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| author | Miquel Sabaté Solà <mssola@mssola.com> | 2025-12-10 14:41:35 +0100 |
|---|---|---|
| committer | Miquel Sabaté Solà <mssola@mssola.com> | 2025-12-15 15:31:06 +0100 |
| commit | 74b1003ab8abad2f8220de4f2f18a3b118f23f01 (patch) | |
| tree | b7f2d491d708fa900d4dd9649eb5bd7fab3e8686 /include/joypad.s | |
| parent | e6d9bd9f7acfd0e40025b2d579a7faff0d04ef0a (diff) | |
| download | jetpac.nes-74b1003ab8abad2f8220de4f2f18a3b118f23f01.tar.gz jetpac.nes-74b1003ab8abad2f8220de4f2f18a3b118f23f01.zip | |
Adapt the code to play well with nasm's asan
The address sanitizer from nasm provides quite a few goodies, so let's
adapt the code more to it to benefit from those.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Diffstat (limited to 'include/joypad.s')
| -rw-r--r-- | include/joypad.s | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/include/joypad.s b/include/joypad.s index 141877f..f7268e8 100644 --- a/include/joypad.s +++ b/include/joypad.s @@ -10,8 +10,8 @@ BUTTON_RIGHT = 1 << 0 ;; Port addresses for controllers. - JOYPAD1 = $4016 - JOYPAD2 = $4017 + m_joypad1 = $4016 + ;; m_joypad2 = $4017 ;; After running a `read_*` function these two variables will contain the ;; given result. @@ -49,14 +49,14 @@ .proc unsafe_read_x ;; Start the latch process. lda #$01 - sta Joypad::JOYPAD1 + sta Joypad::m_joypad1 sta Joypad::zp_buttons1, x ; Bit as a guard for the loop below. lsr - sta Joypad::JOYPAD1 + sta Joypad::m_joypad1 ;; Now the joypad is ready to accept reads. @loop: - lda Joypad::JOYPAD1, x + lda Joypad::m_joypad1, x and #%00000011 ; Ignore bits other than controller. cmp #$01 ; Set carry if and only if nonzero. rol Joypad::zp_buttons1, x ; Carry -> bit 0; bit 7 -> Carry |