUM          equ -(MB_HEADER_MAGIC + MB_HEADER_FLAGS)

 VWIDTH  equ 640
 VHEIGHT equ 480
-VDEPTH  equ 24
+VDEPTH  equ 32

 multiboot:
 	dd MB_HEADER_MAGIC
@ -29,6 +29,13 @@ multiboot:
 	dd VHEIGHT	; video height
 	dd VDEPTH	; video depth

+; Includes yayyy
+include "src/serial.asm"
+include "src/mbootinfo.asm"
+include "src/itoa.asm"
+include "src/framebuffer.asm"
+include "src/roskalogoraw.asm"
+
 start:
 	; Setup stack
 	mov ebp, stack_top
@ -38,77 +45,60 @@ start:
 	push eax

 	call serialinit
-	push stuff.bootmsg
-	call serialwrite
-	add esp, 4
+
+	serw stuff.bootmsg

 	call mbootgetinfo
 	add esp, 2*4

-	push stuff.fbaddrmsgpfx
-	call serialwrite
-	add esp, 4
-
 	sub esp, 36	;Reserve stack for return
-	push dword esp	;Destination address
-	push dword 16	;Base
-	push dword [mbootinfo.fb_addr]	;source
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
+	mov ebx, esp	;Store str buff addr

-	push stuff.fbdimensionsmsgpfx
-	call serialwrite
-	add esp, 4
-	push dword esp	;destination address
-	push dword 10	;base
-	push dword [mbootinfo.fb_width]
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
-	push stuff.x
-	call serialwrite
-	add esp, 4
+	kuitoa [mbootinfo.fb_addr], ebx, 16
+	serw stuff.fbaddrmsgpfx, ebx

-	push dword esp	;destination address
-	push dword 10	;base
-	push dword [mbootinfo.fb_height]
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
-	push stuff.x
-	call serialwrite
-	add esp, 4
+	kuitoa [mbootinfo.fb_width], ebx, 10
+	serw stuff.fbdimensionsmsgpfx, ebx, stuff.x

-	push dword esp	;destination address
-	push dword 10	;base
-	xor eax, eax
-	mov al, [mbootinfo.fb_bpp]
-	push dword eax
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
+	kuitoa [mbootinfo.fb_height], ebx, 10
+	serw ebx, stuff.x
+
+	movzx eax, byte [mbootinfo.fb_bpp]
+	kuitoa eax, ebx, 10
+	serw ebx
+
+
+	movzx eax, byte [mbootinfo.fb_rpos]
+	kuitoa eax, ebx, 10
+	serw stuff.rpostxt, ebx
+
+	movzx eax, byte [mbootinfo.fb_gpos]
+	kuitoa eax, ebx, 10
+	serw stuff.gpostxt, ebx
+
+	movzx eax, byte [mbootinfo.fb_bpos]
+	kuitoa eax, ebx, 10
+	serw stuff.bpostxt, ebx
+
+
+	movzx eax, byte [mbootinfo.fb_rmasksize]
+	kuitoa eax, ebx, 10
+	serw stuff.rmasksizetxt, ebx
+
+	movzx eax, byte [mbootinfo.fb_gmasksize]
+	kuitoa eax, ebx, 10
+	serw stuff.gmasksizetxt, ebx
+
+	movzx eax, byte [mbootinfo.fb_bmasksize]
+	kuitoa eax, ebx, 10
+	serw stuff.bmasksizetxt, ebx

 	add esp, 36	;Clean reserved uitoa return string from stack

-	; Draw a test pixel to bottom right corner
-	mov eax, 0xff
-	mov ebx, 767
-	mov ecx, 1023
-	push 0xff
-	push 479
-	push 639
-	call putpixel
-	add esp, 3*4
+	; Draw a green test pixel to bottom-right
+	kputpixel VWIDTH-1, VHEIGHT-1, 0x00, 0xff, 0x00

+; Draw a predefined logo in magenta to top-left
 rOSkalogodraw:
 	mov esi, roskalogo
 	mov eax, 0	;Brightness
@ -116,13 +106,12 @@ rOSkalogodraw:
 	mov ecx, 0	;x
 .loop:
 	lodsb
-	push eax
-	push ebx
+
 	push ecx
-	call putpixel
-	pop ecx
-	pop ebx
+	push eax
+	kputpixel ecx, ebx, eax, 0x00, eax
 	pop eax
+	pop ecx

 	inc ecx
 	cmp byte cl, [roskalogo.w]
@ -132,36 +121,32 @@ rOSkalogodraw:
 	cmp byte bl, [roskalogo.h]
 	jne .loop
 .done:
-
-push byte 0x21
-push byte 0x21
-push byte 0x21
-call putchar
-add esp, 3*4
-
 jmp hang

+
+
 hang:
-	push .msg
-	call serialwrite
+	serw .msg
 	cli
 .loop:
 	hlt
 	jmp .loop
 .msg db 10, "Halting...", 10, 0

-include "src/serial.asm"
-include "src/mbootinfo.asm"
-include "src/itoa.asm"
-include "src/framebuffer.asm"
-include "src/roskalogoraw.asm"
-
 stuff:
 	.bootmsg db 10, "=== rOSka ===", 10, 0
 	.fbaddrmsgpfx db 10, "Framebuffer address: 0x", 0
 	.fbdimensionsmsgpfx db 10, "Framebuffer dimensions: ", 0
 	.x db "x", 0

+
+	.rpostxt db 10, "rPos: ", 0
+	.gpostxt db 10, "gPos: ", 0
+	.bpostxt db 10, "bPos: ", 0
+	.rmasksizetxt db 10, "rMaskSize: ", 0
+	.gmasksizetxt db 10, "gMaskSize: ", 0
+	.bmasksizetxt db 10, "bMaskSize: ", 0
+
 align 4096
 bss_start:
 ;align 4096
Author	SHA1	Message	Date
Jarkko Toivanen	57dd60bcef	Started making an ASCII font	2024-08-24 15:56:51 +03:00
Jarkko Toivanen	091f7cb4b8	Bochs: serial to file	2024-08-17 20:25:42 +03:00
Jarkko Toivanen	f9e2dc33e9	Made __uitoa comply with our calling convention Changed __uitoa order of arguments from src,base,target to src,target,base Also returns target in EAX	2024-08-17 20:21:04 +03:00
Jarkko Toivanen	0d9fcf5ae4	BOCHS debugging stuff	2024-08-17 19:16:53 +03:00
Jarkko Toivanen	c2e69b6f7f	More and advanceder macros	2024-08-17 06:21:47 +03:00
Jarkko Toivanen	7a22e4aed7	Follow C calling convention (futureproofing) and utilize macros	2024-08-17 00:37:07 +03:00
Jarkko Toivanen	32ccb3abd1	Automating image-file creation	2024-08-16 18:22:30 +03:00
Jarkko Toivanen	bcf49f4fef	Framebuffer supports colour now	2024-01-26 18:38:18 +02:00
Jarkko Toivanen	bbd80c4f78	Cleaning up	2024-01-26 18:23:51 +02:00
Jarkko Toivanen	3dd934bd83	Fixed R/G/B field information fetching from Multiboot	2024-01-13 03:28:43 +02:00
Jarkko Toivanen	a0ba839215	Get sweet R/G/B positions as numbers for debugging	2024-01-13 02:36:35 +02:00
Jarkko Toivanen	e4172c14bb	Fancy colour loop	2023-09-21 21:06:37 +03:00