fix title screen breakage

4 files changed, 16 insertions, 8 deletions

diff --git a/bigfloat.s b/bigfloat.s
index 5acbecf..d3115bc 100644
--- a/bigfloat.s
+++ b/bigfloat.s
@@ -16,6 +16,8 @@
  ; atari.inc also has a typo, PLD1P for FLD1P
  FLD1P = PLD1P
 
+ ;bfstart = *
+
  .rodata
 BIG_64K: ; 65535 (2**16-1) in float format.
  .byte $42, $06, $55, $36, $00, $00
@@ -369,3 +371,4 @@ _big_cmp:
  tax      ; sign extension, grr.
  rts
 
+ ;.out .sprintf("bigfloat.s code is %d bytes", *-bfstart)
diff --git a/checkmem.s b/checkmem.s
index 9994add..a539e4b 100644
--- a/checkmem.s
+++ b/checkmem.s
@@ -101,11 +101,11 @@ gr_0:
  ; save display list pointer where taipan.c's main() can find it.
  ; this is done ASAP after the CIO call, to avoid saving the DL
  ; after SpartaDOS's TDLINE has had a chance to modify it.
- ; we use FR1 because the menu code in newtitle.s trashes FR0.
+ ; we use FRE because the menu code in newtitle.s trashes FR0 and FR1.
  lda SDLSTL
- sta FR1
+ sta FRE
  lda SDLSTH
- sta FR1+1
+ sta FRE+1
 
  rts
 
diff --git a/newtitle.s b/newtitle.s
index 6bc0b4a..a2c8559 100644
--- a/newtitle.s
+++ b/newtitle.s
@@ -285,11 +285,16 @@ start:
  ; still needs to be done here for the cart.
  .ifdef CART_TARGET
  lda SDLSTL
- sta FR1
+ sta FRE
  lda SDLSTH
- sta FR1+1
+ sta FRE+1
  .endif
 
+ ; helpshowing is FR1, it's being messed with by the checkmem
+ ; code so we need to initialize it.
+ lda #0
+ sta helpshowing
+
  ; setup our display list
  lda #<dlist
  sta SDLSTL
diff --git a/taipan.c b/taipan.c
index 1f5c468..1371fd1 100644
--- a/taipan.c
+++ b/taipan.c
@@ -3345,12 +3345,12 @@ hangx: goto hangx;
 int main(void) {
    char choice;
 
-	/* newtitle.s saves the OS's display list pointer in FR0,
+	/* newtitle.s saves the OS's display list pointer in FRE,
 		sets up its own DL, and uses narrow playfield mode. First
 		thing we do it put things back the way they were.
 		FONT_ADDR is set on the command line (see the Makefile). */
-	POKE(560, PEEK(0xe0)); // restore the
-	POKE(561, PEEK(0xe1)); // display list
+	POKE(560, PEEK(0xda)); // restore the
+	POKE(561, PEEK(0xdb)); // display list
 	POKE(756, FONT_ADDR / 256); // use our custom font
 	POKE(731, 1);    // disable keyclick on XL/XE (does nothing on 400/800)
 	POKE(559, 34);        // turn on the screen (normal playfield)