Epson Research and Development Page 13
Vancouver Design Center
Interfacing to the Toshiba MIPS TX3912 Processor S1D13505
Issue Date: 01/02/05 X23A-G-010-04
4.3 Memory Mapping and Aliasing
The TX3912 uses a portion of the PC Card Attribute and IO space to access t he S1D13505.
The S1D13505 responds to both PC Card Attribute and IO bus accesses, thus freeing the
programmer from having to set the TX3912 Memory Configuration Register 3 bit
CARD1IOEN (or CARD2IOEN if slot 2 is used). As a result, the TX3912 sees the
S1D13505 on its PC Card slot as described in the table below.
Table 4-2: TX3912 to PC Card Slots Address Remapping for Direct Connection
S1D13505 Uses PC Card Slot # Toshiba Address Size Function
1
0800 0000h 16M byte Card 1 IO or Attribute
0900 0000h 8M byte S1D13505 registers,
aliased 4 times at 2M byte intervals
0980 0000h 8M byte S1D13505 display buffer,
aliased 4 times at 2M byte intervals
0A00 0000h 32M byte Card 1 IO or Attribute
6400 0000h 64M byte Card 1 Memory
2
0C00 0000h 16M byte Card 2 IO or Attribute
0D00 0000h 8M byte S1D13505 registers,
aliased 4 times at 2M byte intervals
0D80 0000h 8M byte S1D13505 display buffer,
aliased 4 times at 2M byte intervals
0E00 0000h 32M byte Card 2 IO or Attribute
6800 0000h 64M byte Card 2 Memory