1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
;
; Startup code for cc65 (supervision version)
;
.export _exit
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import _main
.import initlib, donelib, copydata
.import zerobss
.import __RAM_START__, __RAM_SIZE__ ; Linker generated
.import __STACKSIZE__ ; Linker generated
.include "zeropage.inc"
.include "supervision.inc"
.export _sv_irq_timer_counter, _sv_irq_dma_counter
.export _sv_nmi_counter
.bss
_sv_irq_dma_counter: .byte 0
_sv_irq_timer_counter: .byte 0
_sv_nmi_counter: .byte 0
.code
reset:
jsr zerobss
; Initialize data.
jsr copydata
lda #<(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
ldx #>(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
sta sp
stx sp+1 ; Set argument stack ptr
jsr initlib
jsr _main
_exit: jsr donelib
exit: jmp exit
.proc irq
pha
lda sv_irq_source
and #SV_IRQ_REQUEST_TIMER
beq not_timer
lda sv_timer_quit
inc _sv_irq_timer_counter
not_timer:
lda sv_irq_source
and #SV_IRQ_REQUEST_DMA
beq not_dma
lda sv_dma_quit
inc _sv_irq_dma_counter
not_dma:
pla
rti
.endproc
.proc nmi
inc _sv_nmi_counter
rti
.endproc
; Removing this segment gives only a warning.
.segment "FFF0"
.proc reset32kcode
lda #(6<<5) | SV_LCD_ON | SV_NMI_ENABLE_ON
sta sv_bank
; Now, the 32Kbyte image can reside in the top of 64Kbyte and 128Kbyte ROMs.
jmp reset
.endproc
.segment "VECTOR"
.word nmi
.word reset32kcode
.word irq
|
