Difference between revisions of "84PCE:Syscalls:0210DC"
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| − | [[Category:84PCE:Syscalls: | + | [[Category:84PCE:Syscalls:By Name:Memory|MemClear]] |
| − | [[Category:84PCE:Syscalls: | + | [[Category:84PCE:Syscalls:By Name|MemClear]] |
| − | [[Category:84PCE:Syscalls: | + | [[Category:84PCE:Syscalls:By Address|0210DC - MemClear]] |
== Synopsis == | == Synopsis == | ||
Revision as of 11:21, 26 May 2015
Synopsis
Official Name: MemClear
Syscall Address: 0210DCh
Sets a block of memory to zero.
Inputs
- HL: Address of memory block.
- BC: Number of bytes to zero.
Outputs
- DE: Points to byte after memory block.
Destroys
- AF, BC, HL
Comments
This routine uses an LDIR instruction to clear the memory block, so do not pass it a block length of 0 or 1 or it will erase 16777216 bytes.
See also: MemSet
Example
;Clear out pixelShadow
ld hl,pixelShadow
ld bc,8400
call _MemClear
