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If a new network-board is installed and configured, Windows98 installs as default protocol TCP/IP, configured to automatically obtain an IP-address:
If you do NOT specify yourself the IP-address or you have a DHCP-server on your network, Windows98 will take longer (a lot longer) to boot, but it did assign an IP-address to the network-card, as can be verified with "winipcfg":
The article Q188480 in the Microsoft Knowledge Base (http://support.microsoft.com/support/kb/articles/q188/4/80.asp), which also points to the file "\tools\mtsutil\mtsutils.txt" on your Windows98 CD-ROM), has the following explanation:
| TCP/IP IP AUTOCONFIGURATION ================================================== The Windows 98 TCP/IP stack supports a new mechanism for automatic address assignment of IP addresses for simple LAN-based network configurations. IP Autoconfiguration Addressing is an extension of dynamic IP address assignment for LAN adapters. It enables configuration of IP addresses without using static IP address assignment or installing a Dynamic Host Configuration Protocol DHCP) server. If a network LAN adapter is configured for TCP/IP, and if "Obtain an IP address automatically" is selected on the IP Address tab in the TCP/IP Properties dialog box, Windows 98 TCP/IP attempts to find and use a DHCP service on the attached network to obtain a dynamically assigned IP address. If it does not find a DHCP service, Windows 98 uses IP Autoconfiguration Addressing by assigning the adapter an Class B IP address out of the network number 169.254.x.x IP address space. In this way, two PCs can be plugged into a LAN hub and can start without any IP address configuration, and can use TCP/IP networking for internetworking. Each computer that uses IP Autoconfiguration Addressing gets an IP address and tests to determine that the IP address is unique and not already in use on the LAN. IP Autoconfiguration Addressing is enabled by default. IP Autoconfiguration Addressing can be controlled by setting the value of IPAutoconfigurationEnabled (type DWORD) in the registry key HKEY_LOCAL_MACHINE\System \CurrentControlSet\Services\VXD\DHCP If the value of IPAutoconfigurationEnabled is nonzero or if the registry key is absent, IP Autoconfiguration Addressing is enabled. An IPAutoconfigurationEnabled value of 0 disables the IP Autoconfiguration Addressing feature. If Windows 98 initially does not detect a DHCP service and configures an IP Autoconfiguration IP address, and then it subsequently discovers a DHCP service on the network, Windows 98 uses the DHCP service and switches from 169.254.x.x addressing to IP addresses assigned by a DHCP server. |
I do not know (or did find anywhere info) on how Windows98 assigns the TCP/IP-address.
I verified also the procedures listed in the article Q188480 and the file "mtsutils.txt" on switching off/on this IP-AutoConfiguration, the required install-files "ipac_off.inf" and "ipac_on.inf" are also on the Windows98 CD-ROM:
I had a look in the registry and located the key: