diff --git a/STATUS.md b/STATUS.md
index 829bf221..74180053 100644
--- a/STATUS.md
+++ b/STATUS.md
@@ -79,7 +79,7 @@ NOTE: Even the 'DONE' routines won't support features described as missing in on
 | $FF9C   | MEMBOT | DONE     |                                         |
 | $FF9F   | SCNKEY | DONE     | could be better integrated with ROM     |
 | $FFA2   | SETTMO | NOT DONE |                                         |
-| $FFA5   | ACPTR  | NOT DONE | * work in progress                      |
+| $FFA5   | ACPTR  | PARTIAL  | * work in progress                      |
 | $FFA8   | CIOUT  | DONE     |                                         |
 | $FFAB   | UNTLK  | PARITAL  | * work in progress                      |
 | $FFAE   | UNLSN  | DONE     |                                         |
@@ -93,8 +93,8 @@ NOTE: Even the 'DONE' routines won't support features described as missing in on
 | $FFC6   | CHKIN  | PARTIAL  | * work in progress                      |
 | $FFC9   | CHKOUT | PARTIAL  | * work in progress                      |
 | $FFCC   | CLRCHN | PARTIAL  | * work in progress                      |
-| $FFCF   | CHRIN  | NOT DONE | * work in progress                      |
-| $FFD2   | CHROUT | NOT DONE | * work in progress                      |
+| $FFCF   | CHRIN  | PARTIAL  |                                         |
+| $FFD2   | CHROUT | PARTIAL  |                                         |
 | $FFD5   | LOAD   | PARTIAL  | no VERIFY support yet                   |
 | $FFD8   | SAVE   | NOT DONE | * work in progress                      |
 | $FFDB   | SETTIM | NOT DONE |                                         |
diff --git a/c64/aliases/,aliases_ram_lowmem.s b/c64/aliases/,aliases_ram_lowmem.s
index 60c67bb4..c0a88d1d 100644
--- a/c64/aliases/,aliases_ram_lowmem.s
+++ b/c64/aliases/,aliases_ram_lowmem.s
@@ -81,7 +81,7 @@
 	.alias ICKOUT     $320
 	.alias ICLRCH     $322
 	.alias IBASIN     $324
-	.alias IBASOUT    $326
+	.alias IBSOUT     $326
 	.alias ISTOP      $328
 	.alias IGETIN     $32A
 	.alias ICLALL     $32C
diff --git a/c64/basic/ab1e.print_string.s b/c64/basic/ab1e.print_string.s
index 0ea252a3..83f8d366 100644
--- a/c64/basic/ab1e.print_string.s
+++ b/c64/basic/ab1e.print_string.s
@@ -20,7 +20,7 @@ print_string_loop:
 	lda (temp_string_ptr),y
 	beq print_string_end
 
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 	txa
 	tay
diff --git a/c64/basic/basic_cold_start.s b/c64/basic/basic_cold_start.s
index 341e0909..325bd1ed 100644
--- a/c64/basic/basic_cold_start.s
+++ b/c64/basic/basic_cold_start.s
@@ -29,7 +29,7 @@ startup_banner:
 	jsr print_integer	
 
 	lda #$20
-	jsr JCHROUT
+	jsr via_IBSOUT
 	
 	;; Print the rest of the start up message
 	ldx #34
diff --git a/c64/basic/basic_do_error.s b/c64/basic/basic_do_error.s
index 731f99c2..92d7e46d 100644
--- a/c64/basic/basic_do_error.s
+++ b/c64/basic/basic_do_error.s
@@ -7,9 +7,9 @@ basic_do_error:
 
 	;; Print ? at start
 	lda #$0d
-	jsr JCHROUT
+	jsr via_IBSOUT
 	lda #$3f
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 	;; Print main part of error message
 	pla
@@ -18,7 +18,7 @@ basic_do_error:
 
 	;; Print ERROR at end
 	lda #$20
-	jsr JCHROUT
+	jsr via_IBSOUT
 	ldx #33
 	jsr print_packed_message
 
@@ -27,9 +27,9 @@ basic_do_error:
 	;; XXX print line number if not in direct mode
 
 	lda #$0d
-	jsr JCHROUT
+	jsr via_IBSOUT
 	lda #$0d
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 	;; Reset stack, and go back to main loop
 	ldx #$fe
diff --git a/c64/basic/basic_main_loop.s b/c64/basic/basic_main_loop.s
index 69e12c9d..2d7afdd6 100644
--- a/c64/basic/basic_main_loop.s
+++ b/c64/basic/basic_main_loop.s
@@ -52,7 +52,7 @@ rsl_l1:	lda $0200,x
 *	
 	;; Do printing of the new line
 	lda #$0d
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 	;; Ignore empty lines
 	lda tokenise_work1
diff --git a/c64/basic/cmd_break.s b/c64/basic/cmd_break.s
index 36128422..31194132 100644
--- a/c64/basic/cmd_break.s
+++ b/c64/basic/cmd_break.s
@@ -17,7 +17,7 @@ basic_do_break:
 	
 *
 	lda #$0d
-	jsr JCHROUT
+	jsr via_IBSOUT
 cmd_end:
 	jmp basic_main_loop
 	
diff --git a/c64/basic/cmd_list.s b/c64/basic/cmd_list.s
index d58af209..13038f54 100644
--- a/c64/basic/cmd_list.s
+++ b/c64/basic/cmd_list.s
@@ -36,7 +36,7 @@ list_more_lines:
 	pla
 	jsr print_integer
 	lda #$20
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 	;; Iterate through printing out the line
 	;; contents
@@ -105,17 +105,17 @@ list_not_rem:
 	bne list_print_loop
 
 list_is_literal:
-	jsr JCHROUT
+	jsr via_IBSOUT
 	iny
 	bne list_print_loop
 	
 list_end_of_line:
 	;; Clear reverse flag
 	lda #$92
-	jsr JCHROUT
+	jsr via_IBSOUT
 	;; Print end of line
 	lda #$0d
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 	;; Now link to the next line
 	jsr basic_find_next_line
diff --git a/c64/basic/print_integer.s b/c64/basic/print_integer.s
index f5d93fa7..7e897243 100644
--- a/c64/basic/print_integer.s
+++ b/c64/basic/print_integer.s
@@ -115,7 +115,7 @@ found_start_of_number:
 	;; Print digits
 *	lda $0100,y
 	ora #$30
-	jsr JCHROUT
+	jsr via_IBSOUT
 	iny
 	cpy #5
 	bne -
diff --git a/c64/basic/print_packed_message.s b/c64/basic/print_packed_message.s
index 006bf70e..7aac0876 100644
--- a/c64/basic/print_packed_message.s
+++ b/c64/basic/print_packed_message.s
@@ -38,7 +38,7 @@ found_message_in_token_stream:
 	beq +
 	jsr print_packed_word
 	lda #$20
-	jsr JCHROUT
+	jsr via_IBSOUT
 	pla
 	tay
 	iny
@@ -47,7 +47,7 @@ found_message_in_token_stream:
 	pla
 	;; Rub out space at the end
 	lda #$14
-	jsr JCHROUT
+	jsr via_IBSOUT
 	rts
 
 print_packed_word:
@@ -144,7 +144,7 @@ next_packed_word_char:
 
 	;; X=1-14 = first 14 chars, so subtract one
 	lda packed_message_chars-1,x
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 	;; See if there is a char in the low nybl to print
 	pla
@@ -171,7 +171,7 @@ has_nybl:
 	
 	;; X=1-14 = first 14 chars, so subtract one
 	lda packed_message_chars-1,x
-	jsr JCHROUT
+	jsr via_IBSOUT
 *
 	pla
 	tay
@@ -207,7 +207,7 @@ unpack_literal_char:
 	tya
 	pha
 	lda (temp_string_ptr),y
-	jsr JCHROUT
+	jsr via_IBSOUT
 	pla
 	tay
 	rts
diff --git a/c64/basic/printf.s b/c64/basic/printf.s
index ceb4337b..85fa0cf8 100644
--- a/c64/basic/printf.s
+++ b/c64/basic/printf.s
@@ -112,7 +112,7 @@ not_hexword:
 
 not_pointer:	
 	;; Print character
-	jsr JCHROUT
+	jsr via_IBSOUT
 
 printf_nextchar:
 	jsr printf_advance
@@ -148,11 +148,11 @@ printf_printhexbyte:
 	cmp #$3A
 	bcc +
 	adc #6
-*	jsr JCHROUT
+*	jsr via_IBSOUT
 	pla
 	and #$0f
 	ora #$30
 	cmp #$3A
 	bcc +
 	adc #6
-*	jmp JCHROUT
+*	jmp via_IBSOUT
diff --git a/c64/basic/via_vector.s b/c64/basic/via_vector.s
index d17e36a5..e6a0be1a 100644
--- a/c64/basic/via_vector.s
+++ b/c64/basic/via_vector.s
@@ -21,8 +21,8 @@ via_ICLRCH:
 via_IBASIN:
 	jmp (IBASIN)
 
-via_IBASOUT:
-	jmp (IBASOUT)
+via_IBSOUT:
+	jmp (IBSOUT)
 	
 via_ISTOP:
 	jmp (ISTOP)
diff --git a/c64/basic/wedge_dos.s b/c64/basic/wedge_dos.s
index 1c7726ec..172c50e1 100644
--- a/c64/basic/wedge_dos.s
+++ b/c64/basic/wedge_dos.s
@@ -55,9 +55,10 @@ wedge_dos_command:
 	jsr JREADST ; retrieve errors
 	;; XXX error in case of status != 0
 *   
+	;; XXX this loop does not seem to work, check it
 	jsr basic_fetch_and_consume_character
 	beq +
-	jsr JCHROUT
+	jsr via_IBSOUT
 	;; XXX check errors here
 	jmp -
 *
@@ -100,13 +101,16 @@ wedge_dos_status:
 *
 	jsr JREADST ; retrieve errors
 	;; XXX error in case of status != 0
-*   
 	;; Print out everything retrieved from the drive
 	bne +
-	jsr JCHRIN
-	jsr JCHROUT
+	jsr via_IBASIN
+	jsr via_IBSOUT
 	jmp -
 *
+	;; Print new line
+	lda #$0D
+	jsr via_IBSOUT
+
 	;; Clean-up and exit
 	jmp wedge_dos_clean_exit
 
diff --git a/c64/kernal/acptr.s b/c64/kernal/acptr.s
index b6fd88be..028233c2 100644
--- a/c64/kernal/acptr.s
+++ b/c64/kernal/acptr.s
@@ -8,5 +8,10 @@
 ;; CPU registers that has to be preserved (see [RG64]): .Y
 ;;
 
+;; XXX preserve register Y!
+
 acptr:
-	rts
+	;; XXX temporary implementation
+	jsr kernalstatus_reset
+	jmp iec_rx_byte
+
diff --git a/c64/kernal/vector.s b/c64/kernal/vector.s
index c0ad2d58..5fb49426 100644
--- a/c64/kernal/vector.s
+++ b/c64/kernal/vector.s
@@ -79,7 +79,7 @@ vector_defaults:
 	.word ckout    ;; ICKOUT
 	.word clrchn   ;; ICLRCH
 	.word chrin    ;; IBASIN
-	.word chrout   ;; IBASOUT
+	.word chrout   ;; IBSOUT
 	.word stop     ;; ISTOP
 	.word getin    ;; IGETIN
 	.word clall    ;; ICLALL