4 files changed, 20 insertions, 15 deletions
diff --git a/Build/source/texk/web2c/ptexdir/ChangeLog b/Build/source/texk/web2c/ptexdir/ChangeLog
index 4caf6979306..a74cc8e1597 100644
--- a/Build/source/texk/web2c/ptexdir/ChangeLog
+++ b/Build/source/texk/web2c/ptexdir/ChangeLog
@@ -1,3 +1,9 @@
+2022-01-29  Hironobu Yamashita  <h.y.acetaminophen@gmail.com>
+
+	* ptex-base.ch: Fix \chardef code 256 in math.
+	  Fix \mathcode for 128--255 not working.
+	  https://github.com/texjporg/tex-jp-build/issues/129
+
 2022-01-27  Hironori Kitagawa  <h_kitagawa2001@yahoo.co.jp>
 
 	* ptex-base.ch: Fix a mistake and avoid compiler warnings.
@@ -12,6 +18,7 @@
 	* ptex.defines: Add multistrlen{short,filename}, fromBUFFshort.
 	* ptex_version.h: Version p4.0.0.
 	* tests/filename_test.sh, tests/printkanji.tex: Added.
+	  https://github.com/texjporg/tex-jp-build/issues/81
 
 2022-01-10  Karl Berry  <karl@freefriends.org>
 
diff --git a/Build/source/texk/web2c/ptexdir/ptex-base.ch b/Build/source/texk/web2c/ptexdir/ptex-base.ch
index a771451154e..d6e205cecb3 100644
--- a/Build/source/texk/web2c/ptexdir/ptex-base.ch
+++ b/Build/source/texk/web2c/ptexdir/ptex-base.ch
@@ -6060,7 +6060,7 @@ begin KANJI(cx):=0;
 restart: @<Get the next non-blank non-relax...@>;
 reswitch:case cur_cmd of
 letter,other_char,char_given:
-  if (is_char_ascii(cur_chr) or (cur_chr=256)) then begin
+  if is_char_ascii(cur_chr) then begin
     c:=ho(math_code(cur_chr));
     if c=@'100000 then
       begin @<Treat |cur_chr| as an active character@>;
@@ -6111,16 +6111,14 @@ mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
 @y
 mmode+letter,mmode+other_char,mmode+char_given:
   if is_char_ascii(cur_chr) then
-    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
-    else set_math_char(cur_chr)
+    set_math_char(ho(math_code(cur_chr)))
   else set_math_kchar(cur_chr);
 mmode+kanji,mmode+kana,mmode+other_kchar: begin
     cx:=cur_chr; set_math_kchar(KANJI(cx));
   end;
 mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
   if is_char_ascii(cur_chr) then
-    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
-    else set_math_char(cur_chr)
+    set_math_char(ho(math_code(cur_chr)))
   else set_math_kchar(cur_chr);
   end;
 @z
diff --git a/Build/source/texk/web2c/uptexdir/ChangeLog b/Build/source/texk/web2c/uptexdir/ChangeLog
index ec4c711d7e7..e7de0652135 100644
--- a/Build/source/texk/web2c/uptexdir/ChangeLog
+++ b/Build/source/texk/web2c/uptexdir/ChangeLog
@@ -1,3 +1,7 @@
+2022-01-29  Hironobu Yamashita  <h.y.acetaminophen@gmail.com>
+
+	* uptex-m.ch: Adapt to ptex-base.ch fixes.
+
 2022-01-23  TANAKA Takuji  <ttk@t-lab.opal.ne.jp>
 
 	* uptex-m.ch, upbibtex.ch, updvitype.ch, uppltotf.ch, uptftopl.ch,
diff --git a/Build/source/texk/web2c/uptexdir/uptex-m.ch b/Build/source/texk/web2c/uptexdir/uptex-m.ch
index 1d1a3376a55..c12721adfb7 100644
--- a/Build/source/texk/web2c/uptexdir/uptex-m.ch
+++ b/Build/source/texk/web2c/uptexdir/uptex-m.ch
@@ -955,10 +955,10 @@ else if cur_cmd=kchar_num then
 
 @x
 letter,other_char,char_given:
-  if (is_char_ascii(cur_chr) or (cur_chr=256)) then begin
+  if is_char_ascii(cur_chr) then begin
 @y
 letter,other_char,char_given:
-  if (cur_chr>=0)and(cur_chr<=256) then begin
+  if check_echar_range(cur_chr) then begin
 @z
 
 @x
@@ -982,31 +982,27 @@ kanji,kana,other_kchar,hangul: cx:=cur_chr;
 @x
 mmode+letter,mmode+other_char,mmode+char_given:
   if is_char_ascii(cur_chr) then
-    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
-    else set_math_char(cur_chr)
+    set_math_char(ho(math_code(cur_chr)))
   else set_math_kchar(cur_chr);
 mmode+kanji,mmode+kana,mmode+other_kchar: begin
     cx:=cur_chr; set_math_kchar(KANJI(cx));
   end;
 mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
   if is_char_ascii(cur_chr) then
-    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
-    else set_math_char(cur_chr)
+    set_math_char(ho(math_code(cur_chr)))
   else set_math_kchar(cur_chr);
   end;
 @y
 mmode+letter,mmode+other_char,mmode+char_given:
   if check_echar_range(cur_chr) then
-    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
-    else set_math_char(cur_chr)
+    set_math_char(ho(math_code(cur_chr)))
   else set_math_kchar(cur_chr);
 mmode+kanji,mmode+kana,mmode+other_kchar,mmode+hangul: begin
     cx:=cur_chr; set_math_kchar(KANJI(cx));
   end;
 mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
   if check_echar_range(cur_chr) then
-    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
-    else set_math_char(cur_chr)
+    set_math_char(ho(math_code(cur_chr)))
   else set_math_kchar(cur_chr);
   end;
 mmode+kchar_given: