diff --git a/flashchips.c b/flashchips.c
index 05eb5b3..a6db11e 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -9551,6 +9551,44 @@
 
 	{
 		.vendor		= "SST",
+		.name		= "SST25VF512A",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST25VF512A_REMS,
+		.total_size	= 64,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_EWSR,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rems,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 16} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_sst25, /* FIXME: No BP2 & 3 */
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_chip_write_1, /* AAI supported, but opcode is 0xAF */
+		.read		= spi_chip_read, /* Fast read (0x0B) supported */
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
 		.name		= "SST25VF010",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= SST_ID,
@@ -9570,13 +9608,235 @@
 				.eraseblocks = { {32 * 1024, 4} },
 				.block_erase = spi_block_erase_52,
 			}, {
+				.eraseblocks = { {32 * 1024, 4} },
+				.block_erase = spi_block_erase_d8,
+			}, {
 				.eraseblocks = { {128 * 1024, 1} },
 				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_sst25, /* FIXME: No BP2 & 3 */
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_chip_write_1, /* AAI supported, but opcode is 0xAF */
+		.read		= spi_chip_read, /* Fast read (0x0B) supported */
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
+		.name		= "SST25VF020",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST25VF020_REMS,
+		.total_size	= 256,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_EWSR,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rems,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 64} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 8} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_sst25, /* FIXME: No BP2 & 3 */
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_chip_write_1, /* AAI supported, but opcode is 0xAF */
+		.read		= spi_chip_read, /* only */
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
+		.name		= "SST25VF020B",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST25VF020B,
+		.total_size	= 256,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_EWSR,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 64} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 8} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 4} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_sst25, /* FIXME: No BP2 & 3 and 2nd SR */
+		.unlock		= spi_disable_blockprotect, /* FIXME: 2nd SR */
+		.write		= spi_aai_write, /* AAI supported (0xAD) */
+		.read		= spi_chip_read, /* Fast read (0x0B) supported */
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
+		.name		= "SST25VF040",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST25VF040_REMS,
+		.total_size	= 512,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_EWSR,
+		.tested		= TEST_OK_PR,
+		.probe		= probe_spi_rems,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 128} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 16} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
 			},
 		},
 		.printlock	= spi_prettyprint_status_register_sst25, /* TODO: check */
 		.unlock		= spi_disable_blockprotect,
-		.write		= spi_chip_write_1,
+		.write		= spi_chip_write_1, /* AAI supported, but opcode is 0xAF */
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
+		.name		= "SST25VF040B",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST25VF040B,
+		.total_size	= 512,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_EWSR,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 128} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 16} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_sst25vf040b,
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_aai_write, /* AAI supported (0xAD) */
+		.read		= spi_chip_read, /* Fast read (0x0B) supported */
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
+		.name		= "SST25VF040B.REMS",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST25VF040B_REMS,
+		.total_size	= 512,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_EWSR,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rems,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 128} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 16} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_sst25vf040b,
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_aai_write,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
+		.name		= "SST25VF080B",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST25VF080B,
+		.total_size	= 1024,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_EWSR,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 256} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 32} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 16} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_sst25, /* TODO: check */
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_aai_write,
 		.read		= spi_chip_read,
 		.voltage	= {2700, 3600},
 	},
@@ -9697,152 +9957,6 @@
 
 	{
 		.vendor		= "SST",
-		.name		= "SST25VF040",
-		.bustype	= BUS_SPI,
-		.manufacture_id	= SST_ID,
-		.model_id	= SST_SST25VF040_REMS,
-		.total_size	= 512,
-		.page_size	= 256,
-		.feature_bits	= FEATURE_WRSR_EWSR,
-		.tested		= TEST_OK_PR,
-		.probe		= probe_spi_rems,
-		.probe_timing	= TIMING_ZERO,
-		.block_erasers	=
-		{
-			{
-				.eraseblocks = { {4 * 1024, 128} },
-				.block_erase = spi_block_erase_20,
-			}, {
-				.eraseblocks = { {32 * 1024, 16} },
-				.block_erase = spi_block_erase_52,
-			}, {
-				.eraseblocks = { {512 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			},
-		},
-		.printlock	= spi_prettyprint_status_register_sst25, /* TODO: check */
-		.unlock		= spi_disable_blockprotect,
-		.write		= spi_chip_write_1, /* AAI supported, but opcode is 0xAF */
-		.read		= spi_chip_read,
-		.voltage	= {2700, 3600},
-	},
-
-	{
-		.vendor		= "SST",
-		.name		= "SST25VF040B",
-		.bustype	= BUS_SPI,
-		.manufacture_id	= SST_ID,
-		.model_id	= SST_SST25VF040B,
-		.total_size	= 512,
-		.page_size	= 256,
-		.feature_bits	= FEATURE_WRSR_EWSR,
-		.tested		= TEST_OK_PREW,
-		.probe		= probe_spi_rdid,
-		.probe_timing	= TIMING_ZERO,
-		.block_erasers	=
-		{
-			{
-				.eraseblocks = { {4 * 1024, 128} },
-				.block_erase = spi_block_erase_20,
-			}, {
-				.eraseblocks = { {32 * 1024, 16} },
-				.block_erase = spi_block_erase_52,
-			}, {
-				.eraseblocks = { {64 * 1024, 8} },
-				.block_erase = spi_block_erase_d8,
-			}, {
-				.eraseblocks = { {512 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			}, {
-				.eraseblocks = { {512 * 1024, 1} },
-				.block_erase = spi_block_erase_c7,
-			},
-		},
-		.printlock	= spi_prettyprint_status_register_sst25vf040b,
-		.unlock		= spi_disable_blockprotect,
-		.write		= spi_aai_write,
-		.read		= spi_chip_read,
-		.voltage	= {2700, 3600},
-	},
-
-	{
-		.vendor		= "SST",
-		.name		= "SST25VF040B.REMS",
-		.bustype	= BUS_SPI,
-		.manufacture_id	= SST_ID,
-		.model_id	= SST_SST25VF040B_REMS,
-		.total_size	= 512,
-		.page_size	= 256,
-		.feature_bits	= FEATURE_WRSR_EWSR,
-		.tested		= TEST_OK_PREW,
-		.probe		= probe_spi_rems,
-		.probe_timing	= TIMING_ZERO,
-		.block_erasers	=
-		{
-			{
-				.eraseblocks = { {4 * 1024, 128} },
-				.block_erase = spi_block_erase_20,
-			}, {
-				.eraseblocks = { {32 * 1024, 16} },
-				.block_erase = spi_block_erase_52,
-			}, {
-				.eraseblocks = { {64 * 1024, 8} },
-				.block_erase = spi_block_erase_d8,
-			}, {
-				.eraseblocks = { {512 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			}, {
-				.eraseblocks = { {512 * 1024, 1} },
-				.block_erase = spi_block_erase_c7,
-			},
-		},
-		.printlock	= spi_prettyprint_status_register_sst25vf040b,
-		.unlock		= spi_disable_blockprotect,
-		.write		= spi_aai_write,
-		.read		= spi_chip_read,
-		.voltage	= {2700, 3600},
-	},
-
-	{
-		.vendor		= "SST",
-		.name		= "SST25VF080B",
-		.bustype	= BUS_SPI,
-		.manufacture_id	= SST_ID,
-		.model_id	= SST_SST25VF080B,
-		.total_size	= 1024,
-		.page_size	= 256,
-		.feature_bits	= FEATURE_WRSR_EWSR,
-		.tested		= TEST_OK_PREW,
-		.probe		= probe_spi_rdid,
-		.probe_timing	= TIMING_ZERO,
-		.block_erasers	=
-		{
-			{
-				.eraseblocks = { {4 * 1024, 256} },
-				.block_erase = spi_block_erase_20,
-			}, {
-				.eraseblocks = { {32 * 1024, 32} },
-				.block_erase = spi_block_erase_52,
-			}, {
-				.eraseblocks = { {64 * 1024, 16} },
-				.block_erase = spi_block_erase_d8,
-			}, {
-				.eraseblocks = { {1024 * 1024, 1} },
-				.block_erase = spi_block_erase_60,
-			}, {
-				.eraseblocks = { {1024 * 1024, 1} },
-				.block_erase = spi_block_erase_c7,
-			},
-		},
-		.printlock	= spi_prettyprint_status_register_sst25, /* TODO: check */
-		.unlock		= spi_disable_blockprotect,
-		.write		= spi_aai_write,
-		.read		= spi_chip_read,
-		.voltage	= {2700, 3600},
-	},
-
-	{
-		.vendor		= "SST",
 		.name		= "SST25WF512",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= SST_ID,
diff --git a/flashchips.h b/flashchips.h
index cbd3ded..e6e5e8a 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -577,6 +577,7 @@
 #define SST_SST25VF512A_REMS	0x48	/* REMS or RES opcode */
 #define SST_SST25VF010_REMS	0x49	/* REMS or RES opcode */
 #define SST_SST25VF020_REMS	0x43	/* REMS or RES opcode */
+#define SST_SST25VF020B		0x258C
 #define SST_SST25VF040_REMS	0x44	/* REMS or RES opcode, same as SST25LF040A */
 #define SST_SST25VF040B		0x258D
 #define SST_SST25VF040B_REMS	0x8D	/* REMS or RES opcode */