From 5eab2aecdd2682712ba763e4c6d613be52e174ae Mon Sep 17 00:00:00 2001
From: viciious <vluchits@gmail.com>
Date: Sun, 5 Nov 2023 23:22:23 +0300
Subject: [PATCH] Code refactoring

---
 marshw.c      |  9 +++++++++
 marshw.h      |  3 +++
 p_setup.c     |  6 +-----
 src-md/crt0.s | 21 ++++++++++-----------
 4 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/marshw.c b/marshw.c
index 83a08fd0a..c0304e53c 100644
--- a/marshw.c
+++ b/marshw.c
@@ -449,6 +449,15 @@ void Mars_MCDFlushSfx(void)
 	while (MARS_SYS_COMM0);
 }
 
+void Mars_CopyLLongs(int numllongs)
+{
+	/* transfer nodes to the MD */
+	while (MARS_SYS_COMM0);
+	MARS_SYS_COMM2 = numllongs;
+	MARS_SYS_COMM0 = 0x2400;
+	while (MARS_SYS_COMM0);
+}
+
 void Mars_StopTrack(void)
 {
 	while (MARS_SYS_COMM0);
diff --git a/marshw.h b/marshw.h
index e0770dabb..99f4c8446 100644
--- a/marshw.h
+++ b/marshw.h
@@ -153,6 +153,9 @@ void Mars_MCDStopSfx(uint8_t src_id);
 void Mars_MCDFlushSfx(void);
 void Mars_MCDLoadSfxFileOfs(uint16_t start_id, int numsfx, const char *name, int *offsetlen);
 
+// copies numllongs number of 64-bit values from the framebufer into MD RAM
+void Mars_CopyLLongs(int numllongs);
+
 void Mars_MCDSetFileCache(int length);
 void *Mars_MCDGetFileCache(int length);
 
diff --git a/p_setup.c b/p_setup.c
index 12fea9bf3..04702a66b 100644
--- a/p_setup.c
+++ b/p_setup.c
@@ -243,11 +243,7 @@ void P_LoadNodes (int lump)
 	}
 
 #ifdef MARS
-	/* transfer nodes to the MD */
-	while (MARS_SYS_COMM0);
-	MARS_SYS_COMM2 = numnodes;
-	MARS_SYS_COMM0 = 0x2400;
-	while (MARS_SYS_COMM0);
+	Mars_CopyLLongs(numnodes * 2);
 #endif
 }
 
diff --git a/src-md/crt0.s b/src-md/crt0.s
index c0cf133f0..996650465 100644
--- a/src-md/crt0.s
+++ b/src-md/crt0.s
@@ -474,8 +474,8 @@ no_cmd:
         dc.w    update_sfx - prireqtbl
         dc.w    stop_sfx - prireqtbl
         dc.w    flush_sfx - prireqtbl
-        dc.w    test_handle - prireqtbl
-        dc.w    get_bbox - prireqtbl
+        dc.w    copy_llongs - prireqtbl
+        dc.w    get_llong - prireqtbl
         dc.w    open_cd_file_by_name - prireqtbl
         dc.w    open_cd_file_by_handle - prireqtbl
         dc.w    read_cd_file - prireqtbl
@@ -2055,27 +2055,26 @@ flush_sfx:
         move.b  #1,need_bump_fm
         bra     main_loop
 
-test_handle:
+copy_llongs:
         moveq   #0,d1
-        move.w  0xA15122,d1         /* number of nodes */
+        move.w  0xA15122,d1         /* number of llongs */
         add.w   d1,d1               /* x2 */
         add.w   d1,d1               /* x4 */
         add.w   d1,d1               /* x8 */
-        add.w   d1,d1               /* x16 */
 
-        lea     MARS_FRAMEBUFFER,a2         /* frame buffer */
+        lea     MARS_FRAMEBUFFER,a2
         lea     nodes_store,a1
         
         move.l  d1,-(sp)            /* length */
         move.l  a2,-(sp)            /* framebuffer */
         move.l  a1,-(sp)            /* destination */
 
-        move.w  0xA15100,d1
-        eor.w   #0x8000,d1
-        move.w  d1,0xA15100         /* unset FM - disallow SH2 access to FB */
+        move.w  0xA15100,d0
+        eor.w   #0x8000,d0
+        move.w  d0,0xA15100         /* unset FM - disallow SH2 access to FB */
 
         jsr     memcpy
-        lea     12(sp),sp            /* clear the stack */
+        lea     12(sp),sp           /* clear the stack */
 
         move.w  0xA15100,d0
         or.w    #0x8000,d0
@@ -2084,7 +2083,7 @@ test_handle:
         move.w  #0,0xA15120         /* done */
         bra     main_loop
 
-get_bbox:
+get_llong:
         move.w  0xA15122,d1         /* offset */
 
         lea     nodes_store,a1