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diff --git a/sdcard/spi_mode/write_single_block/README b/sdcard/spi_mode/write_single_block/README
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+-------------------------------------------------------------------------------
+SD card / SPI-mode / CMD24 (write single block)
+-------------------------------------------------------------------------------
+
+This set of example captures demonstrates CMD24 (write single block)
+commands including their data phase.
+
+Pierre Poulain provided these files in bug #1365 as public domain.
+
+
+Logic analyzer setup
+--------------------
+
+  Probe    SD card
+  ----------------
+  0        CS#
+  1        MOSI
+  2        MISO
+  3        CLK / SCK
+
+
+Data
+----
+
+File data_transfer_start_snippet.sr was recorded in a live setup, and
+contains the start of a write command -- but does not complete it which
+is why the decoder won't annotate the operation.
+
+File data_transfer_complete_simulated.sr contains a complete CMD24 start
+as well as the communication of the R1 response, the data start token,
+the payload data, and the data response. This capture was created by a
+simulation.
diff --git a/sdcard/spi_mode/write_single_block/data_transfer_complete_simulated.sr b/sdcard/spi_mode/write_single_block/data_transfer_complete_simulated.sr
new file mode 100644
index 0000000..b35ed20
--- /dev/null
+++ b/sdcard/spi_mode/write_single_block/data_transfer_complete_simulated.sr
diff --git a/sdcard/spi_mode/write_single_block/data_transfer_start_snippet.sr b/sdcard/spi_mode/write_single_block/data_transfer_start_snippet.sr
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index 0000000..6ced8c1
--- /dev/null
+++ b/sdcard/spi_mode/write_single_block/data_transfer_start_snippet.sr