diff --git a/sim_card.c b/sim_card.c
index 95e3c1ba..d1bf4d78 100644
--- a/sim_card.c
+++ b/sim_card.c
@@ -22,7 +22,7 @@
    This is the standard card reader.
    This is the standard card punch.
 
-   Input formats are accepted in a variaty of formats:
+   Input formats are accepted in a variety of formats:
         Standard ASCII: one record per line.
                 returns are ignored.
                 tabs are expanded to modules 8 characters.
@@ -46,7 +46,7 @@
                 Bits 5-0 are character.
 
         CBN Format:
-                Each record 160 charaters.
+                Each record 160 characters.
                 First char has bit 7 set. Rest set to 0.
                 Bit 6 is odd parity.
                 Bit 5-0 of first character are top 6 bits
@@ -62,7 +62,7 @@
     is not enough octal numbers to span a full card the remainder of the
     card will not be punched.
 
-    Also ~eor, will generate a 7/8/9 punch card. An ~eof will gernerate a
+    Also ~eor, will generate a 7/8/9 punch card. An ~eof will generate a
     6/7/9 punch card, and a ~eoi will generate a 6/7/8/9 punch.
 
     A single line of ~ will set the EOF flag when that card is read.
@@ -251,7 +251,10 @@ static const uint16          ascii_to_dec_029[128] = {
     0x604, 0x602, 0x601, 0xA00, 0xC00, 0x600, 0x700,0xf000
 };
 
-
+#if SIMH_EVER_USES_THIS
+/* This is a static const that isn't referenced in this code.
+ * Kept for historical reference.
+ */
 static const uint16          ascii_to_hol_ebcdic[128] = {
    /* Control                              */
     0xf000,0xf000,0xf000,0xf000,0xf000,0xf000,0xf000,0xf000,    /*0-37*/
@@ -295,6 +298,7 @@ static const uint16          ascii_to_hol_ebcdic[128] = {
    /*                     X18     X78    Y18  XYT18        */
     0x604, 0x602, 0x601, 0x902, 0x806, 0x502, 0xF02,0xf000
 };
+#endif
 
 const char          sim_ascii_to_six[128] = {
    /* Control                              */
@@ -431,7 +435,7 @@ static struct card_formats fmts[] = {
 
 /* Conversion routines */
 
-/* Convert BCD character into hollerith code */
+/* Convert BCD character into Hollerith code */
 uint16
 sim_bcd_to_hol(uint8 bcd) {
     uint16      hol;
@@ -476,7 +480,7 @@ sim_bcd_to_hol(uint8 bcd) {
     return hol;
 }
 
-/* Returns the BCD of the hollerith code or 0x7f if error */
+/* Returns the BCD of the Hollerith code or 0x7f if error */
 uint8
 sim_hol_to_bcd(uint16 hol) {
     uint8                bcd;
@@ -526,7 +530,7 @@ sim_hol_to_bcd(uint16 hol) {
     return bcd;
 }
 
-/* Convert EBCDIC character into hollerith code */
+/* Convert EBCDIC character into Hollerith code */
 uint16
 sim_ebcdic_to_hol(uint8 ebcdic) {
    return ebcdic_to_hol[ebcdic];
@@ -534,7 +538,7 @@ sim_ebcdic_to_hol(uint8 ebcdic) {
 
 
 
-/* Returns the BCD of the hollerith code or 0x7f if error */
+/* Returns the BCD of the Hollerith code or 0x7f if error */
 uint16
 sim_hol_to_ebcdic(uint16 hol) {
     return hol_to_ebcdic[hol];
@@ -984,7 +988,7 @@ _sim_read_deck(UNIT * uptr, int eof)
 
     buf.len = 0;
     buf.size = 0;
-    buf.buffer[0] = 0; /* Initialize bufer to empty */
+    buf.buffer[0] = 0; /* Initialize buffer to empty */
 
     /* Slurp up current file */
     do {
@@ -1011,7 +1015,7 @@ _sim_read_deck(UNIT * uptr, int eof)
                    sim_uname(uptr), uptr->filename, sim_error_text(r), cards);
         }
         data->hopper_cards++;
-        /* Move data to start at begining of buffer */
+        /* Move data to start at beginning of buffer */
         /* Data is moved down to simplify the decoding of one card */
         l = buf.len - buf.size;
         j = buf.size;
@@ -1056,7 +1060,7 @@ sim_punch_card(UNIT * uptr, uint16 image[80])
 /* Convert word record into column image */
 /* Check output type, if auto or text, try and convert record to bcd first */
 /* If failed and text report error and dump what we have */
-/* Else if binary or not convertable, dump as image */
+/* Else if binary or not convertible, dump as image */
 
     /* Try to convert to text */
     uint8                out[512];
diff --git a/sim_card.h b/sim_card.h
index 8ae61a48..19fdd025 100644
--- a/sim_card.h
+++ b/sim_card.h
@@ -22,7 +22,7 @@
    This is the standard card reader.
    This is the standard card punch.
 
-   Input formats are accepted in a variaty of formats:
+   Input formats are accepted in a variety of formats:
         Standard ASCII: one record per line.
                 returns are ignored.
                 tabs are expanded to modules 8 characters.
@@ -47,7 +47,7 @@
                 Bits 5-0 are character.
 
         CBN Format:
-                Each record 160 charaters.
+                Each record 160 characters.
                 First char has bit 7 set. Rest set to 0.
                 Bit 6 is odd parity.
                 Bit 5-0 of first character are top 6 bits
@@ -70,7 +70,7 @@
     is not enough octal numbers to span a full card the remainder of the
     card will not be punched.
 
-    Also ~eor, will generate a 7/8/9 punch card. An ~eof will gernerate a
+    Also ~eor, will generate a 7/8/9 punch card. An ~eof will generate a
     6/7/9 punch card, and a ~eoi will generate a 6/7/8/9 punch.
 
     A single line of ~ will set the EOF flag when that card is read.