The following requests are used to debug the mainframe.
STORE DATA IN CORE REQUEST
Data is stored in core by using this command.
Format
The statement format is:
LHX,cl, b/ d,d, ... ,d Parameters
The parameters used to store data in core are:
cl--core location
b-base (0 if not specified)
d-data (four-digit hexadecimal number)
6-1
· LHX Examples
The following examples indicate how to utilize the LHX request.
To store data into core location phIs base, use:
LHX,1600,0/14EA
This stores 14EA into location 1600.
A one-word relative instruction would be as foIlows:
LHX,c1,b/2-digit OP code*address
This loads core with the two-digit OP code which precedes the asterisk and the 8-bit relative increment (which is obtained by subtracting the address of the core location in which the data is to be stored from the address which follows this asterisk). The relative increment must be less than ±127; otherwise, an incorrect relative increment will be stored.
NOTE
The address which follows the asterisk is always a 16-bit absolute address.
To store C805 into location 1601; therefore, use:
LHX,1601,0/C8*1606 For a 16-bit relative address, use:
LHX,c1,b/*address
This loads core with the 16-bit relative increment. The increment is obtained by subtracting the address of the core location in which the data is to be stored from the address which follows this asterisk.
NOTE
The address which follows this asterisk is always a 16-bit absolute address.
To store FEFE into location 1602; therefore, use:
LHX,1602,0/* 1501
In the example, the address is $0101 locations relative to the current location.
6-2
NOTE
LHX,1600,0/14EA,C8*1606,
*1501 has the same result as the three preceding examples.
LOAD DECIMAL INTO CORE REQUEST A decimal is loaded into core via this request.
Format
The statement format is:
LDC,starting address/d1,d2, ... ,dn
DUMP CORE REQUEST
To dump a five-digit decimal value of core from start plus base to end plus base, the following format is used:
DDC,sc,ec,b Parameters
The parameters are:
sc-start core ec-end core
b-base (O if not specified)
To dump a four-digit hexadecimal value of core from start plus base to end plus base, the following format is used:
DPC,sc,ec,b Parameters
The parameters in this example are:
sc-start core ec-end core
b-base (O if not specified) WRITE CORE TO DISK REQUEST To write core to disk, use this command.
Format
The statement format is:
WCD,sector,word in sector, core location, number of words
Parameters
The number:'of-words parameter is decimal, and all other parameters are hexadecimal.
READ DISK TO CORE REQUEST This statement is used to read disk to core.
Format
The statement format is:
RDC,sector,word in sector,core location, number of words
Parameters
The number-of-words parameter is decimal, and all other parameters are hexadecimal.
SEARCH CORE LOCATIONS REQUEST
By using this command, core locations are searched from start core to end core by the increment for a match between AND (mask, number) and AND (mask, core).
Format
The statement format is:
SCN ,sc,ec,no,m,i Parameters
The following parameters are applicable for the search core request format:
sc-start core ec--end core no----number
m-mask; "1" bits in mask indicate the position in core is examined; "0" bits in mask indicate the bit position in core is not examined
i-increment
Example of Search Core Location The following search could be used:
SCN ,0, 7FFF,A1F7 ,FFOO,2
In this example, the command calls for a search 0,2,4,6,8, ... for AND (A1F7,FFOO) or AND (A1xx,FFOO) where xx may have any value. The locations and contents of the locations which contain the searched configuration are printed after the following heading:
CELL CONTENTS
REASSIGN LIST DEVICE USED BY DEBUG REQUEST
This command allows the user to reassign any list device which is required for output. .
Format
The statement format is:
CLU,lu, Parameter
The following parameter is used in the format for the CLU request:
lu---:-Iogical unit number of list device to be used by DEBUG
SEARCH CORE FOR PARITY ERROR REQUEST Core is searched for parity errors via this request.
Format
The format for this command is:
SPE,last location in core
With this command, location of the parity error is printed. The following comment terminates the request:
SEARCH FINISHED
ADD HEXADECIMAL NUMBERS REQUEST Hexadecimal numbers can be added through the use of this request.
Format
The format for adding up to eight hexadecimal numbers is:
ADH,numberl ,number2, ... ,number8
SUBTRACT HEXADECIMAL NUMBERS REQUEST To subtract hexadecimal numbers, use this request.
Format
The format for subtracting number 2 from number 1 (hexadecimal) is:
SBH,numberl ,number2
6-3
SCHEDULE COMPLETION WCATION REQUEST Schedule the specified core location at the specified priority level by passing the contents in the Q register.
Completion location may also designate 'directory calls.
Format
The statement format is:
SCH,cl,Q,cpl Parameters
The parameters for this request are:
cl--core location (four-digit hexadecimal number) Q--contents of Q register
cpl--completion priority level SET CORE REQUEST
This command enables the operator to set core from the start to the end with pattern.
Format
The statement format is:
SET,sc,ec,pattern Parameters
The parameters for the set core request format are defined as follows:
sc-start core ec-end core
pattern-word to store in core
SET PROGRAM PROTECT BIT REQUEST The program protect bit is set via this request.
Format
The statement format is:
SPP,sc,ec 6-4
Parameters
This request uses the following parameters as defined:
sc-start core ec-end core
CLEAR PROGRAM PROTECT BIT REQUEST The program protect bit is cleared via this request.
Format
The statement format is:
CPP,sc,ec Parameters
The parameters for this statement request format are:
sc-start core ec-end core
MOVE BLOCK IN CORE REQUEST To move a block in core, this request is used.
Format
The statement format is:
MBC,sc,ec,nl Parameters
These parameters are as follows:
sc-start core ec-end core nl-new location