From 45c9dc23612600f6156009e2e9c0039a61b64ea2 Mon Sep 17 00:00:00 2001 From: ggn Date: Tue, 20 Dec 2022 23:48:39 +0200 Subject: [PATCH] Added support for C64 .PRG output format (#194) --- 6502.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) 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]); +} -- 2.37.2