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CHAPTER 8: DEBUGGER
196 EPSON S5U1C63000A MANUAL
(S1C63 FAMILY ASSEMBLER PACKAGE)
bsp (break stack pointer)
Function
This command allows you to specify a stack area to generate a break for illegal stack access.
A break occurs when stack operation is performed in locations other than the area specified by this
command.
Format
(1) >bsp <address1> <address2> <address3> <address4>↵ (direct input mode)
(2) >bsp↵ (guidance mode)
Stack area set status
SP1 start address ? : <address1>↵
SP1 end address ? : <address2>↵
SP2 start address ? : <address3>↵
SP2 end address ? : <address4>↵
>
<address1>: SP1 start address; hexadecimal or symbol (IEEE-695 format only)
<address2>: SP1 end address; hexadecimal or symbol (IEEE-695 format only)
<address3>: SP2 start address; hexadecimal or symbol (IEEE-695 format only)
<address4>: SP2 end address; hexadecimal or symbol (IEEE-695 format only)
Condition: 0 ≤ address1(2) ≤ 0x03ff, 0 ≤ address3(4) ≤ 0x00ff
Examples
Format (1)
>bsp 0 3ff 0 ff↵ ... Sets SP1 area to 0x0–0x3FF and SP2 area to 0x0–0xFF.
Format (2)
>bsp↵
SP1 : 0000 - 03FF SP2 : 0000 - 00FF
SP1 start address ? : 0↵ ... Address is input.
SP1 end address ? : 1ff↵
SP2 start address ? : 0↵
SP2 end address ? : ff↵
>bsp↵
SP1 : 0000 - 01FF SP2 : 0000 - 00FF
SP1 start address ? : ↵ ... Terminated by [Enter] key.
>
∗ If you press only [Enter] in the middle of a guidance, the command is canceled.
Notes
• The stack area that is set by this command will not affect the stack operation performed in the pro-
gram.
• Specify the SP1 address in the range of 0 to 0x3ff and the SP2 address in the range of 0 to 0xff. Entering an
address exceeding this limit will result in an error.
Error : SP1 address out of range, use 0-0x3FF
Error : SP2 address out of range, use 0-0xFF
• Specify the SP1 address in units of 4 words (start address = multiple of 4; end address = multiple of 4
+ 3).
• Due to the S1C63000 CPU's prefetch function, SP1 can access the top end of the actually used stack + 4
words. Depending on your system configuration, add 4 to the end address when you set it.
• The program stops one to two instructions after the break condition has been met.