Changes between Version 1 and Version 2 of WikiStart

Timestamp:

Mar 4, 2009, 6:32:41 PM (15 years ago)

Author:

Mattia Monga

Comment:

--

WikiStart

@@ -1 @@
-= Welcome to Trac 0.11.1 =
+= Laboratorio di Sistemi Operativi =
 
-Trac is a '''minimalistic''' approach to '''web-based''' management of
-'''software projects'''. Its goal is to simplify effective tracking and handling of software issues, enhancements and overall progress.
+== 4 marzo 2009 ==
 
-All aspects of Trac have been designed with the single goal to 
-'''help developers write great software''' while '''staying out of the way'''
-and imposing as little as possible on a team's established process and
-culture.
+ * [http://homes.dico.unimi.it/sisop/lucidi0809/solab01.pdf slide]([http://homes.dico.unimi.it/sisop/lucidi0809/solab01.pdf Versione stampa])
 
-As all Wiki pages, this page is editable, this means that you can
-modify the contents of this page simply by using your
-web-browser. Simply click on the "Edit this page" link at the bottom
-of the page. WikiFormatting will give you a detailed description of
-available Wiki formatting commands.
+=== Programmi ===
 
-"[wiki:TracAdmin trac-admin] ''yourenvdir'' initenv" created
-a new Trac environment, containing a default set of wiki pages and some sample
-data. This newly created environment also contains 
-[wiki:TracGuide documentation] to help you get started with your project.
+* Accesso diretto alla macchina fisica `mioboot-nobios-simple.asm`
 
-You can use [wiki:TracAdmin trac-admin] to configure
-[http://trac.edgewall.org/ Trac] to better fit your project, especially in
-regard to ''components'', ''versions'' and ''milestones''. 
+{{{
+bits 16                         ; 16 bit real mode
+org 0x7C00                      ; origine indirizzo 0000:7C00
+
+start:  
+ mov ax, 0xb800  ; text video memory
+ mov ds, ax
+ mov eax, 10
+write:
+ cmp eax, 0
+ jz end
+ mov byte [eax], 'm'
+ mov byte [eax+1], 0x0F    ; attrib = white on black
+ sub eax, 2
+ jmp write
+end:
+ hlt
+
+times 510-($-$$) db 0 ; 0-padding 
+dw 0xAA55
+}}}
+
+{{{
+#!sh
+nasm -l mioboot-nobios-simple.lst -o mioboot-nobios-simple.img mioboot-nobios-simple.asm
+qemu mioboot-nobios-simple.img
+}}}
 
 
-TracGuide is a good place to start.
+* Uso dei servizi del BIOS `mioboot.asm`
 
-Enjoy! [[BR]]
-''The Trac Team''
+{{{
+bits 16                         ; 16 bit real mode
+org 0x7C00                      ; origine indirizzo 0000:7C00
+        
+start:
+        cld                     ; clears direction flag (index regs incremented)
+        mov si, boot
+        call message
+working:
+        mov si, work
+        call message
 
-== Starting Points ==
+        call waitenter
+        jmp working
 
- * TracGuide --  Built-in Documentation
- * [http://trac.edgewall.org/ The Trac project] -- Trac Open Source Project
- * [http://trac.edgewall.org/wiki/TracFaq Trac FAQ] -- Frequently Asked Questions
- * TracSupport --  Trac Support
+message:
+        lodsb                   ; carica un byte da [DS:SI] in AL e inc SI
+        cmp al, 0
+        jz done
+        mov ah, 0x0E            ; write char to screen in text mode
+        mov bx, 0               ; BH page number BL foreground color
+        int 0x10                ; write AL to screen (BIOS)
+        jmp message
+done:   ret
 
-For a complete list of local wiki pages, see TitleIndex.
+boot: db "Loading unuseful system...." , 10, 13, 0
+work: db "I've done my unuseful stuff!" , 10, 13, 0 
+cont: db "Hit ENTER to continue...", 10, 13, 0
+wow: db "Great! Hello world!" , 10, 13, 0
+        
+waitenter: mov si, cont
+           call message
+           mov ah, 0
+           int 0x16                ; Wait for keypress (BIOS)
+           cmp al, 'm'
+           jz egg
+           cmp al, 'b'
+           jz basic
+           cmp al, 13
+           jnz waitenter
+           ret
+egg:       mov si, wow
+           call message
+           jmp waitenter
+basic:     int 0x18             ; basic (BIOS)
+           hlt
+
+        times 510-($-$$) db 0
+        dw 0xAA55
+}}}
+
+{{{
+#!sh
+nasm -l mioboot.lst -o mioboot.img mioboot.asm
+qemu mioboot.img
+}}}
+
+
+=== Link ===
+
+ * [http://nasm.sourceforge.org NASM ]
+ * [http://www.drpaulcarter.com/pcasm/ PC Assembly Language, by Paul A. Carter]
+ * [http://fabrice.bellard.free.fr/qemu QEmu]
+ * [http://www.intel.com/products/processor/manuals/ Manuali Intel]
+