From 03a5882df17ea42aa0b4039173f85ea1e7ce99fe Mon Sep 17 00:00:00 2001
From: Miquel Sabaté Solà <mssola@mssola.com>
Date: Fri, 13 Feb 2026 00:03:07 +0100
Subject: Remove vector.s
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Instead of this, the 'reset' function can go into 'jetpac.s', as we
could consider it's part of the 'main' work. As a bonus, doing this
alignment gives us 3 bytes back from ROM space. Not that we care too
much about space, but it's amusing nonetheless.

The debug scope has been moved into its own file in include/. Admittedly
it's not the most crucial file in the project, but it makes things more
logical and it opens the door to more debugging utilities.

This leaves us with a vector.s file only containing interrupt
code. Thus, it just makes sense to rename it to interrupts.s, which in
the end makes things more organized.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
---
 src/vectors.s | 170 ----------------------------------------------------------
 1 file changed, 170 deletions(-)
 delete mode 100644 src/vectors.s

(limited to 'src/vectors.s')

diff --git a/src/vectors.s b/src/vectors.s
deleted file mode 100644
index e5d1a58..0000000
--- a/src/vectors.s
+++ /dev/null
@@ -1,170 +0,0 @@
-.segment "VECTORS"
-    .addr nmi, reset, irq
-
-.segment "CODE"
-
-;; Debug utilities.
-.scope Debug
-    ;; Counter for frame drops. Only touched when PARTIAL is defined.
-    zp_frame_drops = $90        ; asan:ignore
-.endscope
-
-;; Pretty standard reset function, nothing crazy.
-.proc reset
-    ;; Disable interrupts and decimal mode.
-    sei
-    cld
-
-    ;; Disable APU frame counter.
-    ldx #$40
-    stx APU::m_frame_counter
-
-    ;; Setup the stack.
-    ldx #$FF
-    txs
-
-    ;; Disable NMIs and the APU's DMC.
-    inx
-    stx PPU::m_control
-    stx PPU::m_mask
-    stx APU::m_dmc
-
-    ;; First PPU wait.
-    bit PPU::m_status
-@vblankwait1:
-    bit PPU::m_status
-    bpl @vblankwait1
-
-    ;; Initialize the counter for frame drops before any NMIs can come in.
-    .ifdef PARTIAL
-        lda #0
-        sta Debug::zp_frame_drops
-    .endif
-
-    ;; Reset all sprites by simply moving the Y coordinate out of screen.
-    lda #$EF
-    ldx #0
-@sprite_reset_loop:
-    sta OAM::m_sprites, x
-    inx
-    inx
-    inx
-    inx
-    bne @sprite_reset_loop
-
-    ;; DMA setup for sprite reset.
-    lda #$00
-    sta OAM::m_address
-    lda #$02
-    sta OAM::m_dma
-
-    ;; Second PPU wait. After that the PPU is stable.
-@vblankwait2:
-    bit PPU::m_status
-    bpl @vblankwait2
-
-    ;; NOTE: palettes are not initialized here as it's going to be one of the
-    ;; first things done on `main` code.
-
-    jmp main
-.endproc
-
-.proc nmi
-    ;; Should we skip it?
-    bit Globals::zp_flags
-
-    ;; If we are on a dev environment, account for any frame drops.
-    .ifdef PARTIAL
-        bpl @account_for_frame_drop
-    .else
-        bpl @end
-    .endif
-
-    ;; Save registers.
-    pha
-    txa
-    pha
-    tya
-    pha
-
-    ;; Sprite DMA.
-    lda #$00
-    sta OAM::m_address
-    lda #$02
-    sta OAM::m_dma
-
-    ;; Are we paused? If so skip timers, PAL handler and the likes.
-    lda #%00001000
-    and Globals::zp_flags
-    bne @ppu_registers
-
-    ;; PAL-specific code
-    .ifdef PAL
-        jsr Driver::pal_handler
-    .endif
-
-    ;; TODO: some actions here will depend on the status of the game...
-    lda Globals::zp_flags
-    and #%00000001
-    bne @ppu_registers
-
-    ;; Increase the random seed.
-    inc Prng::zp_rand
-
-    ;; Decrease title timer.
-    lda Title::zp_title_timer
-    beq @ppu_registers
-    dec Title::zp_title_timer
-
-@ppu_registers:
-    ;; Should we update PPU registers?
-    bit Globals::zp_flags
-    bvc @scroll
-
-    ;; Zero out the `ppu` flag.
-    lda #%10111111
-    and Globals::zp_flags
-    sta Globals::zp_flags
-
-    bit PPU::m_status
-
-    ;; Update the PPU control/mask registers with shadowed values.
-    lda PPU::zp_mask
-    sta PPU::m_mask
-    lda PPU::zp_control
-    sta PPU::m_control
-
-@scroll:
-    ;; Always reset the scroll just in case.
-    bit PPU::m_status
-    lda #$00
-    sta PPU::m_scroll
-    sta PPU::m_scroll
-
-    ;; Unblock the main code.
-    lda #%01111111
-    and Globals::zp_flags
-    sta Globals::zp_flags
-
-    ;; Restore registers.
-    pla
-    tay
-    pla
-    tax
-    pla
-
-@end:
-    rti
-
-    ;; If we are on a dev environment, account for any frame drops.
-.ifdef PARTIAL
-@account_for_frame_drop:
-    inc Debug::zp_frame_drops
-    rti
-.endif
-.endproc
-
-;; Unused.
-.proc irq
-    rti
-.endproc
-- 
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