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Add fixes for multiple sectors per cluster

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Byron Lathi
2023-12-08 23:11:52 -08:00
parent 5259fa8e65
commit 0aca4af272
5 changed files with 39 additions and 14 deletions
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13
sw/kernel/filesystems/fat32.s
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@@ -10,7 +10,7 @@
.export _fat32_init
.export _root_cluster, _fat_start_sector, _data_start_sector
.export _fat_size, _sd_buf, _sectors_per_cluster
.export _fat_size, _sd_buf, _sectors_per_cluster, _log2_sectors_per_cluster
.data
@@ -19,6 +19,7 @@ _fat_start_sector: .res 2
_data_start_sector: .res 4
_fat_size: .res 4
_sectors_per_cluster: .res 1
_log2_sectors_per_cluster: .res 1
_sd_buf: .res 512
@@ -52,6 +53,16 @@ root_cluster_offs = _sd_buf + $2C
lda sectors_per_cluster
sta _sectors_per_cluster
ldx #$0
@1: bit #$01
bne L0
inx
lsr
bra @1
L0: txa
sta _log2_sectors_per_cluster
ldx #$00
L1: lda root_cluster_offs,x
sta _root_cluster,x