From eb824765918b7c54b08a700f5123092cfcae3fc8 Mon Sep 17 00:00:00 2001
From: ISSOtm <eldredhabert0@gmail.com>
Date: Fri, 10 Jan 2020 14:57:39 +0100
Subject: [PATCH] Make bank of "bank 0" sections known to RGBASM This allows
 `BANK("Some ROM0 section")` to be used in a constant expression

---
 src/asm/output.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/asm/output.c b/src/asm/output.c
index c319a153..ca82446f 100644
--- a/src/asm/output.c
+++ b/src/asm/output.c
@@ -639,6 +639,15 @@ struct Section *out_FindSection(char *pzName, uint32_t secttype, int32_t org,
 	if (pSect->pzName == NULL)
 		fatalerror("Not enough memory for sectionname");
 
+	// Force the bank to be 0 if that's the only possibility
+	switch (secttype) {
+	case SECTTYPE_ROM0:
+	case SECTTYPE_WRAM0:
+	case SECTTYPE_OAM:
+	case SECTTYPE_HRAM:
+		bank = 0;
+	}
+
 	pSect->nType = secttype;
 	pSect->nPC = 0;
 	pSect->nOrg = org;