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| 193 | |
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Checkpoint | Beep Code | Description | |
Code | |||
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7Eh |
| The Coprocessor initialization test. Use the | |
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| floating point instructions to determine if a | |
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| coprocessor exists instead of the ET bit in | |
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| CR0. | |
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80h |
| Disable onboard COM and LPT ports before | |
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| testing for presence of external I/O devices. | |
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81h |
| Run late device initialization routines. | |
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82h |
| Test and identify RS232 ports. | |
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83h |
| Configure Fisk Disk Controller. | |
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84h |
| Test and identify parallel ports. | |
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85h |
| Display any ESCD read errors and configure | |
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| all PnP ISA devices. | |
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86h |
| Initialize onboard I/O and BDA according to | |
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| CMOS and presence of external devices. | |
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87h |
| Initialize motherboard configurable devices. | |
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88h |
| Initialize interrupt controller. | |
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89h |
| Enable NMI. | |
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8Ah |
| Initialize Extended BIOS Data Area and ini- | |
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| tialize the mouse. | |
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8Bh |
| Setup interrupt vector and present bit in | |
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| Equipment byte. | |
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8Ch |
| Initialize both of the floppy disks and dis- | |
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| play an error message if failure was | |
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| detected. Check both drives to establish the | |
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| appropriate diskette types in the BIOS data | |
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| area. | |
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8Fh |
| Count the number of ATA drives in the sys- | |
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| tem and update the number in bdaFdis- | |
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| kcount. | |
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