Difference between revisions of "83Plus:RAM:8478"
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| − | [[Category:83Plus:RAM:By_Name|OP1-OP6]] | + | [[Category:83Plus:RAM:By_Name|OP1-OP6]] [[Category:83Plus:RAM:By_Address|8478 - OP1-OP6]] |
| − | [[Category:83Plus:RAM:By_Address|8478 - OP1-OP6]] | + | |
== Synopsis == | == Synopsis == | ||
'''Official Name:''' OP1-OP6 | '''Official Name:''' OP1-OP6 | ||
Latest revision as of 21:22, 29 March 2005
Synopsis
Official Name: OP1-OP6
Memory Address: 8478
Length: 6 "registers" of 11 bytes each.
This area of memory is commonly used as temporary memory and for argument passing by many system routines.
Comments
This area is usually divided into six 11-byte registers:
- OP1 = 8478h
- OP2 = 8483h
- OP3 = 848Eh
- OP4 = 8499h
- OP5 = 84A4h
- OP6 = 84AFh
Among the many functions the OP registers are used for:
- A single OP register can hold an 11-byte floating point number.
- Two adjacent OP registers -- usually OP1 and OP2, OP3 and OP4, or OP5 and OP6 -- can hold a 22-byte complex number.
- The first 9 bytes of an OP register can hold a variable name.
- OP3-OP6 are used for storing short strings.
- All 6 OP registers can be used together to hold a single big integer.
