Table of Contents
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Dual Port
RAM
Capacity
8k bytes
16k bytes
24k bytes
32k bytes
16k bytes
32k bytes
48k bytes
64k bytes
32k bytes
64k bytes
96k bytes
128k bytes
64k bytes
128k bytes
192k bytes
256k bytes
PROGRAMMING INFORMATION
Table 3-2.
RAM Address Range Configuration
Local Addresses
06000H to 07FFFH
04000H to 07FFFH
02000H to 07FFFH
OOOOOH to 07FFFH
OCOOOH to OFFFFH
08000H to OFFFFH
04000H to OFFFFH
OOOOOH to OFFFFH
18000H to 1FFFFH
10000H to 1FFFFH
08000H to 1FFFFH
OOOOOH to 1FFFFH
38000H to 3FFFFH
20000H to 3FFFFH
18000H to 3FFFFH
OOOOOH to 3FFFFH
Type of Board Configuration
iSBC 86/14 Board
iSBC 86/14 Board
iSBC 86/14 Board
iSBC 86/14 Board
iSBC 86/14 Board with iSBC 300A Multimodule
iSBC 86/14 Board with iSBC 300A Multimodule
iSBC 86/14 Board with iSBC 300A Multimodule
iSBC 86/14 Board with iSBC 300A MultimodulE
iSBC 86/30 Board
iSBC 86/30 Board
iSBC 86/30 Board
iSBC 86/30 Board
iSBC 86/30 Board with iSBC 304 Multimodule
iSBC 86/30 Board with iSBC 304 Multimodule
iSBC 86/30 Board with iSBC 304 Multimodule
iSBC 86/30 Board with iSBC 304 Multimodule
NOTES: The iSBC 86/14 board requires the iSBC 300A
RAM
Expansion
Multimodule Board; the iSBC 86/30 board requires the iSBC 304
RAM
Expansion Multimodule board.
3-4.
I/O ADDRESSING
The on-board 8086-2 CPU communicates with the programmable devices and
other I/O devices via I/O READ and I/O WRITE commands that are issued to
the I/O port address assigned to that particular device.
Each I/O device
is
assigned one (and in some cases, more than one) I/O port address
through which data, commands, and status are transferred.
Table 3-3
lists all of the legal I/O port addresses for the iSBC 86/14/30 board.
In
addition to the programmable devices, the iSBC 86/14/30 board contains
some other devices, such as a status latch and an edge-sensitive
interrupt sensing circuit, that are also assigned I/O port addresses.
3-5
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