Add routine to read from IO space from C.

2023-10-16 22:12:08 +02:00 · 2023-10-16 22:12:08 +02:00 · 828bb38a9a
commit 828bb38a9a
parent 86c3cb709e
1 changed files with 16 additions and 0 deletions
--- a/src/io_a.asm
+++ b/src/io_a.asm
@ -16,3 +16,19 @@ _io_out:

    pop ix
    ret
+
+PUBLIC _io_in
+_io_in:
+    push    ix
+    ld      ix,$0000
+    add     ix,sp
+
+    push    bc
+
+    ld      c,(ix+$04)
+    in      l,(c)
+
+    pop     bc
+
+    pop     ix
+    ret