From 4e91e1e52d21d99ca6e2465e89676b6daf242310 Mon Sep 17 00:00:00 2001
From: zerico <71151164+ZERICO2005@users.noreply.github.com>
Date: Wed, 4 Mar 2026 13:58:19 -0700
Subject: [PATCH 1/5] format unconditional jumps in crt0.S

---
 src/crt/crt0.S | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/crt/crt0.S b/src/crt/crt0.S
index 3a7112997..1bf8533a6 100644
--- a/src/crt/crt0.S
+++ b/src/crt/crt0.S
@@ -96,6 +96,7 @@ __start:
 	ldir
 	ld	a, ti.kClear
 	jp	ti.JForceCmd
+
 	.local	___app_start
 ___app_start:
 #else
@@ -132,6 +133,7 @@ __start:
 #if HAS_LIBLOAD
 	call	ti.PushRealO1			; save running program name
 	jr	.L.tryfind
+
 .L.inram:
 	call	ti.Arc_Unarc
 .L.tryfind:
@@ -150,6 +152,7 @@ __start:
 	pop	hl				; start of loader (required to be in hl)
 	ld	de, ___libload_libs		; start of relocation data
 	jp	(hl)				; jump to the loader -- it should take care of everything else
+
 .L.notfound:
 	call	ti.PopRealO1			; restore running program name
 	call	ti.ClrScrn
@@ -217,6 +220,7 @@ ___libload_libs_ret:
 	inc	hl
 	ld	b, (hl)
 	jr	.L.parse_ans_next
+
 .L.parse_ans_loop:
 	inc	hl
 	dec	bc
@@ -295,6 +299,7 @@ ___libload_libs_ret:
 #if HAS_INIT_ARRAY
 	ld	hl, __init_array_start
 	jr	.L.init_array_start
+
 .L.init_array_loop:
 	push	hl
 	ld	hl, (hl)
@@ -331,6 +336,7 @@ ___exithl:
 _exit:
 #if HAS_ATEXIT
 	jr	.L.exit_function_start
+
 .L.exit_function_loop:
 	ld	hl, (ix + 1 + 0 * 3)
 	ld	(__atexit_functions), hl
@@ -357,6 +363,7 @@ _exit:
 #if HAS_FINI_ARRAY
 	ld	hl, __fini_array_end
 	jr	.L.fini_array_start
+
 .L.fini_array_loop:
 	dec	hl
 	dec	hl
@@ -381,6 +388,7 @@ _exit:
 #endif
 #if HAS_ABORT
 	jr	.L.skip._abort
+
 	.global	_abort
 	.type	_abort, @function
 _abort:

From ed8f3bc43586c372355113f9c3bcca6a0df9a0d7 Mon Sep 17 00:00:00 2001
From: zerico <71151164+ZERICO2005@users.noreply.github.com>
Date: Wed, 4 Mar 2026 14:00:13 -0700
Subject: [PATCH 2/5] optimized skip._abort

---
 src/crt/crt0.S | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/crt/crt0.S b/src/crt/crt0.S
index 1bf8533a6..b77530de7 100644
--- a/src/crt/crt0.S
+++ b/src/crt/crt0.S
@@ -387,7 +387,8 @@ _exit:
 	pop	hl
 #endif
 #if HAS_ABORT
-	jr	.L.skip._abort
+	; jr	.L.skip._abort
+	db	$FD				; ld	iy, *
 
 	.global	_abort
 	.type	_abort, @function

From 76e13f3a36e2d9efae69327cfc3a5868081e2ce1 Mon Sep 17 00:00:00 2001
From: zerico <71151164+ZERICO2005@users.noreply.github.com>
Date: Wed, 4 Mar 2026 14:01:22 -0700
Subject: [PATCH 3/5] remove unneeded or a, a

---
 src/crt/crt0.S | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/crt/crt0.S b/src/crt/crt0.S
index b77530de7..ce7abb6bd 100644
--- a/src/crt/crt0.S
+++ b/src/crt/crt0.S
@@ -71,7 +71,6 @@ __start:
 	ld	sp, (ti.onSP)			; reset stacks
 	call	ti.ResetStacks
 	ld	bc, ___data_len
-	or	a, a
 	sbc	hl, hl
 	adc	hl, bc
 	jr	z, .L.skip_data_copy

From 540ec027522b20862e4e28ff9e1cfae19ee9da7e Mon Sep 17 00:00:00 2001
From: zerico <71151164+ZERICO2005@users.noreply.github.com>
Date: Wed, 4 Mar 2026 14:30:54 -0700
Subject: [PATCH 4/5] optimized clock zeroize

---
 src/crt/crt0.S | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/crt/crt0.S b/src/crt/crt0.S
index ce7abb6bd..e6feb75e5 100644
--- a/src/crt/crt0.S
+++ b/src/crt/crt0.S
@@ -286,11 +286,16 @@ ___libload_libs_ret:
 	res	ti.bTmr1Enable, (hl)
 	set	ti.bTmr1Crystal, (hl)
 	res	ti.bTmr1Overflow, (hl)
-	ld	l, (ti.mpTmr1Counter + 1) & 0xFF
-	ld	de, 0				; Set the counter to zero
-	ld	(hl), de
-	dec	hl
-	ld	(hl), e
+
+	; Set the counter to zero
+	.errif	(ti.mpTmr1Counter & 0xFFFF) != 0
+	ld	l, h				; ld hl, ti.mpTmr1Counter
+	ld	b, 4
+.L.zeroize_counter:
+	ld	(hl), h
+	inc	hl
+	djnz	.L.zeroize_counter
+
 	ld	l, ti.mpTmrCtrl & 0xFF
 	set	ti.bTmr1Enable, (hl)		; Enable the timer
 #endif

From 581c3df072f3c6b6e0cc4144737c3d23cac20919 Mon Sep 17 00:00:00 2001
From: zerico <71151164+ZERICO2005@users.noreply.github.com>
Date: Wed, 4 Mar 2026 15:23:58 -0700
Subject: [PATCH 5/5] use the pointer as the loop counter

---
 src/crt/crt0.S | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/crt/crt0.S b/src/crt/crt0.S
index e6feb75e5..9589412d0 100644
--- a/src/crt/crt0.S
+++ b/src/crt/crt0.S
@@ -289,12 +289,11 @@ ___libload_libs_ret:
 
 	; Set the counter to zero
 	.errif	(ti.mpTmr1Counter & 0xFFFF) != 0
-	ld	l, h				; ld hl, ti.mpTmr1Counter
-	ld	b, 4
+	ld	l, (ti.mpTmr1Counter + 4) & 0xFF
 .L.zeroize_counter:
+	dec	l
 	ld	(hl), h
-	inc	hl
-	djnz	.L.zeroize_counter
+	jr	nz, .L.zeroize_counter
 
 	ld	l, ti.mpTmrCtrl & 0xFF
 	set	ti.bTmr1Enable, (hl)		; Enable the timer