Added filetable!!!!

Also did more Makefile changes

Makefile

@@ -9,11 +9,19 @@ SRC = ./src
 BUILD = ./build
 # C_FILES = $(shell find $(SRC) -name "*.c" -exec basename -s ".c" {} \;)
 
+.PHONY: os clean run
+
 # Main compilation target
-os: bootloader kernel
-	@cat $(BUILD)/boot.bin $(BUILD)/kernel.bin > $(BUILD)/os.bin
+os: $(BUILD) bootloader kernel
+	@$(AS) -fbin  -o $(BUILD)/filetable.bin $(SRC)/filetable.asm
+	@cat $(BUILD)/boot.bin $(BUILD)/filetable.bin $(BUILD)/kernel.bin > $(BUILD)/os.bin
 	@dd if=/dev/zero of=kern.iso bs=512 count=2880
 	@dd if=$(BUILD)/os.bin of=kern.iso conv=notrunc
+	@dd if=$(SRC)/fs/test.txt of=kern.iso bs=512 seek=22 conv=notrunc
+
+$(BUILD):
+	@[ -d $(BUILD) ] || mkdir $(BUILD)
+	@rm -rf $(BUILD)/*
 
 # Bootloader: This target is responsible for creating boot.bin
 bootloader:
@@ -31,6 +39,6 @@ run:
 
 # Clean all build files
 clean:
-	@rm -rf $(BUILD)/*
+	@rm -rf $(BUILD)
 	@rm -f kern.iso
 

docs/main.md

@@ -11,7 +11,8 @@ Kern uses a shell (for now), so you'll have to type commands to do stuff.
 It is currently quite simple. It supports these commands:
 
 - clear: Clears the screen
-- echo <msg>: Prints msg to the screen
+- disk \<r/w> \<sector> [data]: Reads/Writes data from/to sector on disk
+- echo \<msg>: Prints msg to the screen
 - exit: Exits the shell
 - help: Prints all available commands
 - ls: Prints all files

src/boot.asm

@@ -36,7 +36,7 @@ start:
     mov al, KERNEL_SIZE
     mov ch, 0   ; Cylinder
     mov dh, 0   ; Head
-    mov cl, 2   ; Sector
+    mov cl, 3   ; Sector - 1 is this file, 2 is filetable
     mov dl, [driveNum]
 
     mov ah, 2   ; Read from disk

src/filetable.asm

@@ -0,0 +1,19 @@
+[bits 16]
+
+;;
+;; Filetable layout
+;; 0-9 : Filename
+;; 10-12 : Filetype
+;; 13 : RESERVED
+;; 14 : Starting sector
+;; 15 : File Length (in sectors)
+;;
+
+filetable:
+    db "boot",0,0,0,0,0,0, "bin",0,0,1
+    db "filetable",0,      "tab",0,1,1
+    db "kernel",0,0,0,0,   "bin",0,2,20
+    db "test",0,0,0,0,0,0, "txt",0,22,1
+
+times 512-($-$$) db 0
+

src/fs/test.txt

@@ -0,0 +1 @@
+This is a test file. Should be saved in test.txt!

src/kernel.c

@@ -111,9 +111,50 @@ void main() {
             print(" echo       | Prints a message to stdout\n", 0x0f);
             print(" exit       | Exits shell\n", 0x0f);
             print(" help       | Prints this message\n", 0x0f);
-            // TODO: print(" ls         | Lists all available files\n", 0x0f);
+            print(" ls         | Lists all available files\n", 0x0f);
             // TODO: print(" reboot     | Reboots the system\n", 0x0f);
             print(" test       | Performs tests\n", 0x0f);
+        } else if (strcmp(input, "ls") == 0) {
+            char filetab[512];
+            char* ft = filetab;
+            diskRead(1, 1, filetab);
+            
+            while (*ft != '\0') {
+                char filename[15] = { 0 };
+                uint8_t offset = 0;
+                for (uint8_t i = 0; i < 14; i++) {
+                    if (i == 9) {
+                        filename[offset++] = '.';
+                        continue;
+                    }
+                    if (*ft != '\0') { filename[offset++] = *ft; }
+                    ft++;
+                }
+                ft++; // RESERVED
+
+                uint8_t sector = *ft++;
+                uint8_t size = *ft++;
+
+                if (sector < 10) putc('0', 0x0f);
+                if (sector == 0) putc('0', 0x0f);
+                else print(itoa(sector, 10), 0x0f);
+                print(": ", 0x0f);
+                print(filename, 0x0f);
+
+                for (uint8_t i = 14 - strlen(filename); i > 0; i--) {
+                    putc(' ', 0x0f);
+                }
+
+                print(" | ", 0x0f);
+                if (size >> 1) {
+                    print(itoa(size >> 1, 10), 0x0f);
+                    if (size & 0x01) { print(".5", 0x0f); }
+                    print("kB\n", 0x0f);
+                } else {
+                    print(itoa(size*512, 10), 0x0f);
+                    print("B\n", 0x0f);
+                }
+            }
         } else if (strcmp(input, "test") == 0) {
             print("Running Tests...\n", 0x0f);
             uint8_t buf[512];
@@ -142,3 +183,4 @@ void main() {
         }
     }
 }
+