Initial commit

6 files changed, 331 insertions, 0 deletions

diff --git a/apm.asm b/apm.asm
new file mode 100644
index 0000000..1f06116
--- /dev/null
+++ b/apm.asm
@@ -0,0 +1,49 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Connect APM interface
+apm_ConnectInterface:
+	push	ax							; Push some registers
+	push	bx							; 
+	mov		si, apm_msgConnectingInterface	; Display a message saying that we're connecting the interface
+	call	OutText						; 
+	mov		ax, 0x5301					; 0x5301 - connect interface subfunction
+	xor		bx, bx						; zero-out bx
+	int		0x15						; Int 15.5301 - connect APM interface
+	jc		.error						; Jump to .error if interrupt set cf on error
+.quit:
+	pop		bx							; Pop our registers back off the stack
+	pop		ax							; 
+	ret
+.error:
+	mov		si, msgFailedWithCode		; Display a message explaining that it failed
+	call	OutText						; 
+	xor		dx, dx						; clear DX
+	mov		dl, ah						; load DL with number to convert
+	call	NumberToString				; Convert DL to string in NumberBuffer
+	mov		si, NumberBuffer			; Load address on NumberBuffer for printing
+	call	OutText						; Print NumberBuffer
+	jmp		.quit						; Jump to .quit for some POPping and then return
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Power-off the computer using APM interface
+apm_PowerOff:
+	mov		ax, 0x5307					; 5307 - Set power state
+	mov		bx, 0x0001					; 0001 - Device: BIOS
+	mov		cx, 0x0003					; 0003 - power state: off
+	int		0x15						; Int 15.5307 - set power state using APM interface
+	jc		.error
+	ret
+.error:
+	mov		si, msgFailedWithCode		; Print a message to tell the user a failiure happened
+	call	OutText						; 
+	xor		dx, dx						; Zero-out DX
+	mov		dl, ah						; Load DL with number to convert
+	call	NumberToString				; Convert DL to string in NumberBuffer
+	mov		si, NumberBuffer			; Load NumberBuffer address for printing
+	call	OutText						; Print NumberBuffer
+	mov		si, msgNewLine				; 
+	call	OutText						; 
+	mov		si, apm_msgPowerOffFailed	; 
+	call	OutText						; 
+	ret
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\ No newline at end of file
diff --git a/diskio.asm b/diskio.asm
new file mode 100644
index 0000000..fa1524c
--- /dev/null
+++ b/diskio.asm
@@ -0,0 +1,21 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Reset the disk system
+;; DL must be disk to reset
+diskio_ResetDiskSystem:
+	pop		ax
+	pop		dx
+	push	ax
+	xor		ah, ah
+	int		0x13
+	ret
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+diskio_DumpBootSector:
+	xor		bx, bx
+	mov		es, bx
+	mov		bx, diskio_SectorBuffer	; ES:BX = address
+	mov		dl, [Drive]			; DL = Drive number
+	mov		ah, 2				; AH = Read command
+	int		0x13					; Read sector
+	push	diskio_SectorBuffer
+	call	OutText
+	ret
diff --git a/jasposkernel.asm b/jasposkernel.asm
new file mode 100644
index 0000000..ccc7dbc
--- /dev/null
+++ b/jasposkernel.asm
@@ -0,0 +1,73 @@
+Entry:
+	mov		ax, cs
+	mov		ds, ax
+	mov		es, ax
+	mov		ss, ax
+	;mov		esp, 0x7FFFF
+	mov		sp, 0xFFFE
+	call	ClearScreen					; Clear the screen
+	mov		[Drive], dl					; Get the drive we booted from before we go and mess with dl
+	
+	push	msgJasposSplash				; 
+	call	OutText						; 
+	
+	call	GetKey						; 
+	call	diskio_ResetDiskSystem
+	call	diskio_ResetDiskSystem
+	call	diskio_ResetDiskSystem
+	call	diskio_DumpBootSector
+	call	GetKey
+	call	apm_ConnectInterface		; 
+	call	apm_PowerOff				; 
+	jmp		short Halt
+
+GetKey:
+	xor		ax, ax						; Zero-out EAX
+	int		0x16						; Int 16.00 - wait for keypress
+	ret									; Return
+
+Halt:
+	xor		ax, ax						; Zero-out AX
+	int		0x16						; Int 16.00 - wait for keypress
+	jmp		Halt						; Loop
+
+ClearNumberBuffer:
+	push	cx							; Push the registers we'll be messing with
+	push	ax							; 
+	push	di							; 
+	mov		al, '0'						; AL = "0" - char to fill buffer with
+	mov		cx, 5						; write 0 six times
+	mov		di, NumberBuffer			; Destination is NumberBuffer
+	rep		stosb						; Store the byte AL CX times
+	pop		di							; Pop our regisers back off the stack
+	pop		ax							; 
+	pop		cx							; 
+	ret
+
+ShowFiles:
+	pop		ax
+	pop		si
+	push	ax
+	cld
+	mov		di, diskio_SectorBuffer
+	mov		cx, 16
+	rep		movsb
+	
+	push	msgFile
+	call	OutText
+	push	diskio_SectorBuffer
+	call	OutText
+	
+	mov		di, diskio_SectorBuffer
+	mov		cx, 16
+	rep		movsb
+	push	msgAuthor
+	call	OutText
+	push	diskio_SectorBuffer
+	call	OutText
+	ret
+
+%include "Kernel/textvga.asm"
+%include "Kernel/apm.asm"
+%include "Kernel/strings.asm"
+%include "Kernel/diskio.asm"
\ No newline at end of file
diff --git a/shell.asm b/shell.asm
new file mode 100644
index 0000000..b73db67
--- /dev/null
+++ b/shell.asm
@@ -0,0 +1,8 @@
+Main:
+	call	GetKey
+	mov		ah, 0x0E
+	
+GetKey:
+	xor		ax, ax
+	int		0x16
+	ret
diff --git a/strings.asm b/strings.asm
new file mode 100644
index 0000000..b92cf6e
--- /dev/null
+++ b/strings.asm
@@ -0,0 +1,43 @@
+msgMmmBooting				db		"Mmm.. booting!",13,10,0
+msgFailedWithCode			db		1,0x0C,"Failed",1,0x07," with error code: ",0
+msgWaitingKeypress			db		"Waiting for a keypress...",13,10,0
+msgNewLine					db		13,10,0
+msgJasposSplash				db		13,13,13,10,
+							db		"                    ",1,0x07,"ллллллллллллллллллллллллллллллллллллллл",13,10,
+							db		"               ВВВВВлллллллллллллллллллллллллллллллллллллллВВВВВ",13,10,
+							db		"          БББББВВВВВлллллллллллллллллллллллллллллллллллллллВВВВВБББББ",13,10,
+							db		"     АААААБББББВВВВВлллллллллллллллллллллллллллллллллллллллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлл",1,0x20,"     ",1,0x07,"лл",1,0x20,"   ",1,0x07,"ллл",1,0x20,"   ",1,0x07,"лл",1,0x20,"    ",1,0x07,"ллл",1,0x20,"   ",1,0x07,"ллл",1,0x20,"   ",1,0x07,"лллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"л",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"л",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"л",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"л",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"ллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"лл",1,0x20,"  ",1,0x07,"ллл",1,0x20,"    ",1,0x07,"лл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"лл",1,0x20,"  ",1,0x07,"ллллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлллл",1,0x20," ",1,0x07,"ллл",1,0x20,"     ",1,0x07,"лллл",1,0x20," ",1,0x07,"лл",1,0x20," ",1,0x07,"ллллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"лллл",1,0x20," ",1,0x07,"лллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"л",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"л",1,0x20," ",1,0x07,"ллллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"л",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"ллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлл",1,0x20,"   ",1,0x07,"ллл",1,0x20," ",1,0x07,"ллл",1,0x20," ",1,0x07,"лл",1,0x20,"   ",1,0x07,"лл",1,0x20," ",1,0x07,"лллллл",1,0x20,"   ",1,0x07,"ллл",1,0x20,"   ",1,0x07,"лллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлллллллллллллллллллллллллллллллллллллллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВллл",1,0x70," Kernel Version  : 1.0           ",1,0x07,"лллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВллл",1,0x70," Compilation Date: 2012-06-24    ",1,0x07,"лллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВллл",1,0x70," Author          : David Phillips",1,0x07,"лллВВВВВБББББААААА",13,10,
+							db		"     АААААБББББВВВВВлллллллллллллллллллллллллллллллллллллллВВВВВБББББААААА",13,10,
+							db		"          БББББВВВВВлллллллллллллллллллллллллллллллллллллллВВВВВБББББ",13,10,
+							db		"               ВВВВВлллллллллллллллллллллллллллллллллллллллВВВВВ",13,10,
+							db		"                    ллллллллллллллллллллллллллллллллллллллл",13,10,0
+
+;0000084D  07                pop es
+CharColour					db		7d
+;0000084E  3030              xor [bx+si], dh
+NumberBuffer				db		"00000",0
+HexNumberBuffer				db		"00",0
+;00000850  3030              xor [bx+si], dh
+;00000852  3000              xor [bx+si], al
+;00000854  0000              add [bx+si], al
+VGAMemPointer				dw		0
+apm_msgConnectingInterface	db		"Connecting APM interface...",13,10,0
+apm_msgPoweringOff			db		"Powering-off...",13,10,0
+apm_msgPowerOffFailed		db		"I requested that the system turns off but it hasn't done so.",13,10,
+							db		"You may instead turn the power to your system off now. It's safe.",0
+msgPowerOff					db		"I'll turn the computer off now.",13,10
+Drive						db		0xFF
+diskimage					db		"KERNEL          ","JASPOS DEVELOPER",0,"                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               "
+msgFile						db		"File: ",0
+msgAuthor					db		"Author: ",0
+diskio_SectorBuffer			times (512) db 0
\ No newline at end of file
diff --git a/textvga.asm b/textvga.asm
new file mode 100644
index 0000000..19f42e5
--- /dev/null
+++ b/textvga.asm
@@ -0,0 +1,137 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Print text onto the text screen
+OutText:
+	pop		ax
+	pop		si
+	push	ax
+	mov		ax, 0xB800					; Load AX with the VGA segment
+	mov		es, ax						; and then ES
+	mov		di, [VGAMemPointer]			; Load DI with VGA memory pointer
+
+.loop:
+	lodsb								; Load a byte from the string into AL
+	or		al, al						; Do a byte comarison on the char
+	jz		.Quit						; Exit the function if it's a null
+	cmp		al, 1						; Check to see if it's a colour control char
+	jz		.SetColour					; If so, jump to handle it
+	cmp		al, 13d						; Is the byte a CR?
+	jz		.cr							; if so, jump
+	cmp		al, 10d						; Is the byte a LF?
+	jz		.lf							; Jump if it is
+	stosb								; Store the byte in memory. This happens if it's not a control char
+	mov		al, [CharColour]			; Load the current char colour
+	stosb								; Store the char colour in the byte after the character
+	jmp		short .loop					; Loop
+
+.cr:
+	add		di, 160d					; Add 160 to the byte pointer, thus moving the pointer down one line
+	jmp		short .loop					; Jump back to top of the loop
+
+.lf:
+	mov		ax, di						; Move our current position/pointer into AX
+	mov		di, 160d					; Load DI with 160 (# of bytes per line)
+	div		di							; AX = AX / DI  and  DX = remainder
+	mul		di							; AX = AX * DI
+	mov		di, ax						; So now AX has been divided and had the remainder chopped off in doing so
+	jmp		short .loop					; and is now multiplied back, so the pointer is now at the start of current line
+
+.SetColour:
+	lodsb								; Load the byte
+	mov [CharColour], al				; Set the CharColour to that byte
+	jmp short .loop						; Go back to top of loop
+
+.Quit:
+	mov [VGAMemPointer], di				; Move the updated cursor position into VGAMemPointer
+	ret									; Return to where this function was called
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Clear the text screen
+ClearScreen:
+	push	ax							; push our registers used
+	push	cx
+	push	di
+	push	es
+	mov		ax, 0xB800					; Load AX with the VGA segment
+	mov		es, ax						; And then load ES with AX
+	xor		di, di						; Set our reading pointer to the base of the segment
+	mov		cx, 0x7D0					; We'll be looping 2000 times
+.loop:
+	mov		al, 0x20					; Load AL with character to clear address with
+	stosb								; Store our byte
+	mov		al, [CharColour]			; 
+	stosb								; 
+	loop	.loop						; Loop
+	xor		ax, ax						; Zero-out AX
+	mov		[VGAMemPointer], ax			; Load nulled-out AX into pointer
+	pop		es
+	pop		di
+	pop		cx
+	pop		ax							; pop registers we used back off stack
+	ret
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Set the cursor position
+SetCursorPosition:
+	push	ax							; Push our registers
+	push	bx							; 
+	mov		ah, 2						; Subfunction 2 - set cursor pos.
+	xor		bh, bh						; clear BH
+	int		0x10						; Int 10.02 - set cursor position
+	pop		bx							; Pop registers back off stack
+	pop		ax							; 
+	ret
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Convert decimal in dx to string in NumberBuffer
+NumberToString:
+	std
+	pop		dx
+	mov 	cx, 0x5
+	lea 	di, [NumberBuffer + 4]
+.loop:
+	mov 	ax, dx
+	mov 	dx, 10d
+	div 	dl
+	mov 	dl, al
+	mov 	al, ah
+	add 	al, 0x30
+	stosb
+	loop	.loop
+	cld
+	ret
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Convert he value in al to string in HexNumberBuffer
+HexToString:
+	mov		di, HexNumberBuffer
+	xor		ah, ah					; zero-out ah so shifiting doesn't cause bits of ah to come into al
+	push	ax						; save AL
+	shr		al, 4					; Shift AL along 4 bits
+	add		al, 48d					; add 48 onto it
+	cmp		al, 57d					; see if it's > 9
+	jg		.letter
+.return:
+	stosb
+	pop		ax
+	shl		al, 4
+	shr		al, 4
+	add		al, 48d
+	cmp		al, 57d
+	jg		.letter_last_digit
+	stosb
+.quit:
+	ret
+
+.letter:
+	add		ax, 7d
+	jmp		.return
+
+.letter_last_digit:
+	add		ax, 7d
+	stosb
+	jmp		.quit
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\ No newline at end of file