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Use constants for screen width and height.

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This commit is contained in:
Stephan Mühlstrasser 2015-02-12 20:54:47 +01:00
parent 5063e0ecca
commit 679f5aa675
7 changed files with 10 additions and 18 deletions
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2
cfg/osic1p.cfg
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@ -7,7 +7,7 @@ SYMBOLS {
}
MEMORY {
# for size of ZP see runtime/zeropage.s and c1p/extzp.s
ZP: file = "", define = yes, start = $0002, size = $001A + $0006;
ZP: file = "", define = yes, start = $0002, size = $001A + $0005;
RAM: file = %O, define = yes, start = %S, size = __HIMEM__ - __STACKSIZE__ - %S;
}
SEGMENTS {

8
libsrc/osic1p/_scrsize.s
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@ -10,12 +10,10 @@
.export screensize
.include "extzp.inc"
.include "osic1p.inc"
.proc screensize
ldx SCR_LINELEN
inx ; Variable is one less
ldy #25
ldx #(SCR_LINELEN + 1)
ldy #(SCR_HEIGHT + 1)
rts
.endproc

4
libsrc/osic1p/cputc.s
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@ -35,7 +35,7 @@ cputdirect:
; Advance cursor position
advance:
cpy SCR_LINELEN ; xsize-1
cpy #SCR_LINELEN ; xsize-1
bne L3
jsr newline ; new line
ldy #$FF ; + cr
@ -46,7 +46,7 @@ L3: iny
newline:
inc CURS_Y
lda CURS_Y
cmp #24 ; screen height 25 lines hardcoded
cmp #SCR_HEIGHT ; screen height
bne plot
lda #0 ; wrap around to line 0
sta CURS_Y

7
libsrc/osic1p/crt0.s
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@ -28,13 +28,6 @@ _init: ldx #$FF ; Initialize stack pointer to $01FF
txs
cld ; Clear decimal mode
; ---------------------------------------------------------------------------
; Initialize screen width
; TODO: Can initialization be done in a more idiomatic way?
; TODO: Create function for changing screen width
lda #$18
sta SCR_LINELEN
; ---------------------------------------------------------------------------
; Set cc65 argument stack pointer

2
libsrc/osic1p/extzp.inc
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@ -4,4 +4,4 @@
; ------------------------------------------------------------------------
.globalzp CURS_X, CURS_Y, CURS_SAV, SCR_LINELEN, SCREEN_PTR
.globalzp CURS_X, CURS_Y, CURS_SAV, SCREEN_PTR

3
libsrc/osic1p/extzp.s
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@ -14,8 +14,7 @@
CURS_X: .byte 0
CURS_Y: .byte 0
CURS_SAV: .byte 0
SCR_LINELEN: .byte 24
SCREEN_PTR: .res 2
; size 6
; size 5
; Adjust size of this segment in osic1p.cfg if the size changes

2
libsrc/osic1p/osic1p.inc
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@ -5,3 +5,5 @@ RESET := $FF00 ; Reset address, show boot prompt
; Other definitions
VIDEORAMSIZE = $0400 ; Size of C1P video RAM (1 kB)
SCR_LINELEN = $18 ; screen width - 1
SCR_HEIGHT = $18 ; screen height - 1