hbios - temp stack tweak

Source/HBIOS/hbios.asm

@@ -179,7 +179,7 @@ ROM_SIG:
 ;
 NAME	.DB	"ROMWBW v", BIOSVER, ", ", TIMESTAMP, 0
 AUTH	.DB	"WBW",0
-DESC	.DB	"ROMWBW v", BIOSVER, ", Copyright (C) 2019, Wayne Warthen, GNU GPL v3", 0
+DESC	.DB	"ROMWBW v", BIOSVER, ", Copyright (C) 2020, Wayne Warthen, GNU GPL v3", 0
 ;
 	.FILL	($100 - $),$FF		; PAD REMAINDER OF PAGE ZERO
 ;
@@ -285,10 +285,11 @@ HBX_INVOKE:
 #ENDIF
 
 	LD	(HBX_INVSP),SP		; SAVE ORIGINAL STACK FRAME
+	LD	SP,HBX_BUF_END		; BORROW HBX_BUF FOR TEMP STACK
+
 	LD	A,(HB_CURBNK)		; GET CURRENT BANK
 	LD	(HB_INVBNK),A		; SAVE INVOCATION BANK
 
-	LD	SP,HBX_BUF_END		; BORROW HBX_BUF FOR TEMP STACK
 	LD	A,BID_BIOS		; HBIOS BANK
 	CALL	HBX_BNKSEL		; SELECT IT
 	LD	SP,HB_STACK		; NOW USE FULL HBIOS STACK IN HBIOS BANK