IF-2560 (ICM)

SCSI I / F for the SCSI dedicated slot of PC-9801FA / FS / FX and MATE-A. There are two types of new and old,
The new version called MATE compatible version is written in gray on the bracket (bracket on the back of the board) as M compatible
A round white paper sticker is attached.The boards are both REV. B, but the IC at U6 is
The older version is AMI 9232 LAI 18CV 8 SC-25, while the MATE version is the AMD PALCE 16 V 8 H-15 SC / 4 234 KMLV
Of the 761 (or 7 1) 2560V string is additionally printed on the package (or
It has been changed to PALCE16V8H-15SC / 4 243MRMR with the addition of the character string of 2761 V).
Furthermore, in the MATE compatible version, many jumpers are added on the substrate.ICM is this MATE compatible version
The Windows 95 was officially supported.

The upper limit of recognition capacity of this board using e10chk.exe which is free software created by Mr. Marimo Mr.
As a result, we have obtained the result that there is a wall of 2015 MB for both MATE version and non-MATE version.

There are two 8-deep dip switches and one 4-deep dip switch on the board.

・ 8-station dip switch SW1: SCSI ID, interrupt level, DMA channel setting
1-2-3: SCSI ID setting
　OFF-OFF-OFF 0
　ON-OFF-OFF 1
　OFF-ON-OFF 2
　ON-ON-OFF 3
　OFF-OFF-ON 4
　ON-OFF-ON 5
　OFF-ON-ON 6
　ON-ON-ON 7 (default setting)
4-5-6: Setting interrupt level
　OFF-OFF-OFF INT 0 (factory setting)
　ON-OFF-OFF INT 1
　OFF-ON-OFF INT 2
　ON-ON-OFF INT 3
　ON-OFF-ON INT 5
　OFF-ON-ON INT 6
7-8: DMA channel setting
　OFF-OFF ■ Ch 0
　ON-ON Ch 3 (default setting)
　※ In FIFO mode, DMA is not used at the time of data transfer but commands such as status etc.
    Use DMA at runtime.
　※ When DMA channel is set to Ch0, system setup menu of main unit
    You can assign Ch0 or Ch1 to the channel of this I / F.

・ 8 stations dip switch SW2: Setting of main unit model, ROM valid / decoupled
1-2-3-4-5-6-7: Setting of main unit model
　Mate-A which is not equipped with OFF-ON-ON-xx-ON-ON PC-9801FA / FS / FX and high res board
　OFF-ON-ON-OFF-ON-OFF-ON ■ mate-A equipped with high res board
8: ROM enable / disable setting
　ON Active (default setting)
　OFF ■ Release

・ 4 stations dip switch SW3: I / O port address, transfer mode setting
1-2: I / O port address setting
　ON-ON CCxh (default setting)
　OFF-ON CDxh
　ON-OFF CExh
　OFF-OFF CFxh
3: Transfer mode setting
　ON W-FIFO transfer (default setting)
　OFF DMA transfer
4: Not used (Factory setting: ON)