Re: A85: ZShell to Usgard
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Re: A85: ZShell to Usgard
Yes you can make levels using bits like that, but i imagine most games
use 1 byte for each tile. you cannot read 1 bit from memory at a
time. you must read the entire byte. you can then use the "bit"
instruction to test an individual bit. instructions such as "and" and
"or" are also very useful.
-mike pearce
On Sat, 16 May 1998 23:45:48 -0500, you wrote:
>data1:
> .db %10101010
> .db %01010101
>
>ld hl, (PROGRAM_ADDR)
>ld de, data1
>add hl, de
bit 7,(hl)
jr nz, Label ;jump to label since high bit is 1 (non-zero)
....
Label:
....
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