bslathi19/cc65
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

fixed issues found by gregg

Browse Source
This commit is contained in:
mrdudz
2015-07-15 13:18:12 +02:00
parent ac27ed301a
commit c3d45e4c47
8 changed files with 76 additions and 99 deletions
Download Patch File Download Diff File Expand all files Collapse all files

84
libsrc/pce/crt0.s
View File

@@ -30,11 +30,6 @@
.importzp sp
.importzp ptr1,ptr2
; ------------------------------------------------------------------------
; Create an empty LOWCODE segment to avoid linker warnings
.segment "LOWCODE"
; ------------------------------------------------------------------------
; Place the startup code in a special segment.
@@ -42,7 +37,7 @@
start:
; setup the CPU and System-IRQ
; setup the CPU and System-IRQ
; Initialize CPU
@@ -96,58 +91,55 @@ start:
cli
; Clear the BSS data
jsr zerobss
jsr zerobss
; Copy the .data segment to RAM
lda #<(__DATA_LOAD__)
sta ptr1
lda #>(__DATA_LOAD__)
sta ptr1+1
lda #<(__DATA_RUN__)
sta ptr2
lda #>(__DATA_RUN__)
sta ptr2+1
lda #<(__DATA_LOAD__)
sta ptr1
lda #>(__DATA_LOAD__)
sta ptr1+1
lda #<(__DATA_RUN__)
sta ptr2
lda #>(__DATA_RUN__)
sta ptr2+1
ldx #>(__DATA_SIZE__)
ldx #>(__DATA_SIZE__)
@l2:
beq @s1 ; no more full pages
beq @s1 ; no more full pages
; copy one page
ldy #0
ldy #0
@l1:
lda (ptr1),y
sta (ptr2),y
lda (ptr1),y
sta (ptr2),y
iny
bne @l1
bne @l1
inc ptr1+1
inc ptr2+1
inc ptr1+1
inc ptr2+1
dex
bne @l2
bne @l2
; copy remaining bytes
@s1:
; copy one page
ldy #0
ldy #0
@l3:
lda (ptr1),y
sta (ptr2),y
lda (ptr1),y
sta (ptr2),y
iny
cpy #<(__DATA_SIZE__)
bne @l3
cpy #<(__DATA_SIZE__)
bne @l3
; setup the stack
lda #<(__RAM_START__+__RAM_SIZE__)
sta sp
lda #>(__RAM_START__+__RAM_SIZE__)
sta sp+1
; Init the Heap
jsr initheap
lda #<(__RAM_START__+__RAM_SIZE__)
sta sp
lda #>(__RAM_START__+__RAM_SIZE__)
sta sp+1
; Call module constructors
jsr initlib
jsr initlib
; Pass an empty command line
jsr push0 ; argc
@@ -158,7 +150,7 @@ start:
; Call module destructors. This is also the _exit entry.
_exit:
jsr donelib ; Run module destructors
jsr donelib ; Run module destructors
; reset the PCEngine (start over)
jmp start
@@ -174,16 +166,16 @@ _irq1:
phy
inc tickcount
bne @s1
inc tickcount+1
bne @s1
inc tickcount+2
bne @s1
inc tickcount+3
inc tickcount
bne @s1
inc tickcount+1
bne @s1
inc tickcount+2
bne @s1
inc tickcount+3
@s1:
; Acknowlege interrupt
ldaio VDC_CTRL
lda a:VDC_CTRL
ply
plx