diff --git a/edlin.asm b/edlin.asm
index 37940bf..6e23bde 100644
--- a/edlin.asm
+++ b/edlin.asm
@@ -158,8 +158,11 @@ open_file:
 	int 0x21
 
 delete_old_bak: ; 01b9
+	; Borrow the FCB we'll be later using to create the new file with
+	; Since we are done with the old .BAK before we start using it for
+	; its main purpose, this is safe
 	mov si, psp_fcb_1
-	mov di, __0a58_fcb
+	mov di, new_file_fcb
 	mov cx, 9
 	rep movsb
 
@@ -168,12 +171,19 @@ delete_old_bak: ; 01b9
 	movsb
 
 	mov ah, sys_delete_file
-	mov dx, __0a58_fcb
+	mov dx, new_file_fcb
 	int 0x21
 
-	; TODO: Why .$$$? What is this used for?
+create_new_file:
+	; Create the new file we'll be writing to. EDLIN never writes to
+	; the file we opened for reading, but instead renames that one to
+	; .BAK and then writes out the changed contents to a new file
+	;
+	; The file is called .$$$ until we either exit without saving in
+	; which case it's deleted, or with saving, in which case it's
+	; renamed to the original extension
 	mov al, '$'
-	mov di, __0a58_fcb + fcb_extension
+	mov di, new_file_fcb + fcb_extension
 	stosb
 	stosb
 	stosb
@@ -194,12 +204,12 @@ setup_file_parameters: ; 01ec
 	xorw r_ax, r_ax
 	mov [psp_fcb_1 + fcb_record_low], ax
 	mov [psp_fcb_1 + fcb_record_high], ax
-	mov [__0a58_fcb + fcb_record_low], ax
-	mov [__0a58_fcb + fcb_record_high], ax
+	mov [new_file_fcb + fcb_record_low], ax
+	mov [new_file_fcb + fcb_record_high], ax
 
 	inc ax
 	mov [psp_fcb_1 + fcb_record_size], ax
-	mov [__0a58_fcb + fcb_record_size], ax
+	mov [new_file_fcb + fcb_record_size], ax
 
 	mov dx, file_buffer
 	movw r_di, r_dx
@@ -552,7 +562,7 @@ __043f:
 	mov ah, sys_set_dta
 	int 0x21
 
-	mov dx, __0a58_fcb
+	mov dx, new_file_fcb
 	mov ah, sys_random_block_write
 	int 0x21
 	orb r_al, r_al
@@ -1248,7 +1258,7 @@ command_q: ; 08a6
 	cmp al, 'Y'
 	jne newline
 
-	mov dx, __0a58_fcb
+	mov dx, new_file_fcb
 	mov ah, sys_close_file
 	int 0x21
 
@@ -1273,7 +1283,7 @@ command_e: ; 08cd
 	int 0x21
 
 	mov cx, 1
-	mov dx, __0a58_fcb
+	mov dx, new_file_fcb
 	mov ah, sys_random_block_write
 	int 0x21
 
@@ -1294,11 +1304,11 @@ command_e: ; 08cd
 	int 0x21
 
 	mov si, psp_fcb_1
-	mov di, __0a58_fcb + fcb_rename_target - 1
+	mov di, new_file_fcb + fcb_rename_target - 1
 	mov cx, 6 ; 6*2 = 12 bytes (as we copy words). 1 (drive specifier) + 8 (name) + 3 (extension)
 	rep movsw
 
-	mov dx, __0a58_fcb
+	mov dx, new_file_fcb
 	int 0x21
 
 	int 0x20
@@ -1347,7 +1357,7 @@ quit_prompt db "Abort edit (Y/N)? $" ; 0a45
 
 ; 0a58
 section .bss
-__0a58_fcb resb 37 ; 0a58 … 0a7c
+new_file_fcb resb 37 ; 0a58 … 0a7c
 
 __0a7d resb 1