From: ggn <ggn@atari.org>
Date: Tue, 20 Dec 2022 21:48:39 +0000 (+0200)
Subject: Added support for C64 .PRG output format (#194)
X-Git-Tag: v2.2.11~1
X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=45c9dc23612600f6156009e2e9c0039a61b64ea2;hp=0172b60145f541e4d578bb5aaaff5a9ce0921c8a;p=rmac

Added support for C64 .PRG output format (#194)
---

diff --git a/6502.c b/6502.c
index db6c638..131c6d8 100644
--- a/6502.c
+++ b/6502.c
@@ -569,3 +569,32 @@ void m6502obj(int ofd)
 	}
 }
 
+
+//
+// Generate a C64 .PRG output file
+//
+void m6502c64(int ofd)
+{
+	uint8_t header[2];
+
+	CHUNK * ch = sect[M6502].scode;
+
+	// If no 6502 code was generated, bail out
+	if ((ch == NULL) || (ch->challoc == 0))
+		return;
+
+	if (currentorg != &orgmap[1][0])
+	{
+		// More than one 6502 section created, this is not allowed
+		error("when generating C64 .PRG files only one org section is allowed - aborting");
+		return;
+	}
+
+	SETLE16(header, 0, orgmap[0][0]);
+	register uint8_t * p = ch->chptr;
+
+	// Write header
+	uint32_t unused = write(ofd, header, 2);
+	// Write the data
+	unused = write(ofd, p + orgmap[0][0], orgmap[0][1] - orgmap[0][0]);
+}