DOCUMENT ID: 0916-02 SYNOPSIS: IBM token ring is recognized by MDB floppy but not by the OS OS RELEASE: 2.1, 2.4 PRODUCT: Solaris x86 KEYWORDS: IBM token ring MDB floppy shared memory address DESCRIPTION: The IBM token ring card is recognized by the MDB floppy but not by the operating system. Other operating systems recognize and drive the card. SOLUTION: The MDB floppy "booting function" real mode driver probes for shared memory addresses at any address. The operating system has different requirements. The memory address span of the card is expected to be 24k bytes. The /kernel/drv/tr.conf file memory addresses have 8k subtracted to derive the actual address. Three bus types are accommodated by this series of cards. The Micro Channel Architecture (MCA) requires no special attention. ISA card memory address is set on the token ring circuit card via six dip switches designated as m1 through m6. Switch m1 is the low order. Any address set on the dip switches must have m1 and m6 in the "off" position. EISA cards are setup with ECU program. The address consists of a ROM address and a 16k memory address with must be coordinated to be continuous. Two vendors IBM AND 3COM produce similar cards. The dip switches on the card are designated: sw1 1 m1 sw2 1 primary/ secondary sw1 2 m2 sw2 2 16k shared ram size sw1 3 m3 sw2 3 sw1 4 m4 sw2 4 4 Mbps sw1 5 m5 sw2 5 16 bit mode sw1 6 m6 sw1 7 irq1 sw1 8 irq2 ------------------------------------------- ROM Location address (ISA and EISA) ------------------------------------------- 0xC2000 0xD2000 0xC6000 0xD6000 0xCA000 0xDA000 0xCE000 DATE APPROVED: 09/25/95