From: Alan Cox <alan@linux.intel.com>
Date: Sat, 2 Jun 2018 21:56:34 +0000 (+0100)
Subject: trs80: add bank helper for fast bank to bank copies
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=0956d6d89bbf09e0712fba0d2816b374099decbc;p=FUZIX.git

trs80: add bank helper for fast bank to bank copies
---

diff --git a/Kernel/platform-trs80m1/trs80-bank.s b/Kernel/platform-trs80m1/trs80-bank.s
index 2691bd49..6cdb8c99 100644
--- a/Kernel/platform-trs80m1/trs80-bank.s
+++ b/Kernel/platform-trs80m1/trs80-bank.s
@@ -16,6 +16,7 @@
 	    .globl map_restore
 	    .globl map_save_kmap
 	    .globl map_restore_kmap
+	    .globl fork_mapsave
 
             ; imported symbols
 	    .globl _program_vectors	
@@ -103,6 +104,11 @@ map_kernel_restore:
 	    out (0x43), a
 	    pop af
 	    ret
+
+fork_mapsave:
+	    ld a,(map_reg)
+	    ld (ksave_map),a
+	    ret
 ;
 ;	Select the bank for the relevant process. Update the ksave_map so we
 ;	can restore the correct kernel mapping when banked.