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| -rw-r--r-- | src/jtag/zy1000/zy1000.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c index 5b6e4ea0..5ddc7c5c 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 |