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Known bugs of the T48 uController core
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Known bugs of the T48 uController core
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======================================
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======================================
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Version: $Date: 2005-06-08 19:23:24 $
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Version: $Date: 2005-09-13 21:27:12 $
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Release 0.5 BETA
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Release 0.5 BETA
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----------------
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----------------
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*******************************************************************************
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*******************************************************************************
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Target address of JMP and CALL to Program Memory Bank 1 corrupted by interrupt
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An interrupt occuring during the execution of a JMP instruction, forces bit 11
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of the target address to 0. This corrupts target addresses that are located in
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Program Memory Bank 1.
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Fixed in:
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int.vhd 1.5
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New regression test: white_box/int_on_int
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Fix will be included in next release.
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*******************************************************************************
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MSB of Program Counter changed upon PC increment
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MSB of Program Counter changed upon PC increment
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The current implementation of the Program Counter allows that the MSB (bit 11)
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The current implementation of the Program Counter allows that the MSB (bit 11)
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is modifed when the PC increments at address 07FFh linear code execution. This
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is modifed when the PC increments at address 07FFh linear code execution. This
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is contrary to the description found in "The Expanded MCS-48 System" which
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is contrary to the description found in "The Expanded MCS-48 System" which
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Release 0.4 BETA
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Release 0.4 BETA
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----------------
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----------------
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*******************************************************************************
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*******************************************************************************
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Target address of JMP and CALL to Program Memory Bank 1 corrupted by interrupt
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See above.
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*******************************************************************************
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MSB of Program Counter changed upon PC increment
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MSB of Program Counter changed upon PC increment
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See above.
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See above.
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*******************************************************************************
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*******************************************************************************
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Release 0.3 BETA
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Release 0.3 BETA
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----------------
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----------------
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*******************************************************************************
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*******************************************************************************
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Target address of JMP and CALL to Program Memory Bank 1 corrupted by interrupt
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See above.
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*******************************************************************************
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MSB of Program Counter changed upon PC increment
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MSB of Program Counter changed upon PC increment
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See above.
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See above.
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*******************************************************************************
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*******************************************************************************
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