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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST92196A датащи(PDF) 147 Page - STMicroelectronics |
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ST92196A датащи(HTML) 147 Page - STMicroelectronics |
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147 / 268 page  147/268 - ON SCREEN DISPLAY CONTROLLER (OSD) OSD CONTROLLER (Cont’d) 8.5.8.7 Extended Parallel Mode In extended parallel mode, each character code (1 byte) is followed by a palette attribute (1 byte) and a shape attribute (1 byte). Refer to Figure 59. Let’s assume that the start address of the current row buffer is 2p (even address). The character codes are stored in the OSDRAM at the address 2p+3+3z, the palette attributes are stored at the address 2p+4+3z, and the shape at- tributes are stored at the address 2p+5+3z, where z range value is 1 to RCN (RCN is the row charac- ter count defined in Section 8.5.8.2). The character code structure, using the shape at- tribute, allows you to point to any of the font ROM characters. The shape attribute definition depends on the font matrix used for the row (it depends on the FM bit, see Section 8.5.8.3). CHARACTER CODE IN EXTENDED PARALLEL MODE Address in segment 22h: 2p+3+3z. See Figure 59. Bits 7:0 = CHC[7:0] Character Code in extended parallel mode The CHC[7:0] bits are used, combined with 3 or 1 bits of the shape attribute (for a 9x13 or 18x26 ma- trix), to point to any of the characters stored in the font ROM (refer to the shape attribute description for more details). PALETTE ATTRIBUTE Address in segment 22h: 2p+4+3z. See Figure 59. Refer to Section 8.5.8.6 for the bit description. 70 CHC7 CHC6 CHC5 CHC4 CHC3 CHC2 CHC1 CHC0 70 FP3 FP2 FP1 FP0 BP3 BP2 BP1 BP0 |
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