IF-55TF (TEAC)

PC-9801FA / FS / FX, PC-9821Ae / As / Ap / Af / As2 / Ap2 / An / As3 / Ap3 for SCSI only
SCSI board to fire into the slot.Two 8-deep dip switches and 4-deep on the board
There is one dip switch.

・ 8-station dip switch SW1: SCSI-ID, interrupt level, DMA channel setting
1-2-3: SCSI-ID setting
　0FF-0FF-0FF: ID = 0
  OFF-OFF-ON: ID = 1
  OFF-ON-OFF: ID = 2
  OFF-ON-ON: ID = 3
  ON-OFF-OFF: ID = 4
  ON-OFF-ON: ID = 5
  ON-ON-OFF: ID = 6
  ON-ON-ON: ID = 7 (factory 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
  OFF-OFF-ON: INT 5
  ON-OFF-ON: INT 6
7-8: DMA channel setting
　OFF-OFF: DMA # 0
  OFF-ON: DMA # 2
  ON-OFF: DMA OFF (default setting)
  ON-ON: DMA # 3

・ 8 stations dip switch SW2: Local memory address, setting of main unit model
1-2-3: Local memory address (normal) setting
　OFF-OFF-OFF: D0000h to D0FFFh
　ON-OFF-OFF: D2000h to D2FFFh
　OFF-ON-OFF: D4000h to D4FFFh
　ON-ON-OFF: D6000h to D6FFFh
　OFF-OFF-ON: D 8000 h to D 8 FFF h
　ON-OFF-ON: DA000h to DAFFFh
　OFF-ON-ON: DC000h to DCFFFh (factory setting)
　ON-ON-ON: DE 000 h to DEFFF h
4-5: Setting of local memory address (high res)
　OFF-OFF: E8000h to E8FFFh
　ON-OFF: EA000h to EAFFFh
　OFF-ON: EC000h to ECFFFh (factory setting)
　ON-ON: EE000h to EEFFFh
6-7: Setting of machine model
　OFF-OFF: Setting prohibited (Even originally for high res dedicated machines)
  ON-OFF: Setting prohibited (The setting originally for the 8086 / V30 machine)
　OFF-ON: mate-A equipped with high res board
　ON-ON: Model in normal mode (factory setting)
8: Do not change (factory setting ON)

· 4 stations dip switch SW3: I / O port address, transfer mode, HDD access
　Display mode setting
1-2: I / O port address setting
　OFF-OFF: CCxh (factory setting)
　ON-OFF: CDxh
　OFF-ON: CExh
　ON-ON: CFxh
  (x represents 0, 2, 4)
3: Transfer mode setting
　ON: I / O transfer (factory setting)
　OFF: DMA transfer
4: HDD access display mode setting
　ON: ON (factory setting)
　OFF: OFF