sd:isa
Differences
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| sd:isa [2026/04/23 05:15] – appledog | sd:isa [2026/04/23 06:30] (current) – appledog | ||
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| | 99 | [[# | | 99 | [[# | ||
| + | <wrap #skpc /> | ||
| + | **'' | ||
| <wrap #pab /> | <wrap #pab /> | ||
| - | < | + | **'' |
| - | Pack the low 4 bits of AL and BL into AL. This is useful for BCD and 4bpp video mode. | + | < |
| Start: | Start: | ||
| [....llll][....hhhh] | [....llll][....hhhh] | ||
| Line 282: | Line 283: | ||
| <wrap #uab /> | <wrap #uab /> | ||
| - | **''# | + | **''# |
| + | Unpack the 8 bits in AL into AL and BL and zeroes the four high bits of AL and BL. | ||
| + | This is useful for BCD and 4bpp video mode. | ||
| < | < | ||
| - | Unpack the 8 bits in AL into AL and BL and zeroes the four high bits of AL and BL. This is useful for BCD and 4bpp video mode. | ||
| - | |||
| Start: | Start: | ||
| [hhhhllll][........] | [hhhhllll][........] | ||
| Line 292: | Line 294: | ||
| [0000llll][0000hhhh] | [0000llll][0000hhhh] | ||
| </ | </ | ||
| - | |||
| - | <WRAP mycode> this **is** . | ||
| - | |||
| <wrap #case /> | <wrap #case /> | ||
sd/isa.1776921315.txt.gz · Last modified: by appledog
