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Difference between revisions of "SCUMM/V5 opcodes"
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Fix some v3, v4 variant info
Jestar jokin (talk | contribs) m |
Jestar jokin (talk | contribs) m (Fix some v3, v4 variant info) |
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===Variants=== | ===Variants=== | ||
Small header games only support the parameters used with sub-opcode $01, e.g: | Small header games (v3 and v4) only support the parameters used with sub-opcode $01, e.g: | ||
opcode object[p16] xpos[p16] ypos[p16] | opcode object[p16] xpos[p16] ypos[p16] | ||
Accordingly, they have three parameter bits, and hence more possible opcodes. | Accordingly, they have three parameter bits, and hence more possible opcodes. | ||
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===Variants=== | ===Variants=== | ||
In small header games, the | In small header games, this opcode is used for the "ifState" instruction. | ||
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===Operation=== | ===Operation=== | ||
unless ( | unless (getState(object) != state) goto target | ||
==ifState ($ | ==ifState ($0F) (V3-4)== | ||
This opcode is not present in SCUMM V5. | This opcode is not present in SCUMM V5. | ||
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===Operation=== | ===Operation=== | ||
unless ( | unless (getState(object) == state) goto target | ||
| Line 914: | Line 911: | ||
==oldRoomEffect ($5C) ( | ==oldRoomEffect ($5C) (V3-4)== | ||
This opcode/instruction | This opcode/instruction not present in SCUMM V5. | ||
===Encoding=== | ===Encoding=== | ||
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sub-opcodes: | sub-opcodes: | ||
$03 effect[p16] | $03 effect[p16] | ||
$?? effect[p16] | |||
===Operation=== | ===Operation=== | ||
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==pickupObject ($25)== | ==pickupObject ($25) (v5)== | ||
This instruction is only present in SCUMM V5. | |||
===Encoding=== | ===Encoding=== | ||
| Line 980: | Line 979: | ||
== | ==pickupObject ($50) (V3-4)== | ||
This opcode is not present in SCUMM V5. | This opcode/instruction is not present in SCUMM V5. | ||
===Encoding=== | ===Encoding=== | ||
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opcode arg1[p16] arg2[p16] sub-opcode | opcode arg1[p16] arg2[p16] sub-opcode | ||
Small header games include an extra sub-opcode, $02 (SO_ROOM_COLOR), which adjusts the room's palette: | Small header games (V3 and V4) include an extra sub-opcode, $02 (SO_ROOM_COLOR), which adjusts the room's palette: | ||
opcode $02 colour[p16] index[p16] | opcode $02 colour[p16] index[p16] | ||
... or for V3 games ... | ... or for V3 games ... | ||
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===Variants=== | ===Variants=== | ||
In SCUMM V3 (small header) games, this opcode is used for the WaitForSentence instruction. | In SCUMM V3 and V4 (small header) games, this opcode is used for the WaitForSentence instruction. | ||
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===Operation=== | ===Operation=== | ||
Sets the actor to begin walking to the given object's position. | Sets the actor to begin walking to the given object's position. | ||
=Variables= | =Variables= | ||