Difference between revisions of "84PCE:Syscalls:0002E8"
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| − | [[Category:84PCE:Syscalls:By Name| | + | [[Category:84PCE:Syscalls:By Name|EraseFlashSector]] |
| − | [[Category:84PCE:Syscalls:By Address| | + | [[Category:84PCE:Syscalls:By Address|0002DC - EraseFlashSector]] |
== Synopsis == | == Synopsis == | ||
| − | '''Hypothesized Official Name:''' | + | '''Hypothesized Official Name:''' EraseFlashSector |
| − | '''Syscall Address:''' | + | '''Syscall Address:''' 0002DCh |
| − | + | Erases an entire sector (64kb) of flash memory. This basically resets the bytes in the sector back to the nominal value of FF. | |
=== Inputs === | === Inputs === | ||
| − | A = | + | A = Sector to clear |
| − | + | ||
| − | + | ||
=== Outputs === | === Outputs === | ||
| − | + | Sector erased | |
=== Destroys === | === Destroys === | ||
* All | * All | ||
| + | |||
| + | === Notes === | ||
| + | This routine actually checks the caller PC address to ensure it was called from a suitable location. A workaround is as follows using the fact that 0000F8 consists of a jump to a ret instruction. | ||
| + | |||
| + | <pre>EraseFlashSector: | ||
| + | ld bc,0000F8h | ||
| + | push bc | ||
| + | jp _EraseFlashSector</pre> | ||
Revision as of 23:49, 25 May 2016
Contents
Synopsis
Hypothesized Official Name: EraseFlashSector
Syscall Address: 0002DCh
Erases an entire sector (64kb) of flash memory. This basically resets the bytes in the sector back to the nominal value of FF.
Inputs
A = Sector to clear
Outputs
Sector erased
Destroys
- All
Notes
This routine actually checks the caller PC address to ensure it was called from a suitable location. A workaround is as follows using the fact that 0000F8 consists of a jump to a ret instruction.
EraseFlashSector: ld bc,0000F8h push bc jp _EraseFlashSector
