83Plus:Software:usb8x/Asm Interface/MSD/UFI Write - Revision history

Dan Englender at 21:32, 12 September 2006

2006-09-12T21:32:37Z

Brandonw: Forgot input

2006-09-12T00:57:40Z

Forgot input

Brandonw at 07:10, 17 August 2006

2006-08-17T07:10:43Z

Brandonw at 06:57, 17 August 2006

2006-08-17T06:57:37Z

New page

== Synopsis ==
'''Name:''' UFI_Write

'''Minimum usb8x version:''' 0.10

Writes one sector from sector buffer to LBA address in (MSDLBA).

=== Inputs ===
* (MSDLBA) contains LBA address of sector to write

=== Outputs ===
* (MBDLBA) address contains data from sector buffer

=== 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:
<code>
xor a
ld (appBackUpScreen+MSDLBA),a
ld (appBackUpScreen+MSDLBA+1),a
ld (appBackUpScreen+MSDLBA+2),a
ld (appBackUpScreen+MSDLBA+3),a
</code>
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

@@ Line 6: / Line 6: @@
 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

@@ Line 11: / Line 11: @@
 === Outputs ===
 * (MBDLBA) address contains data from sector buffer
 === Destroys ===