this probably works

more magic to fix crashes!

src/cesium.asm

@@ -27,7 +27,7 @@
 ; POSSIBILITY OF SUCH DAMAGE.
 
 cesium_name := 'Cesium'
-cesium_version := '3.5.1'
+cesium_version := '3.6.0'
 cesium_copyright := '(C)  2015-2021 Matt Waltz'
 
 include 'include/macros.inc'

src/ports.asm

@@ -26,89 +26,65 @@
 ; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 ; POSSIBILITY OF SUCH DAMAGE.
 
-os_num = 0
-
-macro ports? v, lock, unlock
-	match major.mid.minor.build, v
-    		db major, mid, minor
-		dl build
-	end match
-	dl	lock
-	dl	unlock
-	os_num = os_num + 1
-end macro
-
-os_table:
-	ports	5.6.1.0012, port_os560.lock, port_os561.unlock
-	ports	5.6.0.0020, port_os560.lock, port_os560.unlock
-	ports	5.5.5.0011, port_os560.lock, port_os555.unlock
-	ports	5.5.2.0044, port_os560.lock, port_os552.unlock
-	ports	5.5.1.0038, port_os560.lock, port_os551.unlock
-
 port_setup:
 	di
-	call    $21ED4
+	ld	b,1
+	or	a,a
+	sbc	hl,hl
+.find:
+	ld	a,(hl)
+	inc	hl
+	cp	a,$80
+	jq	z,.found_80
+	cp	a,$ed
+	jq	nz,.find
+	ld	a,(hl)
+	sub	a,$41
+	jq	z,.found_ed41
+	cp	a,$73
+	jq	nz,.find
+	dec	b
+	dec	hl
+	ld	(port_new.target),hl
+	inc	hl
+	jq	.find
+.found_80:
+	ld	a,(hl)
+	cp	a,$0f
+	jq	nz,.find
+	and	a,b
+	ret	nz
+	ld	hl,port_new.unlock
+	jq	.store_smc
+.found_ed41:
+	dec	hl
+	ld	(port_old.target),hl
+	inc	hl
 	push	hl
 	pop	ix
-	lea	de,ix + 6
-	ld	a,(de)
-	cp	a,5
-	jq	nz,.invalid_os
-	inc	de
-	ld	a,(de)
-	cp	a,5
-	jq	c,.ospre55
-	dec	de
-	ld	b,os_num
-	ld	ix,os_table
-.find:
-	lea	hl,ix
-	push	de,bc
-	ld	b,6
-	call	ti.StrCmpre
-	pop	bc,de
-	jq	z,.found
-	lea	ix,ix + 12
-	djnz	.find
-.invalid_os:
-	inc	a
-	ret
-.found:
-	ld	de,(ix + 6)
-	ld	hl,(ix + 9)
+	bit	0,(ix+4)
+	jq	nz,.find
+	ld	hl,port_old.unlock
 .store_smc:
 	ld	(port_unlock.code),hl
-	ld	(port_lock.code),de
-	xor	a,a
 	ret
-.ospre55:
-	ld	hl,port_ospre55.unlock
-	ld	de,port_ospre55.lock
-	jq	.store_smc
 
-port_ospre55:
+port_old:
 .unlock:
-	ld	bc,$24
+	call	.unlockhelper
+.unlockfinish:
 	ld	a,$8c
-	call	.write
-	ld	bc,$06
-	call	.read
+	out0	($24),a
+	in0	a,($06)
 	or	a,4
-	call	.write
-	ld	bc,$28
-	ld	a,$4
-	jq	.write
-.lock:
-	ld	bc,$28
-	xor	a,a
-	call	.write
-	ld	bc,$06
-	call	.read
-	res	2,a
-	call	.write
-	ld	bc,$24
-	ld	a,$88
-	jq	.write
+	out0	($06),a
+	ret
+.unlockhelper:
+	call	ti._frameset0
+	push	de
+	ld	bc,$0022
+	jp	0
+.target := $-3
 .write:
 	ld	de,$c979ed
 	ld	hl,ti.heapBot - 3
@@ -120,59 +96,34 @@ port_ospre55:
 	ld	(hl),de
 	jp	(hl)
 
-port_os555:
+port_new:
 .unlock:
-	ld	ix,$b96df
-	jq	port_os560.unlock0
-
-port_os552:
-.unlock:
-	ld	ix,$bd573
-	jq	port_os560.unlock0
-
-port_os551:
-.unlock:
-	ld	ix,$bd55f
-	jq	port_os560.unlock0
-
-port_os561:
-.unlock:
-	ld	ix,$4a5ac
-	ld	hl,port_os560.unlockhelper
-	push	hl
+	ld	de,$d19881
+	push	de
+	or	a,a
+	sbc	hl,hl
 	push	hl
-	ld	de,ti.flags
+	ld	de,$03d1
 	push	de
-	ld	bc,$22
-	ld	a,(ix)
-	cp	a,$ed
-	jr	z,.84
-.83:
-	ld	ixl,$8f
-.84:
-	xor	a,a
-	jp	(ix)
-
-port_os560:
-.unlock:
-	ld	ix,$b99bb
-.unlock0:
-	ld	hl,.unlockhelper
 	push	hl
-	ld	hl,$d09466
+	call	.unlockhelper
+	ld	hl,12
+	add	hl,sp
+	ld	sp,hl
+	jq	port_old.unlockfinish
+.unlockhelper:
+	push	hl
+	ex	(sp),ix
+	add	ix,sp
 	push	hl
 	push	de
-	xor	a,a
-	jp	(ix)
-.unlockhelper:
-	ld	a,$8c
-	out0	($24),a
-	in0	a,($06)
-	or	a,$04
-	out0	($06),a
-	ld	a,$04
-	out0	($28),a
-	ret
+	ld	de,$887c00
+	push	de
+	ld	bc,$10de
+	ld	de,$0f22
+	add	hl,sp
+	jp	0
+.target := $-3
 .lock:
 	xor	a,a
 	out0	($28),a
@@ -187,12 +138,12 @@ port_os560:
 
 port_read:
 	push	de,bc,hl
-	call	port_ospre55.read
+	call	port_old.read
 	jq	port_lock.pop
 
 port_write:
 	push	de,bc,hl
-	call	port_ospre55.write
+	call	port_old.write
 	jq	port_lock.pop
 
 port_unlock:
@@ -203,8 +154,7 @@ port_unlock:
 
 port_lock:
 	push	de,bc,hl
-	call	0
-.code := $-3
+	call	port_new.lock
 .pop:
 	pop	hl,bc,de
 	ret