From 93ef1dd31d7d267c0a16a5b40f3b6cf0b66678ce Mon Sep 17 00:00:00 2001
From: Alan Cox <etchedpixels@gmail.com>
Date: Fri, 28 Jun 2024 14:38:20 +0100
Subject: [PATCH] sbcv2: fix IY corruption

---
 Kernel/platform/platform-sbcv2/tricks.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Kernel/platform/platform-sbcv2/tricks.S b/Kernel/platform/platform-sbcv2/tricks.S
index 3c8145a40c..7d5480269f 100644
--- a/Kernel/platform/platform-sbcv2/tricks.S
+++ b/Kernel/platform/platform-sbcv2/tricks.S
@@ -47,6 +47,8 @@
 ;	if your platform has an NMI to handle.
 ;
 bankfork:
+	push ix
+	push iy
 	dec a			; offset by 1 from hardware (see map_*)
 	dec c			; likewise
 	ld (cpatch0 + 1),a	; patch parent into loop
@@ -114,6 +116,8 @@ copy_over:
 	;	Get the stack back
 	;
 	ld sp,(spcache)
+	pop iy
+	pop ix
 	;
 	;	And the correct kernel bank.
 	;