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ed
2026-08-02 21:58:57 -04:00
parent 858e57f293
commit 9eb696ece8
4 changed files with 175 additions and 15 deletions
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code/hello_joypad/hello_joypad.tape.c
+40 -5
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@@ -199,7 +199,7 @@ internal MipsAtom_(gp_screen_init) atom_info(atom_phase(screen_init), atom_reads
};
enum {
R_PadState = R_T4 atom_reg atom_type(U4),
R_PadInState = R_T4 atom_reg atom_type(U4),
R_PadSignal = R_T0 atom_reg atom_type(U4),
R_CubeRot = R_T1 atom_reg atom_type(V3_S2*),
R_FloorRot = R_T2 atom_reg atom_type(V3_S2*),
@@ -210,15 +210,15 @@ typedef Struct_(Binds_PadInputDemo) {
V3_S2* floor_rot;
};
internal MipsAtom_(pad_input_demo) atom_info(atom_bind(Binds_PadInputDemo)
, atom_reads(R_PadState, R_CubeRot, R_FloorRot)
, atom_reads(R_PadInState, R_CubeRot, R_FloorRot)
, atom_writes(R_CubeRot, R_FloorRot)
) {
load_word(R_PadState, R_TapePtr, O_(Binds_PadInputDemo,pad_state)),
load_word(R_PadInState, R_TapePtr, O_(Binds_PadInputDemo,pad_state)),
load_word(R_CubeRot, R_TapePtr, O_(Binds_PadInputDemo,cube_rot)),
load_word(R_FloorRot, R_TapePtr, O_(Binds_PadInputDemo,floor_rot)),
add_ui_self( R_TapePtr, S_(Binds_PadInputDemo)),
and_i(R_PadSignal, R_PadState, pad0_(Pad_Left)), branch_le_zero(R_PadSignal, atom_offset(pad_left, exit_pad_left)),
and_i(R_PadSignal, R_PadInState, pad0_(Pad_Left)), branch_le_zero(R_PadSignal, atom_offset(pad_left, exit_pad_left)),
load_half( R_T5, R_CubeRot, O_(V3_S2,y)), // BD-Slot occupied
load_half( R_T6, R_FloorRot, O_(V3_S2,y)),
add_si( R_T5, R_T5, 30),
@@ -227,7 +227,7 @@ internal MipsAtom_(pad_input_demo) atom_info(atom_bind(Binds_PadInputDemo)
store_half(R_T6, R_FloorRot, O_(V3_S2,y)),
atom_label(exit_pad_left)
and_i(R_PadSignal, R_PadState, pad0_(Pad_Right)), branch_le_zero(R_PadSignal, atom_offset(pad_right, exit_pad_right)),
and_i(R_PadSignal, R_PadInState, pad0_(Pad_Right)), branch_le_zero(R_PadSignal, atom_offset(pad_right, exit_pad_right)),
load_half( R_T5, R_CubeRot, O_(V3_S2,y)), // BD-Slot occupied
load_half( R_T6, R_FloorRot, O_(V3_S2,y)),
add_si( R_T5, R_T5, -30),
@@ -376,4 +376,39 @@ internal MipsAtom_(sync_primitive_arena) atom_info(atom_bind(Binds_SyncPrimitive
mac_yield()
};
/* ----- pad_sio_init -----
* Boot-time SIO0 init. Caller pins R_T6 = sio_base_addr0.
* Issues SIO CTRL=0x0040 (reset), MODE=0x000D, BAUD=0x0088.
* (Phase 2 fills the body.)
*/
internal MipsAtom_(pad_sio_init) atom_info(atom_phase(pad_init)
, atom_reads(R_T5, R_PadSioBase)
, atom_writes(R_T5)
) {
mac_yield(),
};
/* ----- pad_sio_step -----
* Per-frame bounded raw-SIO transaction. Reads PadState pointers + SIO
* base addresses from Binds_PadSioStep; writes per-port status +
* buttons + axes into smem.pad[0..1]. (Phase 3 fills the body.)
*/
internal MipsAtom_(pad_sio_step) atom_info(atom_bind(Binds_PadSioStep)
, atom_reads(R_TapePtr, R_PadSioBase, R_PadState, R_PadStatus, R_PadCountdown)
, atom_writes(R_PadStatus, R_PadCountdown)
) {
mac_yield(),
};
/* ----- pad_apply_input -----
* Reads pad[0].buttons + pad[0].left_x; applies the input-semantics
* deltas to cube_rot.y + floor_rot.y. (Phase 4 fills the body.)
*/
internal MipsAtom_(pad_apply_input) atom_info(atom_bind(Binds_PadApplyInput)
, atom_reads(R_T0, R_T1, R_T2, R_T5)
, atom_writes(R_T1, R_T2)
) {
mac_yield(),
};
#pragma endregion Baked Atoms