further RAM disk and floppy code integration

src/dos_m65/dos_vectab_unit.s

@@ -7,8 +7,8 @@
 dos_cmd_OPEN_vectab:
 
 	!word unit_sd_cmd_OPEN
-	!word unit_fd_cmd_OPEN
-	!word unit_rd_cmd_OPEN
+	!word unit_disk_cmd_OPEN
+	!word unit_disk_cmd_OPEN
 
 
 dos_cmd_CLOSE_vectab:

src/dos_m65/pseudoiec/msg_ciout.s

@@ -72,9 +72,7 @@ msg_CIOUT_cmdfn_F0:                    ; get next byte of status - floppy
 	stx F0_CMDFN_IDX
 	lda #$A0
 	sta F0_CMDFN_BUF,x
-	plp
-	+bcs unit_fd_cmd_OPEN_EOI          ; if EOI - execute command
-	jmp dos_EXIT_CLC
+	bra msg_CIOUT_cmdfn_FX
 
 msg_CIOUT_cmdfn_F1:                    ; get next byte of status - floppy
 
@@ -87,9 +85,7 @@ msg_CIOUT_cmdfn_F1:                    ; get next byte of status - floppy
 	stx F1_CMDFN_IDX
 	lda #$A0
 	sta F1_CMDFN_BUF,x
-	plp
-	+bcs unit_fd_cmd_OPEN_EOI          ; if EOI - execute command
-	jmp dos_EXIT_CLC
+	bra msg_CIOUT_cmdfn_FX
 
 msg_CIOUT_cmdfn_RD:                    ; get next byte of status - ram disk
 
@@ -102,8 +98,13 @@ msg_CIOUT_cmdfn_RD:                    ; get next byte of status - ram disk
 	stx RD_CMDFN_IDX
 	lda #$A0
 	sta RD_CMDFN_BUF,x
+
+	; FALLTROUGH
+
+msg_CIOUT_cmdfn_FX:                    ; common pard for floppy and RAM disk
+
 	plp
-	+bcs unit_rd_cmd_OPEN_EOI          ; if EOI - execute command
+	+bcs unit_disk_cmd_OPEN_EOI        ; if EOI - execute command
 	jmp dos_EXIT_CLC
 
 msg_CIOUT_cmdfn_vectab:

src/dos_m65/unit_disk/unit_fd_cmd_open.s

@@ -6,14 +6,15 @@
 ; XXX add support for both floppies
 
 
-unit_fd_cmd_OPEN:
+unit_disk_cmd_OPEN:
 
 	lda #$01                 ; mode: receive command or file name
-	sta F0_MODE
+	ldx PAR_FSINSTANCE
+	sta XX_MODE, x
 
 	jmp dos_EXIT_CLC
 
-unit_fd_cmd_OPEN_EOI:
+unit_disk_cmd_OPEN_EOI:
 
 	; XXX this dispatcher is temporary
 
@@ -26,16 +27,28 @@ unit_fd_cmd_OPEN_EOI:
 	dey
 	bpl @lp1
 
-	; XXX add support for second floppy
+	ldx PAR_FSINSTANCE
+	cmp #$02
+	beq @f1
+	bcs @rd
 
 	lda F0_CMDFN_BUF
+	+skip_2_bytes_trash_nvz
+@f1:
+	lda F1_CMDFN_BUF
+	+skip_2_bytes_trash_nvz
+@rd:
+	lda RD_CMDFN_BUF
+
 	cmp #'$'
-	beq unit_fd_cmd_OPEN_dir
+	beq unit_fd_cmd_OPEN_dir           ; XXX add support for second floppy and RAM disk
 
 	; FALLTROUGH
 
 unit_fd_cmd_OPEN_file:
 
+	; XXX add support for second floppy and RAM disk
+
 	; Copy the filter from command     XXX this should be moved to common part and deduplicated with directory opening
 
 	ldy #$00

src/dos_m65/unit_ramdisk/unit_rd_cmd_open.s

@@ -6,12 +6,6 @@
 ; XXX to be unified with floppy code
 
 
-unit_rd_cmd_OPEN:
-
-	; XXX provide implementation
-
-	jmp dos_EXIT_SEC
-
 unit_rd_cmd_OPEN_EOI:
 
 	; XXX provide implementation