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Update Architecture.md

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Can you please check and confirm that upper 32k limitation has now been removed. I think the limitation is that you  cant/shouldnt cross a boundary. Sorry if I'm wrong on that.
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b1ackmai1er
2020-12-11 20:21:45 +08:00
parent 681432ff4d
commit bf313e7c43
1 changed files with 7 additions and 7 deletions
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Source/Doc/Architecture.md
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@@ -587,7 +587,7 @@ _Id_ | _Device Type / Driver_
Disk Input/Output (DIO)
-----------------------
Character input/output functions require that a character unit be specified
Disk input/output functions require that a disk unit be specified
in the C register. This is the logical disk unit number assigned during
the boot process that identifies all disk i/o devices uniquely.
@@ -613,11 +613,12 @@ MID\_HDNEW | 10 | Hard Disk with 1024 Directory entries
| _Entry Parameters_
| B: 0x10
| C: Disk Device Unit ID
| _Exit Results_
| A: Status (0=OK, else error)
### Function 0x11 -- Disk Status (DIORESET)
### Function 0x11 -- Disk Reset (DIORESET)
| _Entry Parameters_
| B: 0x11
@@ -668,6 +669,7 @@ determine if the device supports LBA addressing.
| _Entry Parameters_
| B: 0x13
| C: Disk Device Unit ID
| D: Bank ID
| E: Block Count
| HL: Buffer Address
@@ -683,14 +685,14 @@ read. On error, current sector is sector where error occurred.
Blocks read indicates number of sectors successfully read.
Caller must ensure: 1) buffer address is large enough to contain data for
all sectors requested, and 2) entire buffer area resides in upper 32K of
memory.
all sectors requested, and 2) does not cross a 32k memory bank boundary.
### Function 0x14 -- Disk Write (DIOWRITE)
| _Entry Parameters_
| B: 0x14
| C: Disk Device Unit ID
| D: Bank ID
| E: Block Count
| HL: Buffer Address
@@ -705,9 +707,7 @@ function. Current sector is incremented after each sector successfully
written. On error, current sector is sector where error occurred.
Blocks written indicates number of sectors successfully written.
Caller must ensure: 1) buffer address is large enough to contain data for
all sectors being written, and 2) entire buffer area resides in upper 32K
of memory.
Caller must ensure the source buffer does not cross a 32k memory bank boundary.
### Function 0x15 -- Disk Verify (DIOVERIFY)