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-rw-r--r--ao-tools/lib/ao-selfload.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ao-tools/lib/ao-selfload.c b/ao-tools/lib/ao-selfload.c
index 0a23dfda..754cd784 100644
--- a/ao-tools/lib/ao-selfload.c
+++ b/ao-tools/lib/ao-selfload.c
@@ -110,6 +110,7 @@ ao_self_write(struct cc_usb *cc, struct ao_hex_image *image)
start = image->address;
if (stop > image->address + image->length)
stop = image->address + image->length;
+ memset(block, 0xff, 0x100);
memcpy(block + start - address, image->data + start - image->address, stop - start);
ao_self_block_write(cc, address, block);
ao_self_block_read(cc, address, check);