Programming the Flash ROM, Continued
S772P.ROM S772P.ROM resides on a floppy disk and contains the updated main BIOS code. American Megatrends will provide this file when the AMIBIOS for the Apollo IV ISA motherboard must be updated.
S772P.ROM must be present in the root directory of the floppy disk before the onboard Flash EPROM can be reprogrammed. The file that has the main BIOS code must be named S772P.ROM.
Sequence of Operation The sequence of operation and expected behavior of the bootblock BIOS code is:
| Step | Expected behavior |
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1 | Look for floppy | The system beeps one time before the BIOS attempts to read from |
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disk. | floppy drive A:. |
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2 | Look for | S772P.ROM must be in the root directory of the floppy disk in |
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S772P.ROM on the | drive A:. There is no beep if successful. |
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floppy disk. |
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3 | Read the floppy | The floppy disk is read. There is no beep if this step is successful. |
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disk. |
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4 | Check for BIOS file | The BIOS file size is checked. There is no beep if this step is |
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size. | successful. |
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5 | Check for Flash | The BIOS looks for an Intel |
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EPROM. | not beep if this step is successful. |
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6 | Erase the Flash | Two beeps sound when the BIOS begins erasing the Flash |
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EPROM. | EPROM. |
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7 | Program the Flash | Three beeps sound when the AMIFlash Code begins |
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EPROM. | reprogramming the Flash EPROM. |
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8 | Continue | Four beeps sound when reprogramming has been successfully |
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programming the | completed. |
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Flash EPROM. |
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9 | AMIFlash does a | A CPU reset is generated to reboot the computer. |
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reset. |
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66Apollo IV PCI Pentium ISA Motherboard User’s Guide
