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I think the Altera UP1/UP2/UP3 boards have a connection like this, so you can daisy chain boards. However, they have two JTAG connectors, one for the USB-Blaster (or ByteBlaster at the time they were created) and then another for the daisy chain. Does your board have two JTAG connectors?
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Unfortunately no, the byteblaster is onboard and the jtag connector is for the last device on the jtag chain, it is not for the usbblaster cable, i mean if you plug the usb-jtag-cable there you will be wrong in the jtag chain
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I'd create a USB-Blaster to ByteBlaster cable adapter. It won't take very long. Get a DB25 connector and a 10-pin header, and wire them up.
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the problem is: i am on x86 laptop which has no lpt port, modern laptops and desktops do no have lpt port, too.
An other problem is all usb-to-parallel port adapter are not working, so the only solution is to use the usb-jtag.
this is the connection scheme i got reversing the board
parallel port
/----------------------------------------
| byteblaster |
\----------------------------------------/
| | | |
/----------------------------------------
| jtag |
\----------------------------------------/
tdi tdo tms tck
| | | |
| | | |
| | | |
| | tdi | |
| /---------------\ | |
| | eeprom |----+ |
| | epc2lc20 |---------+
| \---------------/ | |
| | tdo | |
| | | |
| | tdi | |
| /---------------\ | |
| | flex10k |----+ |
| | epf10k10lc84 |---------+
| \---------------/ | |
| | tdo | |
| | | |
| | tdi | |
| /---------------\ | |
| | j2 connector |----+ |
| | to other |---------+
| | jtag chain | | |
| \---------------/ | |
| | tdo | |
| | | |
+-----------+
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