git.y1.nz

commit ac2326e1b82afb2d2e1d967f2fddbe311730a02c
parent 1f6f10b6fda3b2079e18a01b61ec7042231bfe46
Author: Toxa <untoxa@mail.ru>
Date:   Fri, 19 Aug 2022 23:49:06 +0300

GB: switch off display closer to start

Diffstat:
M
gbdk-lib/libc/targets/sm83/ap/crt0.s
11
+++++------
M
gbdk-lib/libc/targets/sm83/duck/crt0.s
10
+++++-----
M
gbdk-lib/libc/targets/sm83/gb/crt0.s
10
+++++-----

3 files changed, 15 insertions(+), 16 deletions(-)
diff --git a/gbdk-lib/libc/targets/sm83/ap/crt0.s b/gbdk-lib/libc/targets/sm83/ap/crt0.s
@@ -107,7 +107,6 @@ _refresh_OAM::
         JP      .refresh_OAM + (.refresh_OAM_DMA - .start_refresh_OAM)
 
 .clear_WRAM:
-        PUSH    DE
         XOR     A
         LD      BC, #l__DATA
         LD      HL, #s__DATA
@@ -120,7 +119,6 @@ _refresh_OAM::
         LD      L, A
         LD      C, #(40 << 2)   ; 40 entries 4 bytes each
         RST     0x28
-        POP     DE
         RET
 
         ;; GameBoy Header
@@ -192,7 +190,12 @@ _reset::
         ;; Initialize the stack
         LD      SP, #.STACK
 
+        PUSH    DE
+        ;; Turn the screen off
+        CALL    .display_off
+        ;; Clear the static storage
         CALL    .clear_WRAM
+        POP     DE
 
 ;       LD      (.mode),A       ; Clearing (.mode) is performed when clearing RAM
 
@@ -206,10 +209,6 @@ _reset::
         RLA
         LD      (__is_GBA), A
 1$:
-
-        ;; Turn the screen off
-        CALL    .display_off
-
         XOR     A
         ;; Initialize the display
         LDH     (.SCY),A
diff --git a/gbdk-lib/libc/targets/sm83/duck/crt0.s b/gbdk-lib/libc/targets/sm83/duck/crt0.s
@@ -108,7 +108,6 @@ _refresh_OAM::
         JP      .refresh_OAM + (.refresh_OAM_DMA - .start_refresh_OAM)
 
 .clear_WRAM:
-        PUSH    DE
         XOR     A
         LD      BC, #l__DATA
         LD      HL, #s__DATA
@@ -121,7 +120,6 @@ _refresh_OAM::
         LD      L, A
         LD      C, #(40 << 2)   ; 40 entries 4 bytes each
         RST     0x28
-        POP     DE
         RET
 
         .org    0x150
@@ -136,7 +134,12 @@ _reset::
         ;; Initialize the stack
         LD      SP, #.STACK
 
+        PUSH    DE
+        ;; Turn the screen off
+        CALL    .display_off
+        ;; Clear the static storage
         CALL    .clear_WRAM
+        POP     DE
 
 ;       LD      (.mode),A       ; Clearing (.mode) is performed when clearing RAM
 
@@ -146,9 +149,6 @@ _reset::
         XOR     A
         LD      (__is_GBA), A   ; and it is never GBA
 
-        ;; Turn the screen off
-        CALL    .display_off
-
         XOR     A
         ;; Initialize the display
         LDH     (.SCY),A
diff --git a/gbdk-lib/libc/targets/sm83/gb/crt0.s b/gbdk-lib/libc/targets/sm83/gb/crt0.s
@@ -107,7 +107,6 @@ _refresh_OAM::
         JP      .refresh_OAM + (.refresh_OAM_DMA - .start_refresh_OAM)
 
 .clear_WRAM:
-        PUSH    DE
         XOR     A
         LD      BC, #l__DATA
         LD      HL, #s__DATA
@@ -120,7 +119,6 @@ _refresh_OAM::
         LD      L, A
         LD      C, #(40 << 2)   ; 40 entries 4 bytes each
         RST     0x28
-        POP     DE
         RET
         
         ;; GameBoy Header
@@ -198,7 +196,12 @@ _reset::
         ;; Initialize the stack
         LD      SP, #.STACK
 
+        PUSH    DE
+        ;; Turn the screen off
+        CALL    .display_off
+        ;; Clear the static storage
         CALL    .clear_WRAM
+        POP     DE
 
 ;       LD      (.mode),A       ; Clearing (.mode) is performed when clearing RAM
 
@@ -212,9 +215,6 @@ _reset::
         RLA
         LD      (__is_GBA), A
 1$:
-        ;; Turn the screen off
-        CALL    .display_off
-
         XOR     A
         ;; Initialize the display
         LDH     (.SCY),A

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