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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: 2005-09-13 21:27:12 $
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Version: $Date: 2005-11-02 21:16:34 $
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Release 0.6 BETA
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----------------
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*******************************************************************************
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P2 Port value restored after expander access
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After access to expander interface (ANLD Pp; MOVD A,Pp; MOVD Pp,A; ORLD Pp)
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the port value of P2 is restored. This is wrong according to chapter "Port 2
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Operations" of the "Expanded MCS-48 System" manual. It states that previously
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latched I/O information will be removed and not restored.
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Fixed in:
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p2.vhd 1.8
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Fix will be included in next release.
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*******************************************************************************
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Problem when INT and JMP
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When code is executed from Memory Bank 1, the injected CALL triggered by the
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interrupt does not always vector to address 3. This happens because of a bus
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collision between the decoder unit and the db_bus unit. The resulting address
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can be either:
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* 000h, 001h, 002h, 003h for external and timer interrupt
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* 004h, 005h, 006h, 007h for timer interrupt
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The problem was introduced in release 0.6 BETA when the glitch on PCH was
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fixed.
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Fixed in:
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decoder.vhd 1.21
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New regression test: int_on_mb1
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Fix will be included in next release.
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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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P2 Port value restored after expander access
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See above.
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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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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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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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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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Program Memory Bank 1.
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Line 91... |
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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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P2 Port value restored after expander access
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See above.
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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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Target address of JMP and CALL to Program Memory Bank 1 corrupted by interrupt
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See above.
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See above.
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*******************************************************************************
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*******************************************************************************
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Line 138... |
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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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P2 Port value restored after expander access
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See above.
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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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Target address of JMP and CALL to Program Memory Bank 1 corrupted by interrupt
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See above.
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See above.
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*******************************************************************************
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*******************************************************************************
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Line 188... |
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Release 0.2 BETA
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Release 0.2 BETA
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----------------
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----------------
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*******************************************************************************
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*******************************************************************************
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P2 Port value restored after expander access
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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 0.1 BETA
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Release 0.1 BETA
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----------------
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----------------
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*******************************************************************************
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*******************************************************************************
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P2 Port value restored after expander access
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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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