Added scanlines to 320x256 Mode-X in DOS port.

zsnes/src/dos/dosintrf.asm

@@ -1040,7 +1040,7 @@ db '                 ',0
 ; Left side starts with Video Mode 0
 NEWSYM GUI16VID, db 0,0,0,0,0,0,1,0,1,0,1,0,1,0,1,0     ; 16-bit mode
 NEWSYM GUINGVID, db 1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,0     ; New Graphics Mode Available
-NEWSYM GUISLVID, db 0,0,1,0,0,0,1,0,0,1,1,0,0,1,1,0     ; Scanlines
+NEWSYM GUISLVID, db 0,0,1,0,0,1,1,0,0,1,1,0,0,1,1,0     ; Scanlines
 NEWSYM GUIINVID, db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0     ; Interpolation
 NEWSYM GUIEAVID, db 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0     ; Eagle
 NEWSYM GUIIEVID, db 0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0     ; (Interp | Eagle)

zsnes/src/dos/initvid.asm

@@ -39,7 +39,14 @@ NEWSYM res480, resb 1
 SECTION .text
 
 NEWSYM dosinitvideo2
+    cmp byte[cvidmode],2
+    jne .nomodeq
     jmp dosinitvideo.initmodeq256
+.nomodeq
+    cmp byte[cvidmode],5
+    jne .nomodex
+    jmp dosinitvideo.initmodex256
+.nomodex
 
 ;*******************************************************
 ; InitVideo
@@ -157,7 +164,14 @@ NEWSYM dosinitvideo
 
 .initmodex256
 %ifdef __MSDOS__
+    cmp byte[scanlines],1
+    je near .scanlines2
     SetVGAMode .Mode320x256
+    jmp .done2    
+.scanlines2
+    SetVGAMode .Mode320x256s
+    jmp .done2
+.done2
     call cscopymodex
 %endif
     call makepal

zsnes/src/dos/vga.inc

@@ -123,6 +123,14 @@ SECTION .data
     dw 03c4h,00604h,03ceh,04005h,03ceh,00506h,03c0h,04110h,03c0h,00013h
     dd 0
 
+.Mode320x256s
+    dw 03c2h,0e300h,03d4h,05f00h,03d4h,04f01h,03d4h,05002h,03d4h,08203h
+    dw 03d4h,05404h,03d4h,08005h,03d4h,02306h,03d4h,01d07h,03d4h,00008h
+    dw 03d4h,06009h,03d4h,00a10h,03d4h,0ac11h,03d4h,0ff12h,03d4h,02813h
+    dw 03d4h,00014h,03d4h,00715h,03d4h,01a16h,03d4h,0e317h,03c4h,00101h
+    dw 03c4h,00604h,03ceh,04005h,03ceh,00506h,03c0h,04110h,03c0h,00013h
+    dd 0
+
 
 SECTION .text
 %endif