diff --git a/82802ab.c b/82802ab.c
index 58d3467..db419a7 100644
--- a/82802ab.c
+++ b/82802ab.c
@@ -84,40 +84,40 @@ uint8_t wait_82802ab(chipaddr bios)
 
 	status = chip_readb(bios);
 
 	/* Reset to get a clean state */
 	chip_writeb(0xFF, bios);
 
 	return status;
 }
 
-int erase_82802ab_block(struct flashchip *flash, int offset)
+int erase_82802ab_block(struct flashchip *flash, unsigned int page, unsigned int pagesize)
 {
-	chipaddr bios = flash->virtual_memory + offset;
-	chipaddr wrprotect = flash->virtual_registers + offset + 2;
+	chipaddr bios = flash->virtual_memory;
+	chipaddr wrprotect = flash->virtual_registers + page + 2;
 	uint8_t status;
 
 	// clear status register
-	chip_writeb(0x50, bios);
+	chip_writeb(0x50, bios + page);
 
 	// clear write protect
 	chip_writeb(0, wrprotect);
 
 	// now start it
-	chip_writeb(0x20, bios);
-	chip_writeb(0xd0, bios);
+	chip_writeb(0x20, bios + page);
+	chip_writeb(0xd0, bios + page);
 	programmer_delay(10);
 
 	// now let's see what the register is
-	status = wait_82802ab(flash->virtual_memory);
+	status = wait_82802ab(bios);
 	print_82802ab_status(status);
 
-	if (check_erased_range(flash, offset, flash->page_size)) {
+	if (check_erased_range(flash, offset, pagesize)) {
 		fprintf(stderr, "ERASE FAILED!\n");
 		return -1;
 	}
 	printf("DONE BLOCK 0x%x\n", offset);
 
 	return 0;
 }
 
 int erase_82802ab(struct flashchip *flash)
diff --git a/flashchips.c b/flashchips.c
index 913e030..2b19d89 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -277,19 +277,34 @@ struct flashchip flashchips[] = {
 		.name		= "AE49F2008",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= ASD_ID,
 		.model_id	= ASD_AE49F2008,
 		.total_size	= 256,
 		.page_size	= 128,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_FIXME, 
-		.erase		= erase_chip_jedec,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{128 * 1024, 1},
+					{96 * 1024, 1},
+					{8 * 1024, 2},
+					{16 * 1024, 1},
+				},
+				.block_erase = erase_sector_jedec,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = erase_chip_block_jedec,
+			}
+		},
 		.write		= write_jedec,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Atmel",
 		.name		= "AT25DF021",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= ATMEL_ID,
@@ -1134,30 +1149,80 @@ struct flashchip flashchips[] = {
 			}, {
 				.eraseblocks = { {256 * 1024, 1} },
 				.block_erase = erase_chip_block_jedec,
 			}
 		},
 		.write		= write_49f002,
 		.read		= read_memmapped,
 	},
 
+	/* The next two chip definitions have top/bottom boot blocks, but has no
+	device differenciation between the two */
 	{
 		.vendor		= "AMIC",
-		.name		= "A25L40P",
+		.name		= "A25L40PT",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= AMIC_ID,
 		.model_id	= AMIC_A25L40P,
 		.total_size	= 512,
 		.page_size	= 256,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_spi_rdid4,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{64 * 1024, 7},
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "AMIC",
+		.name		= "A25L40PU",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= AMIC_ID,
+		.model_id	= AMIC_A25L40P,
+		.total_size	= 512,
+		.page_size	= 256,
+		.tested		= TEST_OK_PRW,
+		.probe		= probe_spi_rdid4,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+					{64 * 1024, 7},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "AMIC",
 		.name		= "A29002B",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= AMIC_ID_NOPREFIX,
@@ -1247,230 +1312,711 @@ struct flashchip flashchips[] = {
 	{
 		.vendor		= "AMIC",
 		.name		= "A49LF040A",
 		.bustype	= CHIP_BUSTYPE_LPC,
 		.manufacture_id	= AMIC_ID_NOPREFIX,
 		.model_id	= AMIC_A49LF040A,
 		.total_size	= 512,
 		.page_size	= 64 * 1024,
 		.feature_bits	= FEATURE_REGISTERMAP,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_ZERO,	/* routine is wrapper to probe_jedec (pm49fl00x.c) */
-		.erase		= erase_49fl00x,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_eraser = erase_block_jedec,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_eraser = erase_chip_block_jedec,
+			}
+		},
 		.write		= write_49fl00x,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "EMST",
 		.name		= "F49B002UA",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= EMST_ID,
 		.model_id	= EMST_F49B002UA,
 		.total_size	= 256,
 		.page_size	= 4096,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_ZERO,	/* Datasheet has no timing info specified */
-		.erase		= erase_chip_jedec,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { 
+					{128 * 1024, 1},
+					{96 * 1024, 1},
+					{8 * 1024, 2},
+					{16 * 1024, 1},
+				},
+				.block_eraser = erase_sector_jedec,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_eraser = erase_chip_block_jedec,
+			}
+		},
 		.write		= write_49f002,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B05",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B05,
 		.total_size	= 64,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B05T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B05,
+		.total_size	= 64,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B10",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B10,
 		.total_size	= 128,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 3},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B10T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B10,
+		.total_size	= 128,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{32 * 1024, 3},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B20",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B20,
 		.total_size	= 256,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+					{64 * 1024, 3}
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B20T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B20,
+		.total_size	= 256,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{64 * 1024, 3},
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B40",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B40,
 		.total_size	= 512,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+					{64 * 1024, 7}
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B40T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B40,
+		.total_size	= 512,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{64 * 1024, 7}
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B80",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B80,
 		.total_size	= 1024,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+					{64 * 1024, 15}
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B80T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B80,
+		.total_size	= 1024,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{64 * 1024, 15}
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B16",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B16,
 		.total_size	= 2048,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+					{64 * 1024, 31}
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B16T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B16,
+		.total_size	= 2048,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{64 * 1024, 31}
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B32",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B32,
 		.total_size	= 4096,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+					{64 * 1024, 63}
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {4 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B32T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B32,
+		.total_size	= 4096,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{64 * 1024, 63}
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {4 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25B64",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25B64,
 		.total_size	= 8192,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+					{16 * 1024, 1},
+					{32 * 1024, 1},
+					{64 * 1024, 127}
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+	},
+
+	{
+		.vendor		= "Eon",
+		.name		= "EN25B64T",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= EON_ID_NOPREFIX,
+		.model_id	= EN_25B64,
+		.total_size	= 8192,
+		.page_size	= 256,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = {
+					{64 * 1024, 127}
+					{32 * 1024, 1},
+					{16 * 1024, 1},
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25D16",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25D16,
 		.total_size	= 2048,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 512} },
+				.block_eraser = spi_block_eraser_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_eraser = spi_block_eraser_d8,
+			}, {
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_eraser = spi_block_eraser_52,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_60,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25F05",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25F05,
 		.total_size	= 64,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 16} },
+				.block_eraser = spi_block_eraser_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_eraser = spi_block_eraser_d8,
+			}, {
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_eraser = spi_block_eraser_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_eraser = spi_block_eraser_60,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_eraser = spi_block_eraser_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25F10",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25F10,
 		.total_size	= 128,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 32} },
+				.block_eraser = spi_block_eraser_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 4} },
+				.block_eraser = spi_block_eraser_d8,
+			}, {
+				.eraseblocks = { {32 * 1024, 4} },
+				.block_eraser = spi_block_eraser_52,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_eraser = spi_block_eraser_60,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_eraser = spi_block_eraser_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25F20",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25F20,
 		.total_size	= 256,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 64} },
+				.block_eraser = spi_block_eraser_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 4} },
+				.block_eraser = spi_block_eraser_d8,
+			}, {
+				.eraseblocks = { {64 * 1024, 4} },
+				.block_eraser = spi_block_eraser_52,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_eraser = spi_block_eraser_60,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_eraser = spi_block_eraser_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25F40",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
@@ -1478,79 +2024,127 @@ struct flashchip flashchips[] = {
 		.total_size	= 512,
 		.page_size	= 256,
 		.tested		= TEST_OK_PROBE,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.erase		= NULL,
 		.block_erasers	=
 		{
 			{
-				.eraseblocks = { {4 * 1024, 2048} },
+				.eraseblocks = { {4 * 1024, 128} },
 				.block_erase = spi_block_erase_20,
 			}, {
-				.eraseblocks = { {4 * 1024, 2048} },
+				.eraseblocks = { {64 * 1024, 8} },
 				.block_erase = spi_block_erase_d8,
 			}, {
-				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.eraseblocks = { {512 * 1024, 1} },
 				.block_erase = spi_block_erase_60,
 			}, {
-				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.eraseblocks = { {512 * 1024, 1} },
 				.block_erase = spi_block_erase_c7,
 			},
 		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25F80",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25F80,
 		.total_size	= 1024,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 256} },
+				.block_eraser = spi_block_eraser_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 16} },
+				.block_eraser = spi_block_eraser_d8,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_60,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25F16",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25F16,
 		.total_size	= 2048,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 512} },
+				.block_eraser = spi_block_eraser_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_eraser = spi_block_eraser_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_60,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Eon",
 		.name		= "EN25F32",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= EON_ID_NOPREFIX,
 		.model_id	= EN_25F32,
 		.total_size	= 4096,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 1024} },
+				.block_eraser = spi_block_eraser_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 64} },
+				.block_eraser = spi_block_eraser_d8,
+			}, {
+				.eraseblocks = { {4 * 1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_60,
+			}, {
+				.eraseblocks = { {4 * 1024 * 1024, 1} },
+				.block_eraser = spi_block_eraser_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "EON",
 		.name		= "EN29F002(A)(N)B",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= EON_ID,
@@ -1737,70 +2331,106 @@ struct flashchip flashchips[] = {
 
 	{
 		.vendor		= "Intel",
 		.name		= "28F001BX-B",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= INTEL_ID,
 		.model_id	= P28F001BXB,
 		.total_size	= 128,
 		.page_size	= 128 * 1024, /* 8k + 2x4k + 112k */
-		.tested		= TEST_BAD_ERASE|TEST_BAD_WRITE,
+		.tested		= TEST_BAD_WRITE,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_ZERO,	/* Datasheet has no timing info specified */
 		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { 
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+					{112 * 1024, 1},
+				},
+				.block_erase = erase_82802ab,
+			},
+		},
 		.write		= NULL,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Intel",
 		.name		= "28F001BX-T",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= INTEL_ID,
 		.model_id	= P28F001BXT,
 		.total_size	= 128,
 		.page_size	= 128 * 1024, /* 112k + 2x4k + 8k */
-		.tested		= TEST_OK_PR|TEST_BAD_ERASE|TEST_BAD_WRITE,
+		.tested		= TEST_OK_PR|TEST_BAD_WRITE,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_ZERO,	/* Datasheet has no timing info specified */
 		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { 
+					{112 * 1024, 1},
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+				},
+				.block_erase = erase_82802ab,
+			},
+		},
 		.write		= NULL,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Intel",
 		.name		= "82802AB",
 		.bustype	= CHIP_BUSTYPE_FWH,
 		.manufacture_id	= INTEL_ID,
 		.model_id	= I_82802AB,
 		.total_size	= 512,
 		.page_size	= 64 * 1024,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_82802ab,
 		.probe_timing	= TIMING_IGNORED, /* routine does not use probe_timing (82802ab.c) */
-		.erase		= erase_82802ab,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_erase = erase_82802ab,
+			},
+		},
 		.write		= write_82802ab,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Intel",
 		.name		= "82802AC",
 		.bustype	= CHIP_BUSTYPE_FWH,
 		.manufacture_id	= INTEL_ID,
 		.model_id	= I_82802AC,
 		.total_size	= 1024,
 		.page_size	= 64 * 1024,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_82802ab,
 		.probe_timing	= TIMING_IGNORED, /* routine does not use probe_timing (82802ab.c) */
-		.erase		= erase_82802ab,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 16} },
+				.block_erase = erase_82802ab,
+			},
+		},
 		.write		= write_82802ab,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Macronix",
 		.name		= "MX25L512",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= MX_ID,
@@ -2011,19 +2641,35 @@ struct flashchip flashchips[] = {
 		.name		= "MX25L1635D",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= MX_ID,
 		.model_id	= MX_25L1635D,
 		.total_size	= 2048,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 512} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Macronix",
 		.name		= "MX25L3205",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= MX_ID,
@@ -2059,83 +2705,163 @@ struct flashchip flashchips[] = {
 		.name		= "MX25L3235D",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= MX_ID,
 		.model_id	= MX_25L3235D,
 		.total_size	= 4096,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 1024} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 64} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {4 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {4 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Macronix",
 		.name		= "MX25L6405",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= MX_ID,
 		.model_id	= MX_25L6405,
 		.total_size	= 8192,
 		.page_size	= 256,
 		.tested		= TEST_OK_PROBE,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 128} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 128} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Macronix",
 		.name		= "MX25L12805",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= MX_ID,
 		.model_id	= MX_25L12805,
 		.total_size	= 16384,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_60_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 4096} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 256} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {16 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {16 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
 
 	{
 		.vendor		= "Macronix",
 		.name		= "MX29F001B",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= MX_ID,
 		.model_id	= MX_29F001B,
 		.total_size	= 128,
 		.page_size	= 32 * 1024,
-		.tested		= TEST_OK_PRE,
+		.tested		= TEST_OK_PR,
 		.probe		= probe_29f002,
 		.probe_timing	= TIMING_IGNORED, /* routine don't use probe_timing (mx29f002.c) */
-		.erase		= erase_29f002,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { 
+					{8 * 1024, 1},
+					{4 * 1024, 2},
+					{8 * 1024, 2},
+					{32 * 1024, 1},
+					{64 * 1024, 1},
+				},
+				.block_erase = erase_sector_29f002,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = erase_chip_29f002,
+			}
+		},
 		.write		= write_jedec_1,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Macronix",
 		.name		= "MX29F001T",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= MX_ID,
 		.model_id	= MX_29F001T,
 		.total_size	= 128,
 		.page_size	= 32 * 1024,
-		.tested		= TEST_OK_PRE,
+		.tested		= TEST_OK_PR,
 		.probe		= probe_29f002,
 		.probe_timing	= TIMING_IGNORED, /* routine don't use probe_timing (mx29f002.c) */
-		.erase		= erase_29f002,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { 
+					{64 * 1024, 1},
+					{32 * 1024, 1},
+					{8 * 1024, 2},
+					{4 * 1024, 2},
+					{8 * 1024, 1},
+				},
+				.block_erase = erase_sector_29f002,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = erase_chip_29f002,
+			}
+		},
 		.write		= write_jedec_1,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Macronix",
 		.name		= "MX29F002B",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= MX_ID,
@@ -2201,19 +2927,29 @@ struct flashchip flashchips[] = {
 		.name		= "MX29LV040",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= MX_ID,
 		.model_id	= MX_29LV040,
 		.total_size	= 512,
 		.page_size	= 64 * 1024,
 		.tested		= TEST_OK_PR,
 		.probe		= probe_29f002,
 		.probe_timing	= TIMING_IGNORED, /* routine don't use probe_timing (mx29f002.c) */
-		.erase		= erase_29f002,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 8}, },
+				.block_erase = erase_sector_29f002,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = erase_chip_29f002,
+			},
+		},
 		.write		= write_jedec_1,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "Numonyx",
 		.name		= "M25PE10",
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= ST_ID,
diff --git a/flashchips.h b/flashchips.h
index 684b8b9..19ff745 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -158,25 +158,41 @@
  * Vendor and device ID of EN29 series are both prefixed with 0x7F, which
  * is the continuation code for IDs in bank 2.
  * Vendor ID of EN25 series is NOT prefixed with 0x7F, this results in
  * a collision with Mitsubishi. Mitsubishi once manufactured flash chips.
  * Let's hope they are not manufacturing SPI flash chips as well.
  */
 #define EON_ID			0x7F1C	/* EON Silicon Devices */
 #define EON_ID_NOPREFIX		0x1C	/* EON, missing 0x7F prefix */
 #define EN_25B05		0x2010	/* Same as P05, 2^19 kbit or 2^16 kByte */
+#define EN_25B05T		0x25
+#define EN_25B05B		0x95
 #define EN_25B10		0x2011	/* Same as P10 */
+#define EN_25B10T		0x40
+#define EN_25B10B		0x30
 #define EN_25B20		0x2012	/* Same as P20 */
+#define EN_25B20T		0x41
+#define EN_25B20B		0x31
 #define EN_25B40		0x2013	/* Same as P40 */
+#define EN_25B40T		0x42
+#define EN_25B40B		0x32
 #define EN_25B80		0x2014	/* Same as P80 */
+#define EN_25B80T		0x43
+#define EN_25B80B		0x33
 #define EN_25B16		0x2015	/* Same as P16 */
+#define EN_25B16T		0x44
+#define EN_25B16B		0x34
 #define EN_25B32		0x2016	/* Same as P32 */
+#define EN_25B32T		0x45
+#define EN_25B32B		0x35
 #define EN_25B64		0x2017	/* Same as P64 */
+#define EN_25B64T		0x46
+#define EN_25B64B		0x36
 #define EN_25D16		0x3015
 #define EN_25F05		0x3110
 #define EN_25F10		0x3111
 #define EN_25F20		0x3112
 #define EN_25F40		0x3113
 #define EN_25F80		0x3114
 #define EN_25F16		0x3115
 #define EN_25F32		0x3116
 #define EN_29F512		0x7F21