X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/32620_extract/blobdiff_plain/b2130b29087d653cfbab0e1dd81d47b1dbbd37c7..62bca9e0cc06e9fb94755a2812ae8c9cdb4024f5:/extract.c

diff --git a/extract.c b/extract.c
index 7d7c9d1..805be1a 100644
--- a/extract.c
+++ b/extract.c
@@ -62,9 +62,9 @@ int main(int argc, char **argv)
 	 *
 	 * 00000000 01000000 01000011 10110111 01001010 01000011 11000011 01011000
 	 * ^^^^^^^^ ^^^^^^^^ ^^^^^^^^|                          |
-	 * LIIIIIII LIILIIII I????LII
-	 *        I   I    I I      +-- Amplification (Default: 3)
-	 *        I   I    I +--------- Remaining chip select line? (but not quite?)
+	 * LIIIIIII LIILIIII LIIIILII
+	 *        I   I    I     |  +-- Amplification (Default: 3)
+	 *        I   I    I     +----- Chip/Module Select lines/EOF?
 	 *        I   I    +----------- Address (HI Byte)
 	 *        I   +---------------- Chip Select lines A15, A14, A13
 	 *        +-------------------- Address (LO Byte)
@@ -76,24 +76,27 @@ int main(int argc, char **argv)
 		lo = header[i];
 		hi = header[i+1] & 0x1f;
 
-		//!EOF ?!
+		// !EOF ?!
 		if ((header[i+2] & 0xf8) != 0xf8)
-			cs2 = header[i+2] & 0xf8;
+			cs2 = (header[i+2] & 0xf8) >> 3;
 
-		if (cs2 & 0x40) {
-			cs = ((header[i+1] & 0xe0) >> 5) - 2;
-		} else {
-			cs = (((header[i+1] & 0xe0) >> 5) | (1 << 3)) - 4;
-		}
+		cs = ((header[i+1] & 0xe0) >> 5) - 2;
+
+		// second module?
+		if ((cs2 & 0x08) == 0x00)
+			cs += 6; // 6 ROMs per module
 
 		amp = header[i+2] & 0x3;
 
 		adr = ((hi << 8) | lo) + (cs * 8192);
-		if (cs == 0)
+		if (adr == 0)
 			adr += sizeof(header);
 
-		printf("%02d. hi: 0x%02x, lo: 0x%02x, cs: 0x%02x -> adr: 0x%04x; amp: 0x%02x\n",
-		       i/3, hi, lo, cs, adr, amp);
+		printf("%02d. hi: 0x%02x, lo: 0x%02x, cs: 0x%02x, cs2: 0x%02x -> chip: 0x%02x, adr: 0x%04x; amp: 0x%02x\n",
+		       i/3, hi, lo,
+		       ((header[i+1] & 0xe0) >> 5),
+		       ((header[i+2] & 0xf8) >> 3),
+		       cs, adr, amp);
 
 		adrs[i/3] = adr;
 		if ((header[i+2] & 0xf8) == 0xf8)