diff --git a/cfg/apple2-asm.cfg b/cfg/apple2-asm.cfg
index e70ed4484..1e187764c 100644
--- a/cfg/apple2-asm.cfg
+++ b/cfg/apple2-asm.cfg
@@ -8,13 +8,15 @@ SYMBOLS {
     __LOADSIZE__: type = weak, value = __BSS_RUN__ - __CODE_RUN__;
 }
 MEMORY {
+    ZP:                start = $0080, size = $001A,      define = yes;
     HEADER: file = %O, start = $0000, size = $0004;
     RAM:    file = %O, start = %S,    size = $C000 - %S;
 }
 SEGMENTS {
-    EXEHDR: load = HEADER, type = ro,  optional = yes;
-    CODE:   load = RAM,    type = rw,  optional = yes, define = yes;
-    RODATA: load = RAM,    type = ro,  optional = yes;
-    DATA:   load = RAM,    type = rw,  optional = yes;
-    BSS:    load = RAM,    type = bss, optional = yes, define = yes;
+    ZEROPAGE: load = ZP,     type = zp,  optional = yes;
+    EXEHDR:   load = HEADER, type = ro,  optional = yes;
+    CODE:     load = RAM,    type = rw,  optional = yes, define = yes;
+    RODATA:   load = RAM,    type = ro,  optional = yes;
+    DATA:     load = RAM,    type = rw,  optional = yes;
+    BSS:      load = RAM,    type = bss, optional = yes, define = yes;
 }
diff --git a/cfg/atari-asm.cfg b/cfg/atari-asm.cfg
index 3fea61917..4ff7c3173 100644
--- a/cfg/atari-asm.cfg
+++ b/cfg/atari-asm.cfg
@@ -25,5 +25,6 @@ SEGMENTS {
     DATA:      load = RAM,        type = rw                 optional = yes;
     BSS:       load = RAM,        type = bss, define = yes, optional = yes;
     ZEROPAGE:  load = ZP,         type = zp,                optional = yes;
+    EXTZP:     load = ZP,         type = zp,                optional = yes; # to enable modules to be able to link to C and assembler programs
     AUTOSTRT:  load = TRAILER,    type = ro,                optional = yes;
 }
diff --git a/cfg/c64-asm.cfg b/cfg/c64-asm.cfg
index 0924cdb56..1ab80be8e 100644
--- a/cfg/c64-asm.cfg
+++ b/cfg/c64-asm.cfg
@@ -5,6 +5,7 @@ SYMBOLS {
     __LOADADDR__: type = import;
 }
 MEMORY {
+    ZP:       file = "", start = $0002,  size = $001A,      define = yes;
     LOADADDR: file = %O, start = %S - 2, size = $0002;
     RAM:      file = %O, start = %S,     size = $D000 - %S;
 }
@@ -15,4 +16,5 @@ SEGMENTS {
     RODATA:   load = RAM,      type = ro,  optional = yes;
     DATA:     load = RAM,      type = rw,  optional = yes;
     BSS:      load = RAM,      type = bss, optional = yes;
+    ZEROPAGE: load = ZP,       type = zp,  optional = yes;
 }