diff --git a/src/devices/machine/pla.cpp b/src/devices/machine/pla.cpp
index 44db6a4ed10..463ccc334cc 100644
--- a/src/devices/machine/pla.cpp
+++ b/src/devices/machine/pla.cpp
@@ -12,9 +12,11 @@
 #include "plaparse.h"
 
 #define LOG_TERMS (1 << 0U)
-//#define VERBOSE (LOG_TERMS)
-#include "logmacro.h"
 
+//#define VERBOSE (LOG_TERMS)
+//#define LOG_OUTPUT_STREAM std::cout
+
+#include "logmacro.h"
 
 DEFINE_DEVICE_TYPE(PLA, pla_device, "pla", "PLA")
 DEFINE_DEVICE_TYPE(PLS100, pls100_device, "pls100", "82S100-series PLA")
@@ -123,6 +125,8 @@ void pla_device::parse_fusemap()
 		return;
 	}
 
+	LOGMASKED(LOG_TERMS, "PLA read and parsed, %d fuses in %s format\n", jed.numfuses, jed.binfmt == MAXLOADER ? "Maxloader" : "DataIO" );
+
 	// parse it
 	uint32_t fusenum = 0;
 
@@ -135,11 +139,21 @@ void pla_device::parse_fusemap()
 
 		for (int i = 0; i < m_inputs; i++)
 		{
-			// complement
-			term->and_mask |= (uint64_t)jed_get_fuse(&jed, fusenum++) << (i + 32);
-
-			// true
-			term->and_mask |= (uint64_t)jed_get_fuse(&jed, fusenum++) << i;
+			if (jed.binfmt == MAXLOADER)
+			{
+				term->and_mask |= (uint64_t)jed_get_fuse(&jed, fusenum++) << (i + 32); // complement
+				term->and_mask |= (uint64_t)jed_get_fuse(&jed, fusenum++) << i;        // true
+			}
+			else if (jed.binfmt == DATAIO)
+			{
+				term->and_mask |= (uint64_t)jed_get_fuse(&jed, fusenum++) << i;        // true
+				term->and_mask |= (uint64_t)jed_get_fuse(&jed, fusenum++) << (i + 32); // complement
+			}
+			else
+			{
+				logerror("PLA parser: Unknown JED format\n");
+				break;
+			}
 		}
 
 		// OR mask
diff --git a/src/lib/util/jedparse.cpp b/src/lib/util/jedparse.cpp
index c2c9a139a6a..f7b252861a2 100644
--- a/src/lib/util/jedparse.cpp
+++ b/src/lib/util/jedparse.cpp
@@ -391,9 +391,24 @@ int jedbin_parse(const void *data, size_t length, jed_data *result)
 	/* first unpack the number of fuses */
 	result->numfuses = (cursrc[0] << 24) | (cursrc[1] << 16) | (cursrc[2] << 8) | cursrc[3];
 	cursrc += 4;
+
 	if (result->numfuses == 0 || result->numfuses > JED_MAX_FUSES)
 		return JEDERR_INVALID_DATA;
 
+	/* Detect DataIO binary format and prepare for conversion. This transformation is based on observation of an 82S100 dump */
+	if (result->numfuses == ((cursrc[0] << 24) | (cursrc[1] << 16) | (cursrc[2] << 8) | cursrc[3]))
+	{
+		result->numfuses = (result->numfuses - 9) * 8; // Double 32 bit byte file size header + trailing byte to Single 32 byte fuse count
+		cursrc = cursrc + 4;                           // Adjust start of buffer, trailing byte will not be copied below
+		result->binfmt = DATAIO;                       // DataIO also has swapped inverted/non-inverted line fuses so remember origin
+		if (LOG_PARSE) printf("DATAIO format detected\n");
+	}
+	else
+	{
+		result->binfmt = MAXLOADER;                    // This is the old format just set for completeness.
+		if (LOG_PARSE) printf("MAXLOADER format detected\n");
+	}
+
 	/* now make sure we have enough data in the source */
 	if (length < 4 + (result->numfuses + 7) / 8)
 		return JEDERR_INVALID_DATA;
diff --git a/src/lib/util/jedparse.h b/src/lib/util/jedparse.h
index f12101ca154..6f120abbc8a 100644
--- a/src/lib/util/jedparse.h
+++ b/src/lib/util/jedparse.h
@@ -29,7 +29,10 @@
 #define JEDERR_BAD_XMIT_SUM     2
 #define JEDERR_BAD_FUSE_SUM     3
 
-
+enum fileformats {
+  MAXLOADER,
+  DATAIO
+};
 
 /***************************************************************************
     TYPE DEFINITIONS
@@ -39,6 +42,7 @@ struct jed_data
 {
 	uint32_t      numfuses;           /* number of defined fuses */
 	uint8_t       fusemap[JED_MAX_FUSES / 8];/* array of bit-packed data */
+	fileformats   binfmt; /* file format MAXLOADER or DATAIO */
 };
 
 
diff --git a/src/tools/jedutil.cpp b/src/tools/jedutil.cpp
index d1c49ec7a79..8fcc650c1d7 100644
--- a/src/tools/jedutil.cpp
+++ b/src/tools/jedutil.cpp
@@ -7429,9 +7429,19 @@ static int command_convert(int argc, char *argv[])
 
 		/* read the binary data */
 		err = jedbin_parse(srcbuf, srcbuflen, &jed);
-		switch (err)
+
+		if (err == JEDERR_INVALID_DATA)
 		{
-			case JEDERR_INVALID_DATA:   fprintf(stderr, "Fatal error: Invalid binary JEDEC file\n"); free(srcbuf); return 1;
+			fprintf(stderr, "Fatal error: Invalid binary JEDEC file\n");
+			free(srcbuf);
+			return 1;
+		}
+
+		if (jed.binfmt == DATAIO) // DATAIO is detected and not supported yet, it has swapped inverted/non-inverted line fuses
+		{
+			fprintf(stderr, "Fatal error: Unsupported DATAIO PLA format detected\n");
+			free(srcbuf);
+			return 1;
 		}
 
 		/* print out data */