Add OPL4 playback and analyzer support

2026-09-15 14:59:29 +03:00
commit 1686838e03
553 changed files with 50524 additions and 0 deletions
@@ -0,0 +1,25 @@
+        .module wc_gadrw
+        .area _CODE
+WC_ENTRY = 0x6006
+        .globl _wc_gadrw
+_wc_gadrw::
+        push    ix
+        push    hl                      ; save win (HL = 1st arg)
+        ld      ix, #0
+        add     ix, sp
+        ld      d, 6(ix)                ; D = y
+        ld      e, 7(ix)                ; E = x
+        ld      l, 0(ix)
+        ld      h, 1(ix)                ; HL = win
+        push    hl
+        pop     ix                      ; IX = win
+        ld      a, #0x05
+        call    WC_ENTRY                ; HL = result addr
+        ex      de, hl                  ; DE = result (sdcccall(1) uint16)
+        pop     hl                      ; remove saved win (use HL, keep DE)
+        pop     ix                      ; restore caller IX
+        ; callee cleans 2 bytes (y+x); preserve DE = return value
+        pop     hl                      ; HL = return address
+        inc     sp
+        inc     sp                      ; discard y(1)+x(1)
+        jp      (hl)                    ; return, DE = result