| Line | |
|---|
| 1 | /* set to 16 bit mode (80x86 begin in real mode) text section to 0 */
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| 2 | .code16
|
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| 3 | .text
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| 4 | .org 0x00
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| 5 |
|
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| 6 | .global _start
|
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| 7 | _start:
|
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| 8 | mov $0x07C0,%ax
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| 9 | mov %ax,%ds
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| 10 |
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| 11 | call booting
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| 12 | xor %dx,%dx /* test if dx == 0 */
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| 13 | call working
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| 14 | call idleloop
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| 15 | ret
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| 16 |
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| 17 | booting:
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| 18 | mov $boot,%si
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| 19 | call message
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| 20 | call nl
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| 21 | ret
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| 22 |
|
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| 23 | message:
|
|---|
| 24 | cld /* set direction to increment */
|
|---|
| 25 | lodsb
|
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| 26 | or %al,%al
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| 27 | jz done
|
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| 28 | mov $0xE,%ah
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| 29 | mov $7,%bx
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| 30 | int $0x10
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| 31 | jmp message
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| 32 |
|
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| 33 | done:
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| 34 | ret
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| 35 |
|
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| 36 | nl:
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| 37 | mov $newline,%si
|
|---|
| 38 | call message
|
|---|
| 39 | ret
|
|---|
| 40 |
|
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| 41 | working:
|
|---|
| 42 | call nl
|
|---|
| 43 | call nl
|
|---|
| 44 | mov $device,%si
|
|---|
| 45 | call message
|
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| 46 | call waitenter
|
|---|
| 47 | inc %dx
|
|---|
| 48 | cmp $3,%dx
|
|---|
| 49 | je keyboard
|
|---|
| 50 | jmp working
|
|---|
| 51 |
|
|---|
| 52 | waitenter:
|
|---|
| 53 | call nl
|
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| 54 | movw $cont,%si
|
|---|
| 55 | call message
|
|---|
| 56 | xor %ax,%ax /* Sets AH=0 and AL=0 */
|
|---|
| 57 | int $0x16 /* Wait for keypress */
|
|---|
| 58 | cmp 'T',%al
|
|---|
| 59 | jz taz
|
|---|
| 60 | cmp 't',%al
|
|---|
| 61 | jz taz
|
|---|
| 62 | cmp $13,%al
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| 63 | jnz waitenter
|
|---|
| 64 | ret
|
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| 65 |
|
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| 66 | keyboard:
|
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| 67 | call nl
|
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| 68 | call nl
|
|---|
| 69 | movw $kbd,%si
|
|---|
| 70 | call message
|
|---|
| 71 | call nl
|
|---|
| 72 | movw cont,%si
|
|---|
| 73 | call message
|
|---|
| 74 | ret
|
|---|
| 75 |
|
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| 76 | taz:
|
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| 77 | call nl
|
|---|
| 78 | call nl
|
|---|
| 79 | movw tazq,%si
|
|---|
| 80 | call message
|
|---|
| 81 | jmp waitenter
|
|---|
| 82 |
|
|---|
| 83 | idleloop:
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| 84 | hlt
|
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| 85 | jmp idleloop
|
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| 86 |
|
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| 87 | boot:
|
|---|
| 88 | .ascii "Loading UniOS 1.1 Beta..."
|
|---|
| 89 | newline:
|
|---|
| 90 | .byte 10, 13, 0
|
|---|
| 91 | device:
|
|---|
| 92 | .ascii "Device not responding to SCSI command."
|
|---|
| 93 | cont:
|
|---|
| 94 | .ascii "Hit ENTER to continue..."
|
|---|
| 95 | kbd:
|
|---|
| 96 | .ascii "Keyboard not responding to SCSI command."
|
|---|
| 97 | tazq:
|
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| 98 | .ascii "Yes, TazQ is an Internet crack monkey on wheels."
|
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| 99 |
|
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| 100 | /* Fill with zero until boottag */
|
|---|
| 101 | padlen:
|
|---|
| 102 | .byte boottag - .
|
|---|
| 103 |
|
|---|
| 104 | .fill 10,1,0
|
|---|
| 105 | /* times 510-($-$$) db 0 */
|
|---|
| 106 |
|
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| 107 | .org 510
|
|---|
| 108 | boottag:
|
|---|
| 109 | .word 0xAA55
|
|---|
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