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initial work on a macro to call read_disk_raw

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Elaina Claus
2024-10-13 16:37:52 -04:00
parent 3693eca940
commit f51d8b4142
1 changed files with 23 additions and 0 deletions
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23
include/BIOS/func/ext_read.nasm
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@@ -36,6 +36,29 @@ struc LBAPkt_t
.lower_lba resd 1 .lower_lba resd 1
.upper_lba resd 1 .upper_lba resd 1
endstruc endstruc
; call_read_disk_raw <word segment> <word offset> <dword lba> <word count> <word drive_num>
%macro call_read_disk_raw 5
movzx ax, %5
push ax ; drive_num
movzx ax, %4
push ax ; count
movzx dword eax, %3
push dword eax ; lba
movzx ax, %2
push ax ; offset
movzx ax, %1
push ax ; segment = 0
; uint8_t read_stage2_raw(uint16_t buf_segment, uint16_t buf_offset,
; uint32_t lba,
; uint16_t count, uint16_t drive_num)
call read_disk_raw
add sp, 0xC
%endmacro
; Wrapper for AH=0x42 INT13h (Extended Read) ; Wrapper for AH=0x42 INT13h (Extended Read)
; ;