help with CMOS ports

Can anyone help explain what's going on here?  I'm trying to 
get a very old O/S to load and I think it's looking for
some specialized I/O device, but I'm not certain.

Here's the trace from bochsdbg of the section I'm
unsure about.  Any input would be appreciated.

Thanks.
-Shane

03A0-03AF ---- 1st SDLC (Binary Synchronous Data Link Control adapter)
[1434342] [0x00101bb2] 0a30:1bb2: mov DX, 03af              ; baaf03
[1434343] [0x00101bb5] 0a30:1bb5: mov AL, 00                ; b000
[1434344] [0x00101bb7] 0a30:1bb7: out DX, AL                ; ee

[1434345] [0x00101bb8] 0a30:1bb8: nop                       ; 90
[1434346] [0x00101bb9] 0a30:1bb9: nop                       ; 90

03A3 r/w  on board 8255 mode register
[1434347] [0x00101bba] 0a30:1bba: mov DX, 03a3              ; baa303
[1434348] [0x00101bbd] 0a30:1bbd: mov AL, 98                ; b098
[1434349] [0x00101bbf] 0a30:1bbf: out DX, AL                ; ee

03A1 r/w  on board 8255 port B, external modem interface
[1434350] [0x00101bc0] 0a30:1bc0: mov DX, 03a1              ; baa103
[1434351] [0x00101bc3] 0a30:1bc3: mov AL, 17                ; b017
[1434352] [0x00101bc5] 0a30:1bc5: out DX, AL                ; ee

some sort of busy loop?  sleep?  wait?
[1434353] [0x00101bc6] 0a30:1bc6: call 1bd4                 ; e80b00
[1434354] [0x00101bd4] 0a30:1bd4: mov AX, ffff              ; b8ffff
[1434355] [0x00101bd7] 0a30:1bd7: sub AX, 0001              ; 2d0100
[1434356] [0x00101bda] 0a30:1bda: jnz 1cd7                  ; 75fb
::: repeats until
[1696515] [0x00101bd7] 0a30:1bd7: sub AX, 0001              ; 2d0100
[1696516] [0x00101bda] 0a30:1bda: jnz 1cd7                  ; 75fb
[1696517] [0x00101bdc] 0a30:1bdc: ret_near                  ; c3

03A1 r/w  on board 8255 port B, external modem interface
[1696518] [0x00101bf4] 0a30:1bf4: mov AL, 07                ; b007
[1696519] [0x00101bf6] 0a30:1bf6: out DX, AL                ; ee
[1696520] [0x00101bf7] 0a30:1bf7: out DX, AL                ; ee

[1696521] [0x00101bf8] 0a30:1bf8: mov DX, 0382              ; ba8203
[1696522] [0x00101bfb] 0a30:1bfb: mov AL, 0c                ; b00c
[1696523] [0x00101bfd] 0a30:1bfd: out DX, AL                ; ee
[1696524] [0x00101bfe] 0a30:1bfe: ret_near                  ; c3

[1696525] [0x00101b8d] 0a30:1b8d: mov AX, 0a38              ; b8380a
[1696526] [0x00101b90] 0a30:1b90: mov DS, AX                ; 8ed8

[1696527] [0x00101b92] 0a30:1b92: call 0ad8:0630            ; 9a3006d80a
[1696528] [0x00117880] 0ad8:0630: enter 0008, 00            ; c8080000
[1696529] [0x00117884] 0ad8:0634: les SI, DS:2f5c           ; c4365c2f
[1696530] [0x00117888] 0ad8:0638: cmp ES:[SI+01fd], fc      ; 2680bcfd01fc

suspicious?
[1696531] [0x0011788e] 0ad8:063e: jz 0643                   ; 7403
[1696532] [0x00117890] 0ad8:0640: jmp 06bb                  ; e97800
[1696533] [0x0011790b] 0ad8:06bb: leave                     ; c9
[1696534] [0x0011790c] 0ad8:06bc: ret_far                   ; cb

reset the computer?
[1696535] [0x00101b97] 0a30:1b97: mov AL, fe                ; b0fe
[1696536] [0x00101b99] 0a30:1b99: out 64, AL                ; e664




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