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| 型号： | HIF_SPEC |
| 英文描述： | EZ-030 Demonstration Board Theory of Operation Host Interface (HIF) Specification |
| 中文描述： | 易- 030演示板的经营理论主机接口（诱导因子）规格 |
| 文件页数： | 17/118页 |
| 文件大小： | 356K |
| 代理商： | HIF_SPEC |
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Host Interface (HIF) Specification
1–7
Implementation Types
Implementations of the HIF specification take two fundamental forms:
self-hosted and embedded.
The SA-29200 , SA-29240 and SD-29240 are some of AMD’s single-board
computers that incorporate microcontrollers, program and data memory. Serial
ports and timer-counter resources are resident in the microcontroller. In the
case of the SA-29200, the Am29200 processor is used. In the case of the
SA-29240 and SD-29240 boards, one of the Am2924
x
microcontrollers is used.
The HIF implementation for these boards includes a resident
osboot
program
that is programmed into ROM at low-memory locations and implements the
kernel services described in the “HIF Service Routines” chapter of this
document.
In contrast to the single-board computers, the EB29K and EB29030 tools are
two of AMD’s add-in boards for IBM PC-compatible computers. The EB29K
and EB29030 boards incorporate an Am29000 or Am29030 processor, program
and data memory, and PC dual-interface memory resources. The HIF
implementation for these boards consists of two portions of code. One portion
performs some of the kernel services on the board and the other portion
performs some of the kernel services through the auspices of the DOS
operating system. In the sense that the HIF is grafted onto the existing host
operating system, it is called an embedded implementation. The architectural
and instruction simulators are also embedded implementations because they
share the HIF implementation between custom code and existing host-computer
operating-system code.
There is no preference for either type of implementation as long as the services
and features of the HIF specification are fully implemented in the target
environment. With the standard interfaces that a HIF implementation presents,
application programs written for one environment will run equally well in
another.
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