Move IDE/compiler ZP variables to it's own section.

This ensures that interpreter ZP locations don't change between
versions.

Author: dmsc

compiler/fastbasic.cfg

@@ -47,6 +47,7 @@ FORMATS {
 
 SEGMENTS {
     ZEROPAGE: load = ZP,      type = zp,  optional = yes;
+    IDEZP:    load = ZP,      type = zp,  optional = yes;
     PREHEAD:  load = PREMAIN, type = rw,  optional = yes, define = yes;
     JUMPTAB:  load = MAIN,    type = ro,                  define = yes, align = $100;
     RUNTIME:  load = MAIN,    type = rw,                  define = yes;

src/actions.asm

@@ -108,7 +108,7 @@ loop_stk        =       $400
 var_stk         =       $480
 
 ;----------------------------------------------------------
-        .zeropage
+        .segment "IDEZP": zeropage
         ; Relocation amount
 reloc_addr:     .res    2
 last_label_num: .res    1

src/memptr.asm

@@ -30,7 +30,7 @@
         .exportzp       prog_ptr, array_ptr, var_buf, var_ptr, mem_end
         .exportzp       label_buf, label_ptr, laddr_buf, laddr_ptr, end_ptr
 
-        .zeropage
+        .segment "IDEZP": zeropage
 
         ; End of program to parse
 end_ptr:        .res    2

src/parse.asm

@@ -47,7 +47,7 @@
         .import         error_msg_list
         .importzp       ERR_PARSE, ERR_NO_ELOOP, ERR_LABEL, ERR_TOO_LONG
 
-        .zeropage
+        .segment "IDEZP": zeropage
 buf_ptr:.res 2
 bmax:   .res 1
 pptr:   .res 2

src/vars.asm

@@ -40,7 +40,7 @@ CIX     = $F2
 INBUFF  = $F3
 
 ; Our internal pointers:
-        .zeropage
+        .segment "IDEZP": zeropage
 name:   .res 2
 var:    .res 2
 len:    .res 1