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commit 96d2b61c049773c02a41b220a0104d24c75fd284
Author: Ãyvind Harboe <oyv...@zy...>
Date: Tue Dec 8 10:40:47 2009 +0100
zy1000: some background info on the zy1000 file.
Signed-off-by: Ãyvind Harboe <oyv...@zy...>
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c
index 5b6e4ea..5ddc7c5 100644
--- a/src/jtag/zy1000/zy1000.c
+++ b/src/jtag/zy1000/zy1000.c
@@ -16,6 +16,31 @@
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+
+/* This file supports the zy1000 debugger: http://www.zylin.com/zy1000.html
+ *
+ * The zy1000 is a standalone debugger that has a web interface and
+ * requires no drivers on the developer host as all communication
+ * is via TCP/IP. The zy1000 gets it performance(~400-700kBytes/s
+ * DCC downloads @ 16MHz target) as it has an FPGA to hardware
+ * accelerate the JTAG commands, while offering *very* low latency
+ * between OpenOCD and the FPGA registers.
+ *
+ * The disadvantage of the zy1000 is that it has a feeble CPU compared to
+ * a PC(ca. 50-500 DMIPS depending on how one counts it), whereas a PC
+ * is on the order of 10000 DMIPS(i.e. at a factor of 20-200).
+ *
+ * The zy1000 revc hardware is using an Altera Nios CPU, whereas the
+ * revb is using ARM7 + Xilinx.
+ *
+ * See Zylin web pages or contact Zylin for more information.
+ *
+ * The reason this code is in OpenOCD rather than OpenOCD linked with the
+ * ZY1000 code is that OpenOCD is the long road towards getting
+ * libopenocd into place. libopenocd will support both low performance,
+ * low latency systems(embedded) and high performance high latency
+ * systems(PCs).
+ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-----------------------------------------------------------------------
Summary of changes:
src/jtag/zy1000/zy1000.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
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