Commit e1a431897164473f7027a7f7d91eaf41abe67fbf
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floppy.img
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second_binary.asm
| @@ -21,6 +21,27 @@ print_char: | @@ -21,6 +21,27 @@ print_char: | ||
| 21 | INT 0x10 ; Signal video interrupt to BIOS | 21 | INT 0x10 ; Signal video interrupt to BIOS |
| 22 | RETN | 22 | RETN |
| 23 | 23 | ||
| 24 | +execute_sector: | ||
| 25 | + PUSH ebp | ||
| 26 | + MOV ebp, esp | ||
| 27 | + PUSH ax | ||
| 28 | + PUSH bx | ||
| 29 | + PUSH cx | ||
| 30 | + PUSH dx | ||
| 31 | + MOV ax, [10 + ebp] ; base address | ||
| 32 | + MOV es, ax | ||
| 33 | + MOV al, [8 + ebp] ; num | ||
| 34 | + MOV cl, [6 + ebp] ; offset | ||
| 35 | + MOV ah, 2 ; Function read | ||
| 36 | + XOR ch, ch ; cylinder | ||
| 37 | + XOR dh, dh ; head | ||
| 38 | + MOV dl, 0x81 ; drive | ||
| 39 | + INT 0x13 | ||
| 40 | + XOR si, si | ||
| 41 | + PUSH es | ||
| 42 | + PUSH bx | ||
| 43 | + RETF | ||
| 44 | + | ||
| 24 | Start: | 45 | Start: |
| 25 | XOR ax, ax | 46 | XOR ax, ax |
| 26 | MOV ds, ax | 47 | MOV ds, ax |
| @@ -30,6 +51,11 @@ XOR bx, bx | @@ -30,6 +51,11 @@ XOR bx, bx | ||
| 30 | for_start_0: | 51 | for_start_0: |
| 31 | MOV si, str | 52 | MOV si, str |
| 32 | CALL print_string | 53 | CALL print_string |
| 54 | + PUSH 0x7c0; Base address, offset is 0 | ||
| 55 | + PUSH 1 ; num | ||
| 56 | + PUSH 1 ; offset | ||
| 57 | + XOR bx, bx; | ||
| 58 | + ;CALL execute_sector | ||
| 33 | ;JMP for_start_0 | 59 | ;JMP for_start_0 |
| 34 | JMP $ | 60 | JMP $ |
| 35 | 61 |
second_binary.bin
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usb.img
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