Change loadf so that it aborts if the load fails and so that it doesn’t print error messages itself, only sends an error code to the program that called it.

src/LOADF.INC

@@ -53,13 +53,10 @@ pop ax
 call .checkconv
 jmp .extloop
 
-;Set the carry flag and print an error message if the file name is invalid
+;Set the carry flag if the file name is invalid
 .error:
 pop ax
 stc
-mov si, .errormsg
-mov ah, 0x2
-int 0x21
 jmp .done
 
 ;Find and load the file
@@ -81,6 +78,8 @@ mov al, 0x1
 ;Load
 mov ah, 0x2
 int 0x13
+;Abort if the load failed
+jc .done
 
 ;Store the disk values used for the rest of the call
 mov ax, word [buffer + 0xb]
@@ -146,11 +145,8 @@ add di, ax
 pop cx
 loop .search
 
-;Set the carry flag and print an error message if the file is not found
+;Set the carry flag if the file is not found
 stc
-mov si, .errormsg
-mov ah, 0x2
-int 0x21
 jmp .clearstack
 
 ;Load the file entry
@@ -261,7 +257,6 @@ iret
 .sectorspertrack dw 0x0
 .sides           dw 0x0
 .file            times 0xb db 0x20
-.errormsg        db "File not found", 0x0
 .cluster         dw 0x0
 .pointer         dw 0x0
 

src/SYSTEM.ASM

@@ -77,7 +77,7 @@ mov ah, 0x0
 int 0x21
 ;Read
 mov di, input
-mov al, 0x4e
+mov al, 0x4c
 mov ah, 0x3
 int 0x21
 
@@ -105,12 +105,6 @@ jmp 0x2000
 
 ;Print a command error message and return to the shell
 cmderror:
-mov bh, 0x0
-mov ah, 0x3
-int 0x10
-dec dh
-mov ah, 0x2
-int 0x10
 mov si, cmderrormsg
 mov ah, 0x2
 int 0x21
@@ -169,7 +163,7 @@ welcomemsg   db 0xd, 0xa, "Welcome to EttinOS!", 0xd, 0xa, 0x0
 prompt       db "> ", 0x0
 driverrormsg db "Unknown drive", 0x0
 cmderrormsg  db "Unknown command", 0x0
-input        times 0x4e db 0x0
+input        times 0x4c db 0x0
 crlf         db 0xd, 0xa, 0x0
 
 ;Set the drive letter