March 1, 1994
                                                           Impress Corporation


             "UNDOCUMENTED 9801/9821 Vol.1 BIOS/Interrupt Edition"


About this disk

This disk contains almost all of the contents of this book in text file format.

When you want to search this book by keywords such as model name or function,
rather than by function number, please use a text editor or file viewer.

●About the scope of use

The files stored on the included disk are protected by copyright law.

The use of these files is permitted only for personal use by the person who
purchased this book.

In this book, almost all of the information in the main text is stored on the
disk in text format to make it easier to search for information. It is easy to
extract parts or even copy the entire content.

This is because we trust the morals of our readers and prioritize convenience.
Please do not copy it to others. In particular, please do not repost it on
BBS.

If you find this book useful and would like to share this information with a
friend, please encourage them to purchase a copy of this book.

●Contents of each file

The following table lists all the files on the included disk and their
contents. All files are stored in the root directory in normal text format,
without compression.

readme.doc              This file (Notes about disks)
int00t17.txt            CPU exceptions, external interrupts ……………………INT 00-17h
int18kb.txt             Keyboard BIOS ………………………………………………………………………………INT 18h
int18crt.txt            CRT BIOS ……………………………………………………………………………………………INT 18h
int18grp.txt            Graphics BIOS (normal) ………………………………………………………INT 18h
int19bio.txt            RS-232C BIOS …………………………………………………………………………………INT 19h
int19drv.txt            RS-232C (AUX driver) ……………………………………………………………INT 19h
int1a00.txt             CMT BIOS ……………………………………………………………………………………………INT 19h
int1a10.txt             Printer BIOS …………………………………………………………………………………INT 1Ah
int1a80.txt             PCMCIA socket services ………………………………………………………INT 1Ah
int1b_f.txt             Disk BIOS (FD) ……………………………………………………………………………INT 1Bh
int1b_2d.txt            Disk BIOS (320KB FD) ……………………………………………………………INT 1Bh
int1b_h.txt             Disk BIOS (HD) ……………………………………………………………………………INT 1Bh
int1b_et.txt            Disk BIOS (other) ……………………………………………………………………INT 1Bh
int1b_s.txt             SCSI interface common BIOS ……………………………………………INT 1Bh
int1c.txt               Calendar/Interval timer BIOS ………………………………………INT 1Ch
int1dhr.txt             Graphic BIOS (Hi-Res) …………………………………………………………INT 1Dh
int1dlt.txt             Graphic BIOS (PC-98LT・HA) ……………………………………………INT 1Dh
int1e.txt               N88/N80BASIC entry …………………………………………………………………INT 1Eh,1Fh
int1f80.txt             Extended functions …………………………………………………………………INT 1Fh
int1fa0.txt             Extended Functions …………………………………………………………………INT 1Fh
int1fc0.txt             Extended Functions …………………………………………………………………INT 1Fh
int20tff.txt            OS/User-defined Interrupts ……………………………………………INT 20〜FFh
intd1.txt               GP-IB BIOS ………………………………………………………………………………………INT D1h
intd2.txt               Sound BIOS ………………………………………………………………………………………INT D2h
intd3.txt               BRANCH4670 BIOS …………………………………………………………………………INT D3h
intdc.txt               MS-DOS Extended Function Calls …………………………………INT DCh
intdcfep.txt            Japanese Input Extended Functions …………………………INT DCh