From 7882e4474b77dfe4036f170cfce0e40b4f10ae93 Mon Sep 17 00:00:00 2001
From: Miquel Sabaté Solà <mikisabate@gmail.com>
Date: Fri, 10 Jan 2025 12:49:15 +0100
Subject: tests: Bundle end-to-end tests into a tarball
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This way I can simply compress all the examples to traverse with a
single file, and thus no longer polluting this repository from code from
other repositories.

Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
---
 tests/src/shared/joypad.s | 86 -----------------------------------------------
 1 file changed, 86 deletions(-)
 delete mode 100644 tests/src/shared/joypad.s

(limited to 'tests/src/shared/joypad.s')

diff --git a/tests/src/shared/joypad.s b/tests/src/shared/joypad.s
deleted file mode 100644
index afd0a68..0000000
--- a/tests/src/shared/joypad.s
+++ /dev/null
@@ -1,86 +0,0 @@
-;; Taken from https://github.com/mssola/code.nes.
-
-.scope Joypad
-    ;; Button masks.
-    BUTTON_A      = 1 << 7
-    BUTTON_B      = 1 << 6
-    BUTTON_SELECT = 1 << 5
-    BUTTON_START  = 1 << 4
-    BUTTON_UP     = 1 << 3
-    BUTTON_DOWN   = 1 << 2
-    BUTTON_LEFT   = 1 << 1
-    BUTTON_RIGHT  = 1 << 0
-
-    ;; Port addresses for controllers.
-    JOYPAD1 = $4016
-    JOYPAD2 = $4017
-
-    ;; After running a `joypad_read_*` function these two variables will contain
-    ;; the given result.
-    m_buttons1 = $22
-    m_buttons2 = $23
-.endscope
-
-;;;
-;; Read the first joypad. This method is fast but it might be vulnerable to the
-;; DPCM bug (see: https://www.nesdev.org/wiki/Controller_reading_code).
-joypad_unsafe_read:
-    ldx #$00
-    ;; NOTE: fallthrough
-
-;;;
-;; Read the joypad as indexed by the X register (0 for controller 1; 1 for
-;; controller 2). This method is fast but it might be vulnerable to the DPCM bug
-;; (see: https://www.nesdev.org/wiki/Controller_reading_code).
-joypad_unsafe_read_x:
-    ;; Start the latch process.
-    lda #$01
-    sta Joypad::JOYPAD1
-    sta Joypad::m_buttons1, x   ; Bit as a guard for the loop below.
-    lsr a
-    sta Joypad::JOYPAD1
-
-    ;; Now the joypad is ready to accept reads.
-@joypad_unsafe_read_x_loop:
-    lda Joypad::JOYPAD1, x
-    and #%00000011              ; Ignore bits other than controller.
-    cmp #$01                    ; Set carry if and only if nonzero.
-    rol Joypad::m_buttons1, x   ; Carry -> bit 0; bit 7 -> Carry
-    bcc @joypad_unsafe_read_x_loop
-    rts
-
-;;;
-;; Safely read the first controller via a re-read algorithm.
-joypad_read:
-    ldx #$00
-
-    ;; NOTE: uncomment these two lines to also read safely the second
-    ;; controller.
-    ;;
-    ;; jsr joypad_read_x
-    ;; inx
-
-    ;; NOTE: fallthrough
-
-;;;
-;; Safely read via a re-read algorithm the joypad as indexed by the X register
-;; (0 for controller 1; 1 for controller 2).
-joypad_read_x:
-    jsr joypad_unsafe_read_x
-
-    ;; The main idea around a re-read algorithm is that you read the controller
-    ;; "unsafely" once, then you do it again and compare both reads. If they
-    ;; were the same then we are on the safe side. Otherwise we would need to
-    ;; loop until we get two identical reads. This sounds bad but in practice
-    ;; it's not so much (and hey, if it worked for Super Mario Bros. 3, it
-    ;; should work for us too :P). Otherwise there is the algorithm via OAM DMA,
-    ;; but it sure is tricky.
-@joypad_read_x_reread:
-    lda Joypad::m_buttons1, x
-    pha
-    jsr joypad_unsafe_read_x
-    pla
-    cmp Joypad::m_buttons1, x
-    bne @joypad_read_x_reread
-
-    rts
-- 
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