Toshiba Portégé 650CT User Manual page 430

The following table lists the Portégé 650CT computer's DMA
channel assignments.
DMA Status
0 Available
1 Available
2 Reserved 3.5-inch diskette drive (Internal SelectBay,
3 Available
4 Reserved Cascade from DMA Controller 1
5 Available
6 Available
7 Available
Input/Output Address Assignments
The CPU accesses input/output devices, such as modems, by read-
ing from them or writing to them. Each command to read or write
must specify the address (in memory). Each device that communi-
cates with the CPU must have a unique I/O address.
The following table lists the device names and their assigned I/O
addresses for the Portégé 650CT computer.
Input/Output address (I/O) in hex Device/Function
00-0F, 81-83, 87, 89-8B, 8F,
C0-DF
20-21, A0-A1
24-25, 2E-2F, E0-EF, 80,
84-86, 88, 8C-8E, B0-B2,
1882-1885, 1888-88D, 480-48F,
CF8-CFF
Part III: Appendixes
System Resources
Input/Output Address Assignments
Device/Notes
External FDD or Desk Station V Plus
SelectBay)
Resources are always reserved even when
drive is not installed.
Direct Memory Access Controller
(DMAC)
Programmable Interrupt Controller (PIC)
Special Purpose Registers
(Toshiba specific)
457