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fixed screensize, timertick, revers mode

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This commit is contained in:
mrdudz
2015-07-16 16:00:32 +02:00
parent 1414411bba
commit 21ef6b8510
8 changed files with 86 additions and 27 deletions
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9
libsrc/pce/scrsize.s → libsrc/pce/_scrsize.s
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@@ -1,9 +1,10 @@
;
; Screen size variables
;
.include "pce.inc"
.export _screensize
_screensize:
.export screensize
screensize:
ldx xsize
ldy ysize
rts
@@ -13,5 +14,5 @@ _screensize:
.rodata
.export xsize, ysize
xsize: .byte 64
ysize: .byte 28
xsize: .byte charsperline
ysize: .byte screenrows

33
libsrc/pce/conio.s
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@@ -51,7 +51,7 @@ set_palette:
;
;----------------------------------------------------------------------------
.importzp ptr1
.importzp ptr1, tmp1
conio_init:
; Load font
st0 #VDC_MAWR
@@ -65,10 +65,35 @@ conio_init:
sta ptr1+1
st0 #VDC_VWR ; VWR
lda #0
sta tmp1
jsr copy
lda #<font
sta ptr1
lda #>font
sta ptr1+1
lda #$ff
sta tmp1
jsr copy
ldx #0
stx BGCOLOR
inx
stx CHARCOLOR
rts
copy:
ldy #$80 ; 128 chars
charloop: ldx #$08 ; 8 bytes/char
lineloop:
lda (ptr1)
eor tmp1
sta a:VDC_DATA_LO ; bitplane 0
stz a:VDC_DATA_HI ; bitplane 1
@@ -89,12 +114,6 @@ fillloop: st1 #$00
dey
bne charloop ; next character
ldx #0
stx BGCOLOR
inx
stx CHARCOLOR
rts
.rodata

3
libsrc/pce/cputc.s
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@@ -7,6 +7,7 @@
.export newline, plot
.import popa, _gotoxy
.import PLOT
.import xsize
.importzp tmp3,tmp4
@@ -38,7 +39,7 @@ cputdirect:
advance:
ldy CURS_X
iny
cpy #xsize
cpy xsize
bne L3
jsr newline ; new line
ldy #0 ; + cr

5
libsrc/pce/readme.txt
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@@ -6,16 +6,11 @@ joystick support should get verified on real hw
- the masks for buttons may be wrong.
- 6 button gamepads are different and need slightly different code
revers() is a dummy function, actual reverse output is not supported yet
some graphical petscii chars should get added to the charset
interruptor support in crt0 (and cfg) is missing
- clock() should be hooked to a VBL interrupt
conio lacks support for different screen sizes, which could be used with
different video modes
--------------------------------------------------------------------------------
a good emulator to use for PC-Engine is "mednafen" (mednafen.sourceforge.net)

24
libsrc/pce/revers.s
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@@ -1,10 +1,24 @@
; FIXME: actual revers output is not supported yet
.include "pce.inc"
.export _revers
_revers:
lda #0
rts
.export _revers
.proc _revers
ldx #$00 ; Assume revers off
tay ; Test onoff
beq L1 ; Jump if off
ldx #$80 ; Load on value
ldy #$00 ; Assume old value is zero
L1: lda RVS ; Load old value
stx RVS ; Set new value
beq L2 ; Jump if old value zero
iny ; Make old value = 1
L2: ldx #$00 ; Load high byte of result
tya ; Load low byte, set CC
rts
.endproc
;-------------------------------------------------------------------------------
; force the init constructor to be imported