參數(shù)資料
型號: TP6508
英文描述: Pushbutton Switch; Actuator Diameter:0.078"; Circuitry:6PDT; Switch Operation:6 Changeover Push-Push; Contact Current Max:100mA; Leaded Process Compatible:Yes; Mounting Type:PCB; Switch Function:6PDT
中文描述: 顯卡
文件頁數(shù): 66/134頁
文件大?。?/td> 600K
代理商: TP6508
P.63
Extended Indexed Register SREG DE : Color Key Mask Register 1
This is a read/write register.
Port address is Hex 3C5.
Default value after hardware reset is Hex 00.
D0-7 Color compare mask bit 8 to 15
Bit 0-7
These bits are used to select which bits of the background video data stream are used in the comparsion
with the color compare data bit 0 to 23. This register control bits 8 to 15.
Extended Indexed Register SREG DF : Color Key Mask Register 2
This is a read/write register.
Port address is Hex 3C5.
Default value after hardware reset is Hex 00.
D0-7 Color compare mask bit 16 to 23
Bit 0-7
These bits are used to select which bits of the background video data stream are used in the comparsion
with the color compare data bit 0 to 23. This register control bits 16 to 23.
Extended Indexed Register SREG F0 : Graphics Engine Port Address Low Register
This is a read only register.
Port address is Hex 3C5.
Default value after hardware reset is Hex F1.
D0-7 Graphics engine port address bit 2 to 9
Bit 0
-7
TP6508 Graphics Engine control registers are accessed at Port binary address
xxxx,xxYY,YYYY,YY00. These bits are used to determine the low address value - 'Y..' and they are
set default hex. F1. The high address value - 'x..' is determined by Graphics Engine control registers
indexed value. For example, as default value hex. F1, BITBLT Source X Offset Reg. port address at
hex. 07C4.
Extended Indexed Register SREG F1 : Linear Addressing Register
This is a read/write register.
Port address is Hex 3C5.
Default value after hardware reset is Hex 00.
D0-7 Base address bit 0 to 7
Bit 0-7
When SREG C0 bit-2 was set to logical 1 , then these bits would use to do as LA20 to LA27. IBM
compatible display address uses low base 1M address bit 0 to 19 and locates at Hex A0000 to AFFFF
or Hex B0000 to BFFFF. We can set these bits to relocate display address at upper high 255M
memory address.
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