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$Id: README_known_issues.txt 693 2015-06-21 14:02:46Z mueller $
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Known issues for this release.
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The case id indicates the release when the issue was first recognized.
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- V0.66-1: the TM11 controller transfers data byte wise (all disk do it 16bit
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word wise) and allows for odd byte length transfers. Odd length transfers
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are currently not supported and rejected as invalid command. Odd byte
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length records aren't used by OS, if at all, so in practice this limitation
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isn't relevant.
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- V0.65-1: ti_rri sometimes crashes in normal rundown (exit or ^D) when
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a cuff: type rlink is active. One gets
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terminate called after throwing an instance of 'Retro::Rexception'
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what(): RlinkPortCuff::Cleanup(): driver thread failed to stop
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doesn't affect normal operation, will be fixed in upcoming release.
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- V0.65-2: some exotic RH70/RP/RM features and conditions not implemented yet
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- last block transfered flag (in DS)
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- CS2.BAI currently ignored and not handled
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- read or write 'with header' gives currently ILF
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All this isn't used by any OS, so in practice not relevant.
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- V0.64-7: ghdl simulated OS boots via ti_w11 (-n4 ect options) fail due to a
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flow control issue (likely since V0.63).
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- V0.64-6: IO delays still unconstraint in vivado. All critical IOs use
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explicitly IOB flops, thus timing well defined.
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- V0.64-5: w11a_tb_guide.txt covers only ISE based tests (see also V0.64-4).
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- V0.64-4: No support for the Vivado simulator (xsim) yet. With ghdl only
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functional simulations, post synthesis (_ssim) fails to compile.
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- V0.64-3: Highest baud rate with basys3 and nexys4 is 10 MBaud. 10 MBaud is
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not supported according to FTDI, but works. 12 MBaud in an upcoming release.
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- V0.64-2: rlink throughput on basys3/nexys4 limited by serial port stack
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round trip times. Will be overcome by libusb based custom driver.
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- V0.64-1: The large default transfer size for disk accesses leads to bad
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throughput in the DL11 emulation for low speed links, like the
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460kBaud the S3board is limited too. Will be overcome by a DL11
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controller with more buffering.
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- V0.62-2: rlink v4 error recovery not yet implemented, will crash on error
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- V0.62-1: Command lists aren't split to fit in retransmit buffer size
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{last two issues not relevant for w11 backend over USB usage because
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the backend produces proper command lists and the USB channel is
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usually error free}
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