From 2f3b4f6e6bbb5585076c82aa05685a781c2c44aa Mon Sep 17 00:00:00 2001
From: Tom-on64 <kubecekt@gmail.com>
Date: Fri, 8 Mar 2024 19:28:09 +0100
Subject: [PATCH] Before C Switch

---
 README.md        |  2 ++
 src/fs/edit.asm  |  6 +++-
 src/kernel.asm   | 71 ++++++++++++++++++++++++------------------------
 src/lib/disk.asm |  7 +++--
 4 files changed, 47 insertions(+), 39 deletions(-)

diff --git a/README.md b/README.md
index cf1071d..0812f44 100644
--- a/README.md
+++ b/README.md
@@ -39,3 +39,5 @@ _These images may be outdated, Idk_
 - If you run the kernel.bin, loading files sorta breaks, because the program is running at 0x8000, but it thinks that it's at 0x2000 (i think)
 - If you run anything in the code editor and return to the kernel, you won't be able to load any files
 - If you type only the starting letters of a command, it will still run (i.e. 'he' will run help)
+
+## [Old Version](https://github.com/Tom-on64/old-kern)
diff --git a/src/fs/edit.asm b/src/fs/edit.asm
index 0e86338..0637402 100644
--- a/src/fs/edit.asm
+++ b/src/fs/edit.asm
@@ -256,6 +256,10 @@ getInput:
 
 ; Expects al to contain an ASCII character, will set bx to it's hex equivalent
 asciiToHex:
+    cmp al, 'F'
+    jle .upperCase
+    sub al, 32
+.upperCase:
     cmp al, '9'
     jle .getHex
     sub al, 7
@@ -275,7 +279,7 @@ saveFileMsg: db "Save as:                              ", 0 ; Make sure to erase
 openFileMsg: db "Open file:                            ", 0
 bytesMsg: db " Bytes", 0
 ; savedMsg: db "Saved file as '", 0
-; oepenedMsg: db "Editing file '", 0
+; openedMsg: db "Editing file '", 0
 runMsg: db ENDL, ENDL, 0
 ranMsg: db ENDL, ENDL, " - Finished Execution - ", ENDL, 0
 notFoundMsg: db "File not found!           ", 0 ; Erase the user input
diff --git a/src/kernel.asm b/src/kernel.asm
index 62e8118..fd6a2d8 100644
--- a/src/kernel.asm
+++ b/src/kernel.asm
@@ -66,23 +66,16 @@ input:
     je input
 
 tokenize:           ; Tokenize 
-    mov byte cl, [inputLen]
-    mov di, tokens
-.tokenLoop:
-    lodsb
-    cmp al, 0       ; Check for end of input
-    je runCommand
-.wsLoop:
-    cmp al, ' '     ; Compare with whitespace
-    jne .stringLoop
-    lodsb
-    jmp .wsLoop
-.stringLoop:
-    cmp al, ' '
-    je .next
-    
-.next:
-    
+    mov si, userInput
+.loop:
+    inc si
+    cmp byte [si], 0
+    je .done
+    cmp byte [si], ' '
+    jne .loop
+    mov byte [si], 0
+    jmp .loop
+.done:
 
 ; Runs a command in userInput
 ; Expects tokenized input
@@ -188,25 +181,33 @@ foundProgram:
 
     inc bx          ; Ignore Number of FT entries for now
 
-    mov cl, [es:bx] ; Starting sector
-    inc bx
-    mov al, [es:bx] ; Number of sectors to read
-    push ax         ; Save file size
+    ; mov cl, [es:bx] ; Starting sector
+    ; inc bx
+    ; mov al, [es:bx] ; Number of sectors to read
+    ; push ax         ; Save file size
 
-    mov ah, 0       ; Reset disk system
-    mov dl, byte [driveNum]
-    int 0x13
+    ; mov ah, 0       ; Reset disk system
+    ; mov dl, byte [driveNum]
+    ; int 0x13
 
-    mov bx, PROGRAM_LOC
-    mov es, bx
-    xor bx, bx      ; [es:bx] - Place to load out program
+    ; mov bx, PROGRAM_LOC
+    ; mov es, bx
+    ; xor bx, bx      ; [es:bx] - Place to load out program
 
-    mov ah, 2       ; Read sectors into memory
-    mov dl, byte [driveNum]
-    mov ch, 0       ; Cylinder
-    mov dh, 0       ; Head
-    int 0x13
-    jnc .loaded     ; Loaded file successfully
+    ; mov ah, 2       ; Read sectors into memory
+    ; mov dl, byte [driveNum]
+    ; mov ch, 0       ; Cylinder
+    ; mov dh, 0       ; Head
+    ; int 0x13
+
+    mov byte dl, [driveNum] ; Drive number
+    push word userInput     ; Filename
+    push word PROGRAM_LOC   ; Dest. segment
+    push word 0x0000        ; Dest. offset
+    call loadFile
+
+    cmp byte al, 0
+    je .loaded     ; Loaded file successfully
 
     mov si, programLoadFailMsg
     call print
@@ -491,10 +492,8 @@ fileExt: db "   ", 0
 binExt: db "bin", 0
 txtExt: db "txt", 0
 
-tokens: times 50 db 0 ; char[10][5] (List of 5 strings that are 10 chars long each or null terminated) 
-tokenLen: times 5 db 0 ; 5 lengths for each token
-tokenCount: db 0
 inputLen: db 0
+tokenCount: db 0
 userInput: times 80 db 0
 
 ;; Constants
diff --git a/src/lib/disk.asm b/src/lib/disk.asm
index 004e89f..59a11e7 100644
--- a/src/lib/disk.asm
+++ b/src/lib/disk.asm
@@ -1,7 +1,7 @@
 ;
 ; Loads a file from the filetable into a memory location
 ; Params:
-;   dl - Disk number
+;   dl - Disk number (byte)
 ;   Filename (Null terminated)
 ;   Destination location segment
 ;   Destination location offset
@@ -42,6 +42,9 @@ loadFile:
     stosb
     loop .filenamePadLoop
 .filenameDone:
+    mov si, fileName
+    call print
+
     mov ax, FILETAB_LOC
     mov es, ax
     xor di, di      ; es:di - Filetable location
@@ -311,8 +314,8 @@ returnToCaller:
 ;   Filename
 ;
 removeFile:
+    ret
     
-
 ;; Variables
 availableSector: db 0
 exitCode: db 0