Bump fn-lib version. Capture screen to ascii

Author: markjfisher

makefiles/custom-atari.mk

@@ -60,7 +60,7 @@ DISKZ_FILE := $(DIST_DIR)/$(PROGRAM)-z.atr
 # At the current time, ATARI800 does not have any integration with fujinet
 
 ALTIRRA ?= $(ALTIRRA_HOME)/Altirra64.exe \
-  $(XS)/portable $(XS)/portablealt:altirra-debug.ini \
+  $(XS)/portable $(XS)/portablealt:altirra-basic.ini \
   $(XS)/debug \
   $(XS)/debugcmd: ".loadsym build\$(PROGRAM_TGT).lbl" \
 

makefiles/fujinet-lib.mk

@@ -1,4 +1,4 @@
-FUJINET_LIB_VERSION := 4.5.0
+FUJINET_LIB_VERSION := 4.7.2
 
 FUJINET_LIB = _libs
 # is target correct, or platform? eg. atarixl vs atari, pet vs c64 vs commodore

src/atari/common/screen/ascii_to_code.s

@@ -1,4 +1,5 @@
         .export     ascii_to_code
+        .export     _code_to_ascii
 
 ; common routine to convert ascii code in A into internal code for screen
 ; from cc65/libsrc/atari/cputc.s
@@ -11,4 +12,40 @@ codeok: lsr     a               ; undo the shift
         bcc     :+
         eor     #$80            ; restore the inverse bit
 :       rts
-.endproc
+.endproc
+
+;;; char code_to_ascii(char c)
+;;;
+;;; Convert a screen code to an ASCII character.
+;;;
+;;; Input: A - Screen code
+;;; Output: A - ASCII character
+
+; I wrote this with pencil and paper to check the bits.
+; logically: A between 0-63 add 32, between 64-95 sub 64, 96-127 do nothing.
+; Same for 127+ bit, just preserve inverse bit.
+
+.proc   _code_to_ascii
+        asl     a                ; capture inverse bit in c
+        adc     #$00             ; move inverse bit into bit 0 while we test top bits
+
+        clc
+        bpl     under_64
+
+        ; for range 64-95, subtract 64.
+        ; for range 96-127, do nothing.
+        adc     #$c0             ; manipluate the top bits to check what range we are in
+        eor     #$40             ; wrt original A: range 64-95 it flips bit 6 to 0, 96-127 it flips bit 6 to 1
+
+reset_inverse_bit:
+        lsr     a
+        bcc     :+
+        eor     #$80             ; restore the inverse bit
+:       rts
+
+under_64:
+        ; add 32 to the original A, the value will be shifted so we add 64 pre-shift
+        adc     #$40
+        bcc     reset_inverse_bit
+
+.endproc

src/atari/full/screen/mod_screen_data.s

@@ -204,7 +204,7 @@ mx_pref_edit_help:
 
                 NORMAL_CHARMAP
 mx_k_app_name:  .byte "Config-NG", 0
-mx_v_app_name:  .byte "(c) 2024 Fenrock", 0
+mx_v_app_name:  .byte "(c) 2025 Fenrock", 0
 
 mx_k_version:   .byte "Version", 0