Shader Model 1 (Windows)

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Shader Model 1 was the first shader model created in DirectX. It introduced vertex and pixel shaders to the first implementation of the programmable pipeline.

Feature	Capability
Instruction Set	HLSL functions Vertex shader assembly instructions (see Instructions - vs_1_1). Support for pixel shader instructions (ps_1_x) has been deprecated. To compile ps_1_x shaders as ps_2_0 shaders see Compiling Shader Model 1.
Register Set	Vertex shader registers
Vertex Shader Max	128 instructions
Shader Profiles	vs_1_1

For more details on shader model 1, see:

Vertex Shader

Shader Model 1

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