fixed DOS memory mapping

src/kernal/board_m65/mega65_map_helpers.s

@@ -77,13 +77,12 @@ map_DOS_1:
 	lda #$C0
 	tab                      // from now on, zeropage starts from $C000
 
-	ldy #$00
-	lda #$41
+	ldy #$40
+	lda #$40
 	taz                      // $C000 <- map 8KB from $10000
 
-	// XXX what should be the value here??
-	lda #$A0
-	ldx #$C2                 // $4000 <- map 16KB from ?????
+	lda #$C0
+	ldx #$C1                 // $4000 <- map 16KB from $20000
 
 	map
 	jmp_8 map_end_no_eom     // no EOM, we do not want interrupts within DOS!

src/kernal/iec_fast/m65dos_bridge.s

@@ -6,16 +6,16 @@
 //
 
 
-.label VDOS_INIT    = $4000
-.label VDOS_HASUNIT = $4002
-.label VDOS_ACPTR   = $4004
-.label VDOS_CIOUT   = $4006
-.label VDOS_LISTEN  = $4008
-.label VDOS_SECOND  = $400A
-.label VDOS_TALK    = $400C
-.label VDOS_TKSA    = $400E
-.label VDOS_UNTLK   = $4010
-.label VDOS_UNLSN   = $4012
+.label VDOS_INIT    = $4000 +  0 * 2
+.label VDOS_CHKUNIT = $4000 +  1 * 2
+.label VDOS_ACPTR   = $4000 +  2 * 2
+.label VDOS_CIOUT   = $4000 +  3 * 2
+.label VDOS_LISTEN  = $4000 +  4 * 2
+.label VDOS_SECOND  = $4000 +  5 * 2
+.label VDOS_TALK    = $4000 +  6 * 2
+.label VDOS_TKSA    = $4000 +  7 * 2
+.label VDOS_UNTLK   = $4000 +  8 * 2
+.label VDOS_UNLSN   = $4000 +  9 * 2
 
 
 // XXX connect this to core IEC implementation
@@ -24,13 +24,13 @@
 m65dos_init:
 
 	jsr map_DOS_1
-	// XXX do after memory mapping is correct: jsr_ind VDOS_INIT
+	jsr_ind VDOS_INIT
 	jmp_8 !+
 
-m65dos_hasunit:
+m65dos_chkunit:
 
 	jsr map_DOS_1
-	jsr_ind VDOS_HASUNIT
+	jsr_ind VDOS_CHKUNIT
 	jmp_8 !+
 
 m65dos_acptr: