diff --git a/include/atmos.h b/include/atmos.h
index 460a0010f..9b1b021c1 100644
--- a/include/atmos.h
+++ b/include/atmos.h
@@ -169,6 +169,17 @@ void atmos_tock (void);
 void atmos_zap (void);
 /* Raygun sound effect */
 
+
+/* The following #defines will cause the matching function prototypes
+** in conio.h to be overlaid by macroes with the same names,
+** thereby saving the function call overhead.
+*/
+#define _textcolor(color)       COLOR_WHITE
+#define _bgcolor(color)         COLOR_BLACK
+#define _bordercolor(color)     COLOR_BLACK
+#define _cpeekcolor(color)      COLOR_WHITE
+
+
 void waitvsync (void);
 /* Wait for start of next frame */
 
diff --git a/libsrc/atmos/cpeekc.s b/libsrc/atmos/cpeekc.s
new file mode 100644
index 000000000..f0f5f99b1
--- /dev/null
+++ b/libsrc/atmos/cpeekc.s
@@ -0,0 +1,21 @@
+;
+; 2016-02-28, Groepaz
+; 2017-06-19, Greg King
+;
+; char cpeekc (void);
+;
+; Atmos version
+;
+
+        .export         _cpeekc
+
+        .import         setscrptr
+        .importzp       ptr2
+
+
+_cpeekc:
+        jsr     setscrptr       ; Set ptr2 and .Y to the cursor's address
+        lda     (ptr2),y        ; Get char
+        and     #<~$80          ; Remove revers() bit
+        ldx     #>$0000
+        rts
diff --git a/libsrc/atmos/cpeekchar.s b/libsrc/atmos/cpeekchar.s
deleted file mode 100644
index fba51bf72..000000000
--- a/libsrc/atmos/cpeekchar.s
+++ /dev/null
@@ -1,30 +0,0 @@
-
-    .include    "atmos.inc"
-
-    .export _cpeekc
-
-_cpeekc:
-
-    ldy CURS_Y
-    ldx ScrTabLo,y
-    stx @l+1
-    ldx ScrTabHi,y
-    stx @l+2
-    ldx CURS_X
-@l:
-    lda $bb80,x
-;;  inc COORDX_TEXT
-    ldx #0
-    rts
-
-    ; FIXME: is that table available elsewhere?
-.rodata
-ScrTabLo:
-    .repeat 28, Line
-        .byte   <(SCREEN + Line * 40)
-    .endrep
-
-ScrTabHi:
-    .repeat 28, Line
-        .byte   >(SCREEN + Line * 40)
-    .endrep
diff --git a/libsrc/atmos/cpeekcolor.s b/libsrc/atmos/cpeekcolor.s
new file mode 100644
index 000000000..307c04e96
--- /dev/null
+++ b/libsrc/atmos/cpeekcolor.s
@@ -0,0 +1,10 @@
+;
+; 2017-06-03, Greg King
+;
+; unsigned char cpeekcolor (void);
+;
+; Atmos version
+;
+
+        .import         return1
+        .export         _cpeekcolor := return1  ; always COLOR_WHITE
diff --git a/libsrc/atmos/cpeekrevers.s b/libsrc/atmos/cpeekrevers.s
new file mode 100644
index 000000000..53f907511
--- /dev/null
+++ b/libsrc/atmos/cpeekrevers.s
@@ -0,0 +1,22 @@
+;
+; 2017-06-08, Greg King
+;
+; unsigned char cpeekrevers (void);
+;
+; Atmos version
+;
+
+        .export         _cpeekrevers
+
+        .import         setscrptr
+        .importzp       ptr2
+
+
+_cpeekrevers:
+        jsr     setscrptr       ; Set ptr2 and .Y to the cursor's address
+        lda     (ptr2),y        ; Get char
+        and     #$80            ; get reverse bit
+        asl     a
+        tax                     ; ldx #>$0000
+        rol     a               ; return boolean value
+        rts
diff --git a/libsrc/atmos/cpeeks.s b/libsrc/atmos/cpeeks.s
new file mode 100644
index 000000000..e54563e7d
--- /dev/null
+++ b/libsrc/atmos/cpeeks.s
@@ -0,0 +1,54 @@
+;
+; 2017-06-20, Greg King
+;
+; void cpeeks (char* s, unsigned length);
+;
+
+        .export         _cpeeks
+
+        .import         setscrptr, popax
+        .importzp       ptr1, ptr2, ptr3, tmp1, tmp2
+
+        .macpack        generic
+
+
+_cpeeks:
+        eor     #<$FFFF         ; counting a word upward is faster
+        sta     ptr3            ; so, we use -(length + 1)
+        txa
+        eor     #>$FFFF
+        sta     ptr3+1
+
+        jsr     setscrptr       ; Set ptr2 and .Y to the cursor's address
+        sty     tmp2
+
+        jsr     popax
+        sta     tmp1            ; (will be a .Y index)
+        stx     ptr1+1
+        ldx     #<$0000
+        stx     ptr1
+        bze     L3              ; branch always
+
+L4:     ldy     tmp2
+        lda     (ptr2),y        ; Get char
+        iny
+        bnz     L2
+        inc     ptr2+1
+L2:     sty     tmp2
+        and     #<~$80          ; Remove reverse bit
+        ldy     tmp1
+        sta     (ptr1),y
+        iny
+        bnz     L1
+        inc     ptr1+1
+L1:     sty     tmp1
+
+L3:     inc     ptr3            ; count length
+        bnz     L4
+        inc     ptr3+1
+        bnz     L4
+
+        txa                     ; terminate the string
+        ldy     tmp1
+        sta     (ptr1),y
+        rts
diff --git a/targettest/Makefile b/targettest/Makefile
index 4d989d0df..35b767727 100644
--- a/targettest/Makefile
+++ b/targettest/Makefile
@@ -540,12 +540,13 @@ EXELIST_sym1 = \
 	strnlen \
 	strqtok-test
 
-# omitted: clock-test cpeek-test conio deb dir-test em-test exec-test1 exec-test2
+# omitted: clock-test cpeek-test deb dir-test em-test exec-test1 exec-test2
 # fileio-test ft mouse-test posixio-test rename-test seek ser-test
 EXELIST_atmos = \
 	minimal \
 	arg-test \
 	clock \
+	conio \
 	cprintf \
 	cursor \
 	div-test \
diff --git a/targettest/conio.c b/targettest/conio.c
index e054319e5..56fc5dcda 100644
--- a/targettest/conio.c
+++ b/targettest/conio.c
@@ -24,6 +24,12 @@
 #define NUMCOLS          16
 #endif
 
+#if defined(__ATMOS__)
+// FIXME: those should be defined elsewhere?
+#define CH_HLINE '-'
+#define CH_VLINE '!'
+#endif
+
 static char grid[5][5] = {
     {CH_ULCORNER, CH_HLINE, CH_TTEE,  CH_HLINE, CH_URCORNER},
     {CH_VLINE,    ' ',      CH_VLINE, ' ',      CH_VLINE   },
@@ -73,6 +79,14 @@ void peektest(void)
         revers(rbuf[j]);
         cputc(buf[j]);
     }
+    gotoxy(0, LINE_PEEKTEST);
+    cpeeks(buf, NUMCOLS);
+    (void)textcolor(1);
+    revers(0);
+    gotoxy(20, LINE_PEEKTEST);
+    for (j = 0; j < NUMCOLS; ++j) {
+        cputc(buf[j]);
+    }
 }
 
 void main(void)