GD9924BE V2模擬量模塊,ABB如何使用
磁盤驅(qū)動(dòng)器控制器ISASIO器件采用PS/2兼容的低密度和高密度器件與可選外部磁盤驅(qū)動(dòng)器一起使用的磁盤驅(qū)動(dòng)器控制器。驅(qū)動(dòng)器通過基板連接器J4與ISASIO控制器接口，該連接器繼電器電源和控制信號(hào)。ISASIO磁盤驅(qū)動(dòng)器控制器與DP8473、765A、，和通常用于實(shí)現(xiàn)軟盤控制器的N82077設(shè)備。
GD9924BE V2模擬量模塊為這些設(shè)備編寫的軟件可以在不改變操作的情況下使用ISASIO控制器。ISASIO設(shè)備可用于支持任何以下設(shè)備：? 31/2英寸1.44MB軟盤驅(qū)動(dòng)器? 51/4英寸1.2MB軟盤驅(qū)動(dòng)器
? 標(biāo)準(zhǔn)250kbps至2Mbps磁帶機(jī)系統(tǒng)鍵盤和鼠標(biāo)界面國(guó)家半導(dǎo)體PC87308 ISASIO芯片用于實(shí)現(xiàn)P2和前面板輸入/輸出的某些部分提供基于ROM的鍵盤和鼠標(biāo)界面控制。的前面板MVME2603/2604板有兩個(gè)6針圓形DIN連接器，用于鍵盤和鼠標(biāo)連接。
PCI-ISA橋（PIB）控制器MVME2603/2604使用Winbond W83C553橋接控制器來提供PCI本地總線和ISA系統(tǒng)輸入/輸出總線之間的接口（如第1章硬件準(zhǔn)備和安裝）。PIB控制器提供以下功能：? PCI總線仲裁：–ISA（工業(yè)標(biāo)準(zhǔn)架構(gòu)）總線DMA–PHB（PCI主機(jī)橋）MPU/本地總線接口功能，由Raven ASIC實(shí)現(xiàn)–所有車載PCI設(shè)備–PMC（PCI夾層卡）插槽? DMA的ISA（工業(yè)標(biāo)準(zhǔn)架構(gòu)）總線仲裁設(shè)備
? 四個(gè)PCI中斷的ISA中斷映射
? 中斷控制器功能支持14個(gè)ISA中斷
? ISA中斷的邊緣/電平控制
? 七個(gè)獨(dú)立可編程DMA通道
? 一個(gè)16位計(jì)時(shí)器
? 三個(gè)間隔計(jì)數(shù)器/計(jì)時(shí)器
Disk Drive Controller
The ISASIO device incorporates a PS/2-compatible low- and high-density
disk drive controller for use with an optional external disk drive. The drive
interfaces with the ISASIO controller via base board connector J4, which
relays both power and control signals.
The ISASIO disk drive controller is compatible with the DP8473, 765A,
and N82077 devices commonly used to implement floppy disk controllers.
Software written for those devices may be used without change to operate
the ISASIO controller. The ISASIO device may be used to support any of
the following devices:
? 31
/2-inch 1.44MB floppy disk drive
? 51
/4-inch 1.2MB floppy disk drive
? Standard 250kbps to 2Mbps tape drive system
Keyboard and Mouse Interface
The National Semiconductor PC87308 ISASIO chip used to implement
certain segments of the P2 and front-panel I/O provides ROM-based
keyboard and mouse interface control. The front panel of the
MVME2603/2604 board has two 6-pin circular DIN connectors for the
keyboard and mouse connections.
PCI-ISA Bridge (PIB) Controller
The MVME2603/2604 uses a Winbond W83C553 bridge controller to
supply the interface between the PCI local bus and the ISA system I/O bus
(diagrammed in Figure 1-1 in Chapter 1, Hardware Preparation and
Installation).The PIB controller provides the following functions:
? PCI bus arbitration for:
– ISA (Industry Standard Architecture) bus DMA
– The PHB (PCI Host Bridge) MPU/local bus interface function,
implemented by the Raven ASIC
– All on-board PCI devices
– The PMC (PCI Mezzanine Card) slot
? ISA (Industry Standard Architecture) bus arbitration for DMA
devices
? ISA interrupt mapping for four PCI interrupts
? Interrupt controller functionality to support 14 ISA interrupts
? Edge/level control for ISA interrupts
? Seven independently programmable DMA channels
? One 16-bit timer
? Three interval counters/timers
