cleanups and add more comments

[cc65] / libsrc / c128 / irq.s

diff --git a/libsrc/c128/irq.s b/libsrc/c128/irq.s
index d468eeaaab741e2d0c43ca69ee7560be74ea5275..aed1f3a2595085dbaaaf2eabe117c7ab24e5b29c 100644 (file)
--- a/libsrc/c128/irq.s
+++ b/libsrc/c128/irq.s
@@ -2,38 +2,38 @@
 ; IRQ handling (C128 version)
 ;
 
-       .export         initirq, doneirq
-       .import         callirq
+        .export         initirq, doneirq
+        .import         callirq
 
-       .include        "c128.inc"
+        .include        "c128.inc"
 
-IRQInd = $2FD          ; JMP $0000 - used as indirect IRQ vector
+IRQInd  = $2FD          ; JMP $0000 - used as indirect IRQ vector
 
 ; ------------------------------------------------------------------------
 
-.segment       "INIT"
+.segment        "INIT"
 
 initirq:
-       lda     IRQVec
-       ldx     IRQVec+1
-       sta     IRQInd+1
-       stx     IRQInd+2
-       lda     #<IRQStub
-       ldx     #>IRQStub
-       jmp     setvec
+        lda     IRQVec
+        ldx     IRQVec+1
+        sta     IRQInd+1
+        stx     IRQInd+2
+        lda     #<IRQStub
+        ldx     #>IRQStub
+        jmp     setvec
 
 ; ------------------------------------------------------------------------
 
 .code
 
 doneirq:
-       lda     IRQInd+1
-       ldx     IRQInd+2
-setvec:        sei
-       sta     IRQVec
-       stx     IRQVec+1
-       cli
-       rts
+        lda     IRQInd+1
+        ldx     IRQInd+2
+setvec: sei
+        sta     IRQVec
+        stx     IRQVec+1
+        cli
+        rts
 
 ; ------------------------------------------------------------------------
 ; The C128 has ROM parallel to the RAM starting from $4000. The startup code
@@ -45,15 +45,15 @@ setvec:     sei
 ; placed just above the startup code, so it goes into a RAM area that is
 ; not banked.
 
-.segment       "LOWCODE"
+.segment        "LOWCODE"
 
 IRQStub:
-       cld                             ; Just to be sure
-       lda     MMU_CR                  ; Get old register value
-       pha                             ; And save on stack
-       lda     #MMU_CFG_CC65           ; Bank 0 with kernal ROM
-       sta     MMU_CR
-       jsr     callirq                 ; Call the functions
-       pla                             ; Get old register value
-       sta     MMU_CR
-       jmp     IRQInd                  ; Jump to the saved IRQ vector
+        cld                             ; Just to be sure
+        lda     MMU_CR                  ; Get old register value
+        pha                             ; And save on stack
+        lda     #MMU_CFG_CC65           ; Bank 0 with kernal ROM
+        sta     MMU_CR
+        jsr     callirq                 ; Call the functions
+        pla                             ; Get old register value
+        sta     MMU_CR
+        jmp     IRQInd                  ; Jump to the saved IRQ vector