Difference between revisions of "83Plus:Software:usb8x/Asm Interface/MSD/UFI Write"
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Writes one sector from sector buffer to LBA address in (MSDLBA). | Writes one sector from sector buffer to LBA address in (MSDLBA). | ||
| − | === Inputs == | + | === Inputs == |
| + | * DE points to data to be written | ||
* (MSDLBA) contains LBA address of sector to write | * (MSDLBA) contains LBA address of sector to write | ||
=== Outputs === | === Outputs === | ||
| − | |||
* C set if problems | * C set if problems | ||
Revision as of 16:57, 11 September 2006
Synopsis
Name: UFI_Write
Minimum usb8x version: 0.10
Writes one sector from sector buffer to LBA address in (MSDLBA).
= Inputs
- DE points to data to be written
- (MSDLBA) contains LBA address of sector to write
Outputs
- C set if problems
Destroys
- AF, BC, DE, HL
Notes
(MSDLBA) is a 4-byte area in the mass storage driver's internal memory buffer used by this routine. The following example code would set the value to zero, where appBackUpScreen is where the mass storage internal buffer is:
xor a ld (appBackUpScreen+MSDLBA),a ld (appBackUpScreen+MSDLBA+1),a ld (appBackUpScreen+MSDLBA+2),a ld (appBackUpScreen+MSDLBA+3),a
This is just to demonstrate where MSDLBA is in memory. See [[../MSD_Initialize|MSD_Initialize]] for more information about the internal buffer used by the mass storage driver.
See Also
- [[../MSD_Initialize|MSD_Initialize]] - Initializes the mass storage driver
