diff --git a/flashchips.c b/flashchips.c
index 8e90d2a..452cef3 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -1193,78 +1193,78 @@ struct flashchip flashchips[] = {
 		.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} },
+				.eraseblocks = { {512 * 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,
 		.model_id	= AMIC_A29002B,
 		.total_size	= 256,
 		.page_size	= 64 * 1024,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_29f002,
 		.probe_timing	= TIMING_IGNORED, /* routine don't use probe_timing (mx29f002.c) */
 		.erase		= NULL,
 		.block_erasers	=
 		{
 			{
 				.eraseblocks = { 
 					{16 * 1024, 1},
 					{8 * 1024, 2},
 					{32 * 1024, 1},
 					{64 * 1024, 3},
 				},
 				.block_erase = erase_sector_29f002,
 			}, {
-				.eraseblocks = { {256 * 1024, 1} },
+				.eraseblocks = { {512 * 1024, 1} },
 				.block_erase = erase_chip_29f002,
 			},
 		},
 		.write		= write_jedec_1,
 		.read		= read_memmapped,
 	},
 
 	{
 		.vendor		= "AMIC",
 		.name		= "A29002T",
 		.bustype	= CHIP_BUSTYPE_PARALLEL,
 		.manufacture_id	= AMIC_ID_NOPREFIX,
 		.model_id	= AMIC_A29002T,
 		.total_size	= 256,
 		.page_size	= 64 * 1024,
 		.tested		= TEST_OK_PR,
 		.probe		= probe_29f002,
 		.probe_timing	= TIMING_IGNORED, /* routine don't use probe_timing (mx29f002.c) */
 		.erase		= NULL,
 		.block_erasers	=
 		{
 			{
 				.eraseblocks = {