From: Lukas Krickl <lukas@krickl.dev>
Date: Sat, 24 May 2025 15:29:59 +0000 (+0200)
Subject: sys: Added farcall sys call
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=655c16d46fbe185e97694f903c6e9ee0935da15a;p=gbrg%2F.git

sys: Added farcall sys call
---

diff --git a/src/jmp.inc b/src/jmp.inc
index aa09be9..b5eaead 100644
--- a/src/jmp.inc
+++ b/src/jmp.inc
@@ -8,10 +8,25 @@ rst_panic:
 
   ; rst 0008
   ; simple call to hl
-call_hl:
+sys_call_hl:
   jp hl
-.fill 0, 0x40 - $ 
 
+.fill 0, 0x10 - $
+  
+  ; rst 0010
+  ; farcall
+  ; inputs: 
+  ;   a: bank
+  ;   hl: routine ptr
+sys_farcall:
+  ; TODO: save current bank
+  ; TODO: switch bank
+  call_hl
+  ; TODO: switch bank
+  ret
+  
+
+.fill 0, 0x40 - $ 
 ; interrupt vectors
 
 ;=============
diff --git a/src/macros.inc b/src/macros.inc
index 978698a..d3be0a3 100644
--- a/src/macros.inc
+++ b/src/macros.inc
@@ -241,3 +241,8 @@
 #macro call_hl
   rst 0x08 
 #endmacro
+
+  ; calls rst 0x10
+#macro farcall
+  rst 0x10
+#endmacro