Just for completeness: on my home-machine I found a file
	-rw-r--r--  1 bertram  users  40829 Jul  9  1997  vsbus.c
with the followign lines:

struct confargs ka420_devs[] = {
        /* name         intslot intpri intvec   intbit  ioaddr  */
        { "dc",         7,      7,      0x2C0,  (1<<7), KA420_SER_BASE,
                        6,      6,      0x2C4,  (1<<6), 0x01,           },
        { "dc (xmit)",  6,      6,      0x2C4,  (1<<6), KA420_SER_BASE, },
        { "le",         5,      5,      0x250,  (1<<5), KA420_LAN_BASE,
                        KA420_NWA_BASE, 0x00,                           },
        { "ncr",        1,      1,      0x3F8,  (1<<1), KA420_SC1_BASE,
                        KA420_SC1_DADR, KA420_SC1_DCNT, KA420_SC1_DDIR,
                        KA420_DMA_BASE, KA420_DMA_SIZE, 0x01,   0x06,   },
        { "ncr",        0,      0,      0x3FC,  (1<<0), KA420_SC2_BASE,
                        KA420_SC2_DADR, KA420_SC2_DCNT, KA420_SC2_DDIR,
                        KA420_DMA_BASE, KA420_DMA_SIZE, 0x01,   0x06,   },
        { "" },
};

Ciao,
	bertram

PS: I also found "ka420.h" dated Oct 14  1996, so what's the prob?

PPS: from the beginning booting from SCSI worked only via "rom()/netbsd"