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Update MGTK.md

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@ -12,14 +12,14 @@ This is a complex API library written by Apple circa 1985. It consists of:
For the purposes of DeskTop, the entry point is fixed at $4000 AUX, called MLI-style (JSR followed by command type and address of param block).
ca65 syntax is used for primitives: `.byte`, `.word` (interpreted as 16-bit signed integer), `.addr` (16-bit address), `.res N` (N byte buffer)
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# Graphics Primitives
## Concepts
ca65 syntax is used for primitives: `.byte`, `.word` (interpreted as 16-bit signed integer), `.addr` (16-bit address), `.res N` (N byte buffer)
### Point
```
.word xcoord