What's New in C51 Version 9.60

• [CX51 Compiler]
  • Modified: sbit symbol names with more than 40 characters get truncated. This limitation has been removed. Example:

    #define SFR_P2 0xA0
    
    sbit tested_very_long_compiler_symbol_name_group_a_section_b = SFR_P2^1;        /* Definition of a symbol name with 55 characters. */
                  |         |         |         |         |
                  |         |         |         |         +-----  Character no 50
                  |         |         |         +---------------  Character no 40
                  |         |         +-------------------------  Character no 30
                  |         +-----------------------------------  Character no 20
                  +---------------------------------------------  Character no 10
    
    
         tested_very_long_compiler_symbol_name_gr                 <--- The generated symbol name has only 40 characters.
                                                 |             |
                                                 o-------------o  Truncated section
    ...
    

  • Corrected: A wrong code will be generated for a small while-loop when NOAREGS has been specified. This error has been introduced with compiler version 9.59. Example:

    Correct code generation without NOAREGS.
    
    0000         ?C0001:
    0000 EF                MOV     A,R7     <--- Load of ACC. >-------------------------------------------+
    0001 1F                DEC     R7                                                                     |
    0002 AC06              MOV     R4,AR6                                                                 |
    0004 7001              JNZ     ?C0007   o--- The JNZ instruction jumps based on the value of ACC. <---+
    0006 1E                DEC     R6
    0007         ?C0007:
    0007 4C                ORL     A,R4
    0008 70F6              JNZ     ?C0001
    
    
    Wrong code generation with NOAREGS.
    
    0000         ?C0001:
    0000 EF                MOV     A,R7     <--- Load of ACC. >-------------------------------------------+
    0001 1F                DEC     R7                                                                     |
    0002 EE                MOV     A,R6     <--- The generated code overwrites the ACC register. >--------X
    0003 FC                MOV     R4,A                                                                   |
    0004 7001              JNZ     ?C0007   o--- The JNZ instruction is using the wrong value! <----------+
    0006 1E                DEC     R6
    0007         ?C0007:
    0007 4C                ORL     A,R4
    0008 70F6              JNZ     ?C0001
    ...
    

• [New Supported Devices]
  • ABOV Semiconductor
    MC94F1202A, MC97FG216, MC96F8104, MC96F8216S, MC96F7416S,
    MC96F6632S, MC96F6432Q, MC96F6432S, MC96F6332S, MC96F6409,
    A94B114, A97C450, A96R717, MC97F2664A, MC96F8316A,
    MC96P6608, MC96F8316S, MC96F8208S, MC96F6509, MC96F6432A, and
    MC94F1102A.
  • ISSI
    IS31CS8973,
  • Megawin
    MG86Fx508, MG86Fx104, MG84FG516, MG84FL54BD, MG82G5E32,
    MG82FG5D16, MG82FG5C64, MG82FG5C32, MG82FG5B32, MG82FG5B16,
    MG82FG5A64, MG82FG5A32, MG82Fx316, MG82Fx308, MG82Fx564,
    MG82Fx532, MG87Fx04, MG87Fx6051, MG87Fx4051, MG87Fx2051, and
    M87Fx52.
  • Microchip
    IS2083B.
• [Device Simulation]
  • Corrected: for Atmel AT89C51CC03 the simulation crashes during the startup phase when the project was initialized with the -pATXC3 setting.
• [Target debugging \ Device programmer]
  • Added: Segger JLink IS2083 debug driver to support the IS2083B from Microchip.
  • Updated: NULink driver to version 2.06.6875.
• [µVision]
  • This C51 release comes with µVision V5.27.1.
  • The Customize Tools Menu ... option is extended with Export/Import for sharing the tools menu setup across PCs.
• [Supported Operating Systems]
  • Refer to System Requirements Overview for hardware and operating system requirements.