fixet bug with boot from FDD B:

src/bios/exp/FUNC_RAM_ROM_DRV.ASM

@@ -255,7 +255,7 @@ EMM_FN3M_ERR:
 
 
 
-;
+;		WARNING!!! ­¥ âண âì DE
 ;----------------------------------------------------------------------;
 ;               �®«ãç¨âì áâà ­¨æã N ª«îç  K
 ;               ‚室:	 A - Š‹ž— RAM-Disk, B - ­®¬¥à áâà ­¨æë
@@ -287,7 +287,7 @@ EMM_F4M_L1:
 	DEC B
 	JR Z,EMM_F4M_END
 	LD L,A
-	CP 0FFH
+	CP #FF
 	JR NZ,EMM_F4M_L1
 EMM_F4M_ERR:
 	LD L,A

src/bios/rom/SETUP/MAIN.asm

@@ -890,7 +890,8 @@ RECOVERYstart:
 PrepareToBOOT:
         CALL	INT_OFF
 	CALL	G_VALUE
-	LD	B,A
+	;LD	B,A
+	LD	B,0
         ;   FDD
 	OR	A
 	JR	Z,FDSTART                                               ; FDD A:
@@ -1556,7 +1557,6 @@ TRDOSX:
 	RET 
 
 ; ®âªà뢠¥â ¯®àâ #FE ­  ç⥭¨¥ ¢ 3-© ª à⥠¯®à⮢
-
 ; OPENDOS:
 ; 	DI 
 ; 	IN	A,(SLOT3)