Apple-2gs-SW
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xrick2gs
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This commit is contained in:
dwsJason 2018-09-01 15:03:23 -04:00
parent 86aa76b8c5
commit 197f2854d0
2 changed files with 46 additions and 8 deletions
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45
asm/blit.s
View File

@ -185,7 +185,7 @@ dp ds 2
* *
* void DrawRect(short x, short y, short width, short height) * void BlitRect(short x, short y, short width, short height)
* *
BlitRect start BLITCODE BlitRect start BLITCODE
@ -221,6 +221,7 @@ stackFix equ 9
lsr a lsr a
lsr a lsr a
sta inputW,s sta inputW,s
sta loopW
clc clc
lda inputY,s lda inputY,s
@ -231,28 +232,43 @@ stackFix equ 9
lsr a lsr a
lsr a lsr a
sta inputH,s sta inputH,s
sta loopH
lda inputY,s lda inputY,s
and #~3 and #~3
lsr a lsr a
lsr a lsr a
sta inputY,s sta inputY,s
sta loopY
tay tay
lda inputX,s lda inputX,s
and #~3 and #~3
tax tax
sta inputX,s ; maybe don't need this sta inputX,s ; maybe don't need this
sta loopX
*---------------------------------------
sei
_shadowON
_auxON
*---------------------------------------
*
* We're messing with the stack, and the DP
* so operationally, we can't use these things
* for variables, or for call returns
*
* *
* Outter loop, once for each Y * Outter loop, once for each Y
* *
YLOOP ANOP YLOOP ANOP
lda inputX,s lda loopX
sta tempX sta tempX
lda inputW,s lda loopW
sta tempW sta tempW
XLOOP ANOP ; Inner Loop, for each X Block XLOOP ANOP ; Inner Loop, for each X Block
@ -279,13 +295,14 @@ BRET anop ; Blit Return
lda tempW lda tempW
bne XLOOP bne XLOOP
lda inputH,s dec loopH
dec a
bmi done bmi done
sta inputH,s
iny ; next direct page iny ; next direct page
iny iny
* TODO, every 4 lines or so (or every so many clocks)
* re-enable interrupts, for audio, and the heartbeat
bra YLOOP bra YLOOP
@ -299,6 +316,13 @@ done ANOP
lda stack lda stack
tcs tcs
*---------------------------------------
_auxOFF
_shadowOFF
cli
*---------------------------------------
* Patchup the Stack so we can return * Patchup the Stack so we can return
lda 3,s lda 3,s
@ -310,7 +334,12 @@ done ANOP
rtl rtl
*------------------------------------------------------------------------------- *-------------------------------------------------------------------------------
tempX ds 2 ; inner X tempX ds 2 ; inner X
tempW ds 2 ; inner W tempW ds 2 ; inner W
* Local bank copies of our stack variables
loopX ds 2
loopY ds 2
loopW ds 2
loopH ds 2
stack ds 2 ; stack register stack ds 2 ; stack register
dp ds 2 ; dp register dp ds 2 ; dp register

9
include/system.h
View File

@ -174,6 +174,9 @@ extern void sysjoy_shutdown(void);
#endif #endif
#ifdef IIGS #ifdef IIGS
// GS Hardware Registers
extern volatile char *VIDEO_REGISTER;
// GS Specific Stuff // GS Specific Stuff
extern int LZ4_Unpack(char* pDest, char* pPackedSource); extern int LZ4_Unpack(char* pDest, char* pPackedSource);
extern volatile unsigned long* tick; extern volatile unsigned long* tick;
@ -184,6 +187,12 @@ extern void DrawTile(int offset, int tileNo);
extern void SetSpriteBanks(short b0, short b1, short b2, short b3); extern void SetSpriteBanks(short b0, short b1, short b2, short b3);
extern void DrawSprite(int offset, int SpriteNo); extern void DrawSprite(int offset, int SpriteNo);
// Code for presenting backpage
extern void PresentPalette(void);
extern void PresentSCB(void);
extern void PresentFrameBuffer(void);
extern void BlitRect(short x, short y, short width, short height);
// ADB Support Code // ADB Support Code
extern char KeyArray[128]; extern char KeyArray[128];
extern void RemoveKeyboardDriver(); extern void RemoveKeyboardDriver();