Add target atari7800

2022-03-01 06:44:26 +02:00
parent f8cdb2ab63
commit 328781bf8a
8 changed files with 476 additions and 0 deletions
--- a/cfg/atari7800.cfg
+++ b/cfg/atari7800.cfg
@@ -0,0 +1,50 @@
+# Atari VCS 7800 linker configuration file for cc65
+
+SYMBOLS {
+    __STACKSIZE__:        type = weak, value = $0010; # 16 bytes stack
+}
+
+MEMORY {
+    ZP:     file = "", define = yes, start = $0040, size = $00C0, type = rw;
+    SP:     file = "", define = yes, start = $0140, size = $00C0, type = rw;
+    RAM1:   file = "", define = yes, start = $1800, size = $0840, type = rw;
+    RAM2:   file = "", define = yes, start = $2100, size = $0040, type = rw;
+    RAM3:   file = "", define = yes, start = $2200, size = $0600, type = rw;
+    # "Normal" cartridge rom. Multiple banks arent supported
+    # by this script. You may change the rom size, but keep
+    # two things in mind:
+    # - start must be a multiple of $1000
+    # - ROM must end at $ff79
+    ROM:    file = %O, define = yes, start = $8000, size = $7f7a, type = ro, fill = yes, fillval = $ff;
+    # Encryption stuff
+    ROME:   file = %O, start = $ff7a, size = $80, type = ro, fill = yes, fillval = $ff;
+    # Interrupt vectors
+    ROMV:   file = %O, start = $fffa, size = $6, type = ro, fill = yes, fillval = $ff;
+}
+
+SEGMENTS {
+    ZEROPAGE:   load = ZP,              type = zp;
+    STARTUP:    load = ROM,             type = ro,  define = yes;
+    CODE:       load = ROM,             type = ro,  define = yes;
+    RODATA:     load = ROM,             type = ro,  define = yes, align = 256;
+    DATA:       load = ROM, run = RAM1, type = rw,  define = yes;
+    BSS:        load = RAM1,            type = bss, define = yes;
+    VECTORS:    load = ROM,             type = ro,  define = yes;
+    ENCRYPTION: load = ROME,            type = ro   define = yes;
+}
+
+FEATURES {
+    CONDES: type    = constructor,
+            label   = __CONSTRUCTOR_TABLE__,
+            count   = __CONSTRUCTOR_COUNT__,
+            segment = ONCE;
+    CONDES: type    = destructor,
+            label   = __DESTRUCTOR_TABLE__,
+            count   = __DESTRUCTOR_COUNT__,
+            segment = RODATA;
+    CONDES: type    = interruptor,
+            label   = __INTERRUPTOR_TABLE__,
+            count   = __INTERRUPTOR_COUNT__,
+            segment = RODATA,
+            import  = __CALLIRQ__;
+}