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Ñòóäåíòàì > Ðåôåðàòû > Âû÷èñëèòåëüíûå ìàøèíû è ñèñòåìû, 2 ñåìåñòð

Âû÷èñëèòåëüíûå ìàøèíû è ñèñòåìû, 2 ñåìåñòð

Ñòðàíèöà: 8/8

                          │ ┌──────────────────┤           │

                          │ │ Sec.Blue         │ Drive     │

                          │ │ ┌────────────────┤           │

                          │ │ │ Red            │ Video     │

                          │ │ │ ┌──────────────┤           │

                          │ │ │ │ Green        │ Out       │

                          │ │ │ │ ┌────────────┤           │

                          │ │ │ │ │ Blue       │           │

                          │ │ │ │ │ ┌──────────┤           │

┌──────┐                  │ │ │ │ │ │          │           │

│      ├──┐ ┌────────────┬┴┬┴┬┴┬┴┬┴┬┴┬─┐       └───────────┘

│Video │  │ │        00h │1│0│0│1│0│1│ │

│Shift ├─┐└─┤ A0      ∙  └┬┴┬┴┬┴┬┴┬┴┬┘ │

│Regis-├┐└──┤ A1      ∙   │ │ │ │ │ │  │

│ter   │└───┤ A2      ∙  ┌┴┬┴┬┴┬┴┬┴┬┴┐ │

│      ├────┤ A3     /Fh │0│1│1│0│0│1│ │

│      │    │            └─┴─┴─┴─┴─┴─┘ │

└──────┘    └──────────────────────────┘

             Attributes Controller Palette

 

     Âûõîä èç ïàëèòðû áóäåò òàêèì:

 

For A3-0 = 00h:ONS.Red            For A3-0 = OFh:OFFS.Red

           OOFS.Green                        ONS.Green

           OFFS.Blue                         ONS.Blue

           ONRed                             OFFRed

           OFFGreen                          OFFGreen

           ONBlue                            ONBlue

.

    COLOR PLANE ENABLE:

 

┌──────────────────────────────────────────────────────┐

│   INDEX = 12h Color Plane Enable                     │

├──────────────────────────────────────────────────────┤

│    BIT 7 6 5 4 3 2 1 0                               │

│        │ │ │ │ │ │ │ │                               │

│        │ │ │ │ └─┴─┴─┴──── Enable Color Plane        │

│        │ │ └─┴──────────── Video Status MUX          │

│        └─┴──────────────── Not Used                  │

│                                                      │

└──────────────────────────────────────────────────────┘

 

    ENABLE COLOR PLANE

    D3 -  D0

    1         Äàííûå ñîîòâåòñòâóþùåé Video Memory plane

              (plane 3-0) ïðèìåíÿþòñÿ ê ïàëèòðå öâåòîâ.

    0         Âûõîä ïàëèòðû öâåòîâ ñîåäèíÿåòñÿ ñ logic 0.

 

    VIDEO STATUS MUX:

      D5  D4    Ýòè áèòû âûáèðàþò 2 èç 6 öâåòîâûõ âûõîäà äëÿ

                Status Port (ñì. ïîðòû 3BAh, 3DAh áèòû D5 è

                D4).

                   Status Port

                       D5               D4

      0   0           Red             Blue

      0   1          S.Red           S.Green

      1   0          S.Blue           Green

      1   1         Not Used         Not Used

 

 

    HORIZONTAL PICTURE ELEMENT PANNING:

 

┌──────────────────────────────────────────────────────┐

│   INDEX = 13h Horizontal Pel Panning                 │

├──────────────────────────────────────────────────────┤

│    BIT 7 6 5 4 3 2 1 0                               │

│        │ │ │ │ │ │ │ │                               │

│        │ │ │ │ └─┴─┴─┴──── Horizontal Pel Panning    │

│        └─┴─┴─┴──────────── Not Used                  │

│                                                      │

└──────────────────────────────────────────────────────┘

 

    HORIZONTAL PEL PANNING

      D3 - D0    Ýòîò ðåãèñòð èñïîëüçóåòñÿ äëÿ ãîðèçîíòàëüíîé

                 ïðîêðóòêè. Â 8 Pels íà character modes ýòîò

                 ðåãèñòð îáû÷íî ïðîãðàììèðóåèñÿ ñî çíà÷åíèåì

                 0. Îòîáðàæàåìîå çíà÷åíèå ñìåùàåòñÿ âëåâî

                 îïðåäåëåííûì ÷èñëîì òî÷åê ðàñòðà,

                 îïðåäåëÿåìûì ñ ïîìîùüþ ýòîãî ðåãèñòðà.

                 Ìàêñèìàëüíî ðàçðåøàåòñÿ 7.  9 òî÷êàõ íà

                 character modes ýòîò ðåãèñòð îáû÷íî

                 ïðîãðàììèðóåòñÿ ñî çíà÷åíèåì 8.

                 Ïðîãðàììèðîâàíèå çíà÷åíèé 0-7 áóäåò âñå

                 áîëüøå ñìåùàòü èçîáðàæåíèå âëåâî.



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Äàòà ïóáëèêàöèè: 2004-09-01 (109 Ïðî÷òåíî)