From 188807622ac0e6937260d710da1d62010a28fd14 Mon Sep 17 00:00:00 2001
From: "Hazal2.Veziroglu@live.uwe.ac.uk" <hazal2.veziroglu@live.uwe.ac.uk>
Date: Thu, 5 Dec 2024 12:00:45 +0000
Subject: [PATCH] Update 24 files
- /Worksheet2_2/Makefile
- /Worksheet2_2/frame_buffer.c
- /Worksheet2_2/frame_buffer.h
- /Worksheet2_2/hardware_interrupt_enabler.s
- /Worksheet2_2/interrupt_asm.o
- /Worksheet2_2/interrupt_asm.s
- /Worksheet2_2/interrupt_handlers.o
- /Worksheet2_2/interrupt_handlers.s
- /Worksheet2_2/interrupts.c
- /Worksheet2_2/interrupts.h
- /Worksheet2_2/interrupts.o
- /Worksheet2_2/io.h
- /Worksheet2_2/io.o
- /Worksheet2_2/io.s
- /Worksheet2_2/keyboard.c
- /Worksheet2_2/keyboard.h
- /Worksheet2_2/keyboard.o
- /Worksheet2_2/kmain.c
- /Worksheet2_2/kmain.o
- /Worksheet2_2/loader.s
- /Worksheet2_2/pic.c
- /Worksheet2_2/pic.h
- /Worksheet2_2/pic.o
- /Worksheet2_2/types.h
---
Worksheet2_2/Makefile | 24 -----
Worksheet2_2/frame_buffer.c | 12 ---
Worksheet2_2/frame_buffer.h | 11 ---
Worksheet2_2/hardware_interrupt_enabler.s | 0
Worksheet2_2/interrupt_asm.o | Bin 432 -> 0 bytes
Worksheet2_2/interrupt_asm.s | 6 --
Worksheet2_2/interrupt_handlers.o | Bin 576 -> 0 bytes
Worksheet2_2/interrupt_handlers.s | 17 ----
Worksheet2_2/interrupts.c | 115 ----------------------
Worksheet2_2/interrupts.h | 40 --------
Worksheet2_2/interrupts.o | Bin 2448 -> 0 bytes
Worksheet2_2/io.h | 7 --
Worksheet2_2/io.o | Bin 416 -> 0 bytes
Worksheet2_2/io.s | 9 --
Worksheet2_2/keyboard.c | 43 --------
Worksheet2_2/keyboard.h | 11 ---
Worksheet2_2/keyboard.o | Bin 944 -> 0 bytes
Worksheet2_2/kmain.c | 13 ---
Worksheet2_2/kmain.o | Bin 360 -> 0 bytes
Worksheet2_2/loader.s | 0
Worksheet2_2/pic.c | 19 ----
Worksheet2_2/pic.h | 14 ---
Worksheet2_2/pic.o | Bin 700 -> 0 bytes
Worksheet2_2/types.h | 13 ---
24 files changed, 354 deletions(-)
delete mode 100644 Worksheet2_2/Makefile
delete mode 100644 Worksheet2_2/frame_buffer.c
delete mode 100644 Worksheet2_2/frame_buffer.h
delete mode 100644 Worksheet2_2/hardware_interrupt_enabler.s
delete mode 100644 Worksheet2_2/interrupt_asm.o
delete mode 100644 Worksheet2_2/interrupt_asm.s
delete mode 100644 Worksheet2_2/interrupt_handlers.o
delete mode 100644 Worksheet2_2/interrupt_handlers.s
delete mode 100644 Worksheet2_2/interrupts.c
delete mode 100644 Worksheet2_2/interrupts.h
delete mode 100644 Worksheet2_2/interrupts.o
delete mode 100644 Worksheet2_2/io.h
delete mode 100644 Worksheet2_2/io.o
delete mode 100644 Worksheet2_2/io.s
delete mode 100644 Worksheet2_2/keyboard.c
delete mode 100644 Worksheet2_2/keyboard.h
delete mode 100644 Worksheet2_2/keyboard.o
delete mode 100644 Worksheet2_2/kmain.c
delete mode 100644 Worksheet2_2/kmain.o
delete mode 100644 Worksheet2_2/loader.s
delete mode 100644 Worksheet2_2/pic.c
delete mode 100644 Worksheet2_2/pic.h
delete mode 100644 Worksheet2_2/pic.o
delete mode 100644 Worksheet2_2/types.h
diff --git a/Worksheet2_2/Makefile b/Worksheet2_2/Makefile
deleted file mode 100644
index c63025f..0000000
--- a/Worksheet2_2/Makefile
+++ /dev/null
@@ -1,24 +0,0 @@
-LD = ld
-CC = gcc
-CFLAGS = -m32 -ffreestanding -nostdlib -fno-stack-protector
-AS = nasm
-ASFLAGS = -f elf
-
-SRC_DIR = .
-SOURCES = $(SRC_DIR)/kmain.c $(SRC_DIR)/pic.c $(SRC_DIR)/interrupts.c $(SRC_DIR)/keyboard.c
-ASM_SOURCES = $(SRC_DIR)/io.s $(SRC_DIR)/interrupt_asm.s $(SRC_DIR)/interrupt_handlers.s
-OBJECTS = $(SOURCES:.c=.o) $(ASM_SOURCES:.s=.o)
-
-all: kernel.elf
-
-kernel.elf: $(OBJECTS)
- $(LD) -m elf_i386 -Ttext 0x1000 -o kernel.elf $(OBJECTS)
-
-$(SRC_DIR)/%.o: $(SRC_DIR)/%.c
- $(CC) $(CFLAGS) -c $< -o $@
-
-$(SRC_DIR)/%.o: $(SRC_DIR)/%.s
- $(AS) $(ASFLAGS) $< -o $@
-
-clean:
- rm -f $(SRC_DIR)/*.o kernel.elf
diff --git a/Worksheet2_2/frame_buffer.c b/Worksheet2_2/frame_buffer.c
deleted file mode 100644
index f6eff01..0000000
--- a/Worksheet2_2/frame_buffer.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include "frame_buffer.h"
-#include "io.h"
-
-#define FRAME_BUFFER_ADDRESS 0xB8000
-#define MAX_COLS 80
-#define MAX_ROWS 25
-
-void fb_write_cell(u32int index, char c, u8int fg, u8int bg) {
- volatile char *fb = (volatile char *)FRAME_BUFFER_ADDRESS;
- fb[index * 2] = c;
- fb[index * 2 + 1] = (bg << 4) | (fg & 0x0F);
-}
diff --git a/Worksheet2_2/frame_buffer.h b/Worksheet2_2/frame_buffer.h
deleted file mode 100644
index 2351f7e..0000000
--- a/Worksheet2_2/frame_buffer.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef INCLUDE_FRAME_BUFFER_H
-#define INCLUDE_FRAME_BUFFER_H
-
-#include "types.h"
-
-#define FB_DARK_GREY 8
-#define FB_GREEN 2
-
-void fb_write_cell(u32int index, char c, u8int fg, u8int bg);
-
-#endif
diff --git a/Worksheet2_2/hardware_interrupt_enabler.s b/Worksheet2_2/hardware_interrupt_enabler.s
deleted file mode 100644
index e69de29..0000000
diff --git a/Worksheet2_2/interrupt_asm.o b/Worksheet2_2/interrupt_asm.o
deleted file mode 100644
index c189cad33ad2baedfad434b3ae14e29085b216ca..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001
literal 432
zcmb<-^>JflWMqH=Mh0dE1doBi0V-hvrZpH?8JNH<QVEcmAj}5UD8R_TzyW20C;<?`
zz`(%Hz`(!^WrHXMMg|5&5Ce)qW`LN23=AkP31Eb{l?AFFM1#zfgz`apKzITp1A`QZ
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qSrsUxLH>Y=34lUAGp{7IsHn7{BtEe?SFe~MCqFSIJ~O2Rst5oAUmSV>
diff --git a/Worksheet2_2/interrupt_asm.s b/Worksheet2_2/interrupt_asm.s
deleted file mode 100644
index da09acb..0000000
--- a/Worksheet2_2/interrupt_asm.s
+++ /dev/null
@@ -1,6 +0,0 @@
-global load_idt
-
-load_idt:
- mov eax, [esp + 4]
- lidt [eax]
- ret
diff --git a/Worksheet2_2/interrupt_handlers.o b/Worksheet2_2/interrupt_handlers.o
deleted file mode 100644
index 3c001059dbf17659fcea2285aa91ae9f13215e8e..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001
literal 576
zcmb<-^>JflWMqH=Mh0dE1doBi0V-hvrZpJY7?{8;QVEcmAj}5UXu!z8zz1c6C;<?`
zz`(%Hz`(!^WrHXOMg|6L5Ce)qW`LN23=AkPDPUw^NMK-KU_rtlGbPc?yTHi65C$>;
ziecs{GB7Z3Ld8Io0TTlQ2UIUe4ai&&KjFon|Ns9dp3h>)Qhfc1fq_A<B(<W1L9aNY
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J1PTl&9{?s(K}!Gt
diff --git a/Worksheet2_2/interrupt_handlers.s b/Worksheet2_2/interrupt_handlers.s
deleted file mode 100644
index 35fa4bc..0000000
--- a/Worksheet2_2/interrupt_handlers.s
+++ /dev/null
@@ -1,17 +0,0 @@
-extern interrupt_handler
-
-%macro no_error_code_interrupt_handler 1
-global interrupt_handler_%1
-interrupt_handler_%1:
- push dword 0
- push dword %1
- jmp common_interrupt_handler
-%endmacro
-
-common_interrupt_handler:
- pushad
- call interrupt_handler
- popad
- iret
-
-no_error_code_interrupt_handler 33
diff --git a/Worksheet2_2/interrupts.c b/Worksheet2_2/interrupts.c
deleted file mode 100644
index 80e84cc..0000000
--- a/Worksheet2_2/interrupts.c
+++ /dev/null
@@ -1,115 +0,0 @@
-#include "interrupts.h"
-#include "pic.h"
-#include "io.h"
-#include "frame_buffer.h"
-#include "keyboard.h"
-#include "types.h"
-
-#define INTERRUPTS_DESCRIPTOR_COUNT 256
-#define INTERRUPTS_KEYBOARD 33
-#define INPUT_BUFFER_SIZE 256
-
-u8int input_buffer[INPUT_BUFFER_SIZE];
-u8int buffer_index = 0;
-
-struct IDTDescriptor idt_descriptors[INTERRUPTS_DESCRIPTOR_COUNT];
-struct IDT idt;
-
-u32int BUFFER_COUNT;
-
-void interrupts_init_descriptor(s32int index, u32int address)
-{
- idt_descriptors[index].offset_high = (address >> 16) & 0xFFFF; // offset bits 0..15
- idt_descriptors[index].offset_low = (address & 0xFFFF); // offset bits 16..31
-
- idt_descriptors[index].segment_selector = 0x08; // The second (code) segment selector in GDT: one segment is 64b.
- idt_descriptors[index].reserved = 0x00; // Reserved.
-
- /*
- Bit: | 31 16 | 15 | 14 13 | 12 | 11 10 9 8 | 7 6 5 | 4 3 2 1 0 |
- Content: | offset high | P | DPL | S | D and GateType | 0 0 0 | reserved
- P If the handler is present in memory or not (1 = present, 0 = not present). Set to 0 for unused interrupts or for Paging.
- DPL Descriptor Privilige Level, the privilege level the handler can be called from (0, 1, 2, 3).
- S Storage Segment. Set to 0 for interrupt gates.
- D Size of gate, (1 = 32 bits, 0 = 16 bits).
- */
- idt_descriptors[index].type_and_attr = (0x01 << 7) | // P
- (0x00 << 6) | (0x00 << 5) | // DPL
- 0xe; // 0b1110=0xE 32-bit interrupt gate
-}
-
-void interrupts_install_idt()
-{
-
- interrupts_init_descriptor(INTERRUPTS_KEYBOARD, (u32int) interrupt_handler_33);
-
-
- idt.address = (s32int) &idt_descriptors;
- idt.size = sizeof(struct IDTDescriptor) * INTERRUPTS_DESCRIPTOR_COUNT;
- load_idt((s32int) &idt);
-
- /*pic_remap(PIC_PIC1_OFFSET, PIC_PIC2_OFFSET);*/
- pic_remap(PIC_1_OFFSET, PIC_2_OFFSET);
-
- // Unmask keyboard interrupt (IRQ1)
- outb(0x21, inb(0x21) & ~(1 << 1));
-}
-
-
-/* Interrupt handlers ********************************************************/
-
-void interrupt_handler(__attribute__((unused)) struct cpu_state cpu, u32int interrupt, __attribute__((unused)) struct stack_state stack) {
- u8int input;
- u8int ascii;
- static u32int fe_count = 0;
- static u32int debug_count = 0;
-
- switch (interrupt) {
- case INTERRUPTS_KEYBOARD:
- while ((inb(0x64) & 1)) {
- input = keyboard_read_scan_code();
-
- // Debug output
- /*fb_write_cell(debug_count * 3 + 0, 'x', FB_GREEN, FB_DARK_GREY);
- fb_write_cell(debug_count * 3 + 1, "0123456789ABCDEF"[input >> 4], FB_GREEN, FB_DARK_GREY);
- fb_write_cell(debug_count * 3 + 2, "0123456789ABCDEF"[input & 0xF], FB_GREEN, FB_DARK_GREY);*/
- debug_count++;
-
- // Track FE codes
- if (input == 0xFE) {
- fe_count++;
- continue;
- }
-
- // Only process if it's not a break code
- if (!(input & 0x80)) {
- if (input <= KEYBOARD_MAX_ASCII) {
- ascii = keyboard_scan_code_to_ascii(input);
- if (ascii != 0) {
- if (ascii == '\b') {
- if (BUFFER_COUNT > 0) {
- BUFFER_COUNT--;
- fb_write_cell(BUFFER_COUNT, ' ', FB_DARK_GREY, FB_GREEN);
- }
- }
- else if (ascii == '\n') {
- BUFFER_COUNT = ((BUFFER_COUNT / 80) + 1) * 80;
- }
- else {
- fb_write_cell(BUFFER_COUNT, ascii, FB_DARK_GREY, FB_GREEN);
- BUFFER_COUNT++;
- }
- }
- }
- }
-
- buffer_index = (buffer_index + 1) % INPUT_BUFFER_SIZE;
- }
-
- pic_acknowledge(interrupt);
- break;
-
- default:
- break;
- }
-}
\ No newline at end of file
diff --git a/Worksheet2_2/interrupts.h b/Worksheet2_2/interrupts.h
deleted file mode 100644
index be53adc..0000000
--- a/Worksheet2_2/interrupts.h
+++ /dev/null
@@ -1,40 +0,0 @@
-#ifndef INCLUDE_INTERRUPTS_H
-#define INCLUDE_INTERRUPTS_H
-
-#include "types.h"
-
-struct IDT {
- u16int size;
- u32int address;
-} __attribute__((packed));
-
-struct IDTDescriptor {
- u16int offset_low;
- u16int segment_selector;
- u8int reserved;
- u8int type_and_attr;
- u16int offset_high;
-} __attribute__((packed));
-
-struct cpu_state {
- u32int eax;
- u32int ebx;
- u32int ecx;
- u32int edx;
- u32int esi;
- u32int edi;
- u32int ebp;
-} __attribute__((packed));
-
-struct stack_state {
- u32int error_code;
- u32int eip;
- u32int cs;
- u32int eflags;
-} __attribute__((packed));
-
-void interrupts_install_idt();
-void interrupt_handler_33();
-void load_idt(u32int idt_address); // Declaration for the `load_idt` function
-
-#endif
diff --git a/Worksheet2_2/interrupts.o b/Worksheet2_2/interrupts.o
deleted file mode 100644
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GIT binary patch
literal 0
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diff --git a/Worksheet2_2/io.h b/Worksheet2_2/io.h
deleted file mode 100644
index 79bcf8c..0000000
--- a/Worksheet2_2/io.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef INCLUDE_IO_H
-#define INCLUDE_IO_H
-
-void outb(unsigned short port, unsigned char value); // Writes a byte to the given I/O port
-unsigned char inb(unsigned short port); // Reads a byte from the given I/O port
-
-#endif
diff --git a/Worksheet2_2/io.o b/Worksheet2_2/io.o
deleted file mode 100644
index 5eeb851de12d0a5f894a747042e4a05b097f548b..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001
literal 416
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diff --git a/Worksheet2_2/io.s b/Worksheet2_2/io.s
deleted file mode 100644
index da2d5f9..0000000
--- a/Worksheet2_2/io.s
+++ /dev/null
@@ -1,9 +0,0 @@
-global outb
-
-; outb - Writes a byte to the given I/O port
-; Parameters: AL contains the byte to write, DX contains the port address
-outb:
- mov dx, [esp + 4] ; Load the I/O port address into DX
- mov al, [esp + 8] ; Load the value into AL
- out dx, al ; Write the value to the port
- ret
diff --git a/Worksheet2_2/keyboard.c b/Worksheet2_2/keyboard.c
deleted file mode 100644
index 56a7d6c..0000000
--- a/Worksheet2_2/keyboard.c
+++ /dev/null
@@ -1,43 +0,0 @@
-#include "keyboard.h"
-#include "io.h"
-
-#define KEYBOARD_DATA_PORT 0x60
-
-u8int keyboard_read_scan_code() {
- return inb(KEYBOARD_DATA_PORT);
-}
-
-u8int keyboard_scan_code_to_ascii(u8int scan_code) {
- switch (scan_code) {
- case 0x1E: return 'a';
- case 0x30: return 'b';
- case 0x2E: return 'c';
- case 0x20: return 'd';
- case 0x12: return 'e';
- case 0x21: return 'f';
- case 0x22: return 'g';
- case 0x23: return 'h';
- case 0x17: return 'i';
- case 0x24: return 'j';
- case 0x25: return 'k';
- case 0x26: return 'l';
- case 0x32: return 'm';
- case 0x31: return 'n';
- case 0x18: return 'o';
- case 0x19: return 'p';
- case 0x10: return 'q';
- case 0x13: return 'r';
- case 0x1F: return 's';
- case 0x14: return 't';
- case 0x16: return 'u';
- case 0x2F: return 'v';
- case 0x11: return 'w';
- case 0x2D: return 'x';
- case 0x15: return 'y';
- case 0x2C: return 'z';
- case 0x39: return ' ';
- case 0x0E: return '\b';
- case 0x1C: return '\n';
- default: return 0;
- }
-}
diff --git a/Worksheet2_2/keyboard.h b/Worksheet2_2/keyboard.h
deleted file mode 100644
index aea190f..0000000
--- a/Worksheet2_2/keyboard.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef INCLUDE_KEYBOARD_H
-#define INCLUDE_KEYBOARD_H
-
-#include "types.h"
-
-#define KEYBOARD_MAX_ASCII 127 // Maximum ASCII value supported by the keyboard
-
-u8int keyboard_read_scan_code();
-u8int keyboard_scan_code_to_ascii(u8int scan_code);
-
-#endif
diff --git a/Worksheet2_2/keyboard.o b/Worksheet2_2/keyboard.o
deleted file mode 100644
index 7b401d5ea7ed604a6cb2ccef719e7e63d1bc2981..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001
literal 944
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diff --git a/Worksheet2_2/kmain.c b/Worksheet2_2/kmain.c
deleted file mode 100644
index 4806ffe..0000000
--- a/Worksheet2_2/kmain.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include "interrupts.h"
-#include "pic.h"
-#include "keyboard.h"
-
-void kmain() {
- // Initialize IDT and interrupts
- interrupts_install_idt();
-
- // Main terminal loop
- while (1) {
- // Continuously process user input
- }
-}
diff --git a/Worksheet2_2/kmain.o b/Worksheet2_2/kmain.o
deleted file mode 100644
index d7f6124a36047132193b1be82c5ec58f7dbeb105..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001
literal 360
zcmX^2>+L^w1_lOZ1_lO31_lNe1_p*d3=9km3J`t`h>ZmcFfcGkFfuTJXpnvo2I&VW
zjgK!$ttbJpAUHlg#5E!W!iJF`eIWfH`!pCKb}_IpG{EGIK;}c;#K6GE0Kp6lOi*zH
zMhM%35$se3ZUzR10GMVd4RQ|*LxqT@LOY)}zu|cC_5c6>FMt34{~zi<UP%T927ZvC
pP`5#u3=Hv^c_pbuMWqEL#qpVW#U+V3Iq{h(B@FS|xrv#13;?5ACD{M~
diff --git a/Worksheet2_2/loader.s b/Worksheet2_2/loader.s
deleted file mode 100644
index e69de29..0000000
diff --git a/Worksheet2_2/pic.c b/Worksheet2_2/pic.c
deleted file mode 100644
index 2e59879..0000000
--- a/Worksheet2_2/pic.c
+++ /dev/null
@@ -1,19 +0,0 @@
-#include "io.h"
-#include "pic.h"
-#include "types.h"
-
-void pic_remap(s32int offset1, s32int offset2) {
- outb(PIC_1, 0x11);
- outb(PIC_2, 0x11);
- outb(PIC_1 + 1, offset1);
- outb(PIC_2 + 1, offset2);
- outb(PIC_1 + 1, 0x04);
- outb(PIC_2 + 1, 0x02);
- outb(PIC_1 + 1, 0x01);
- outb(PIC_2 + 1, 0x01);
-}
-
-void pic_acknowledge(u32int interrupt) {
- if (interrupt < 40) outb(PIC_1, 0x20);
- if (interrupt >= 40) outb(PIC_2, 0x20);
-}
diff --git a/Worksheet2_2/pic.h b/Worksheet2_2/pic.h
deleted file mode 100644
index b3fda58..0000000
--- a/Worksheet2_2/pic.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef INCLUDE_PIC_H
-#define INCLUDE_PIC_H
-
-#include "types.h"
-
-#define PIC_1 0x20
-#define PIC_2 0xA0
-#define PIC_1_OFFSET 0x20 // Interrupt vector offset for PIC1
-#define PIC_2_OFFSET 0x28 // Interrupt vector offset for PIC2
-
-void pic_remap(s32int offset1, s32int offset2);
-void pic_acknowledge(u32int interrupt);
-
-#endif
diff --git a/Worksheet2_2/pic.o b/Worksheet2_2/pic.o
deleted file mode 100644
index 97a4d53beebf351f120dc505b4738deb2d0dbe68..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001
literal 700
zcmX^2>+L^w1_lOZ1_lO31_lNe1_p*d3=9km3J`t`h>ZnvF)}bnFfuTJXpnvo2I&VW
zjgK!$ttbJpAUHlg#5E!W!iJF`eIWfH`&5`17`Q+ZEDQ}G3WSXq7#Jj=Zen2IV}M`=
z1}3O@2@}N4Gng0{R2Uc-xEUB20zev(Fi0&3!`y`=MUWZV`Ly{BN4G0aw=2hS78L~s
z28QD<DlCEw3=A(G{Qv*|IE%^xWU({<|Nn<5Rb*gb;NNzj(?x~l#Wt`g&v6!&g-D_c
zAo@WHL1u!2;6)Ea45SPs26Fa`3Wyj?9mpFmQXpb5bzrf8|Ns9tAK{2SoR+4?FW&<8
z8_fM2&9xjF{LLaDw<5d&^3DrMkT#HP6I2%FA+YT4e^5gi7#JDB;m-S*0Ya~V(lekm
z$VMgx2HpZFKL$#>L1_ahEd!-_Kw-hiz;FN>zx*IyFfcI4Liu11#1~{H#}}pMCKfP&
YnTg5SdHLlzsVV8H4DtD;B}ohn0MpccAOHXW
diff --git a/Worksheet2_2/types.h b/Worksheet2_2/types.h
deleted file mode 100644
index f417311..0000000
--- a/Worksheet2_2/types.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef INCLUDE_TYPES_H
-#define INCLUDE_TYPES_H
-
-typedef unsigned char u8int; // 8-bit unsigned integer
-typedef char s8int; // 8-bit signed integer
-
-typedef unsigned short u16int; // 16-bit unsigned integer
-typedef short s16int; // 16-bit signed integer
-
-typedef unsigned int u32int; // 32-bit unsigned integer
-typedef int s32int; // 32-bit signed integer
-
-#endif
--
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