ZP_JOY0_BUTTONS = $16
ZP_JOY1_BUTTONS = $17
+;** BIOS
+BIOS_IRQ1_ADDR = $FF3F
+BIOS_IRQ2_ADDR = $FF52
+BIOS_NMI_RESET_ADDR = $F808
-/* CreatiVision Header */
+/*****************************************************************************/
+/* */
+/* creativision.h */
+/* */
+/* Creativision system specific definitions */
+/* */
+/* */
+/* */
+/* (C) 2013 cvemu */
+/* (C) 2017 Christian Groessler <chris@groessler.org> */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
#ifndef _CVISION_H
-
#define _CVISION_H
+/* Character codes */
#define CH_VLINE 33
#define CH_HLINE 34
#define CH_ULCORNER 35
#define CH_LLCORNER 37
#define CH_LRCORNER 38
+/* no support for dynamically loadable drivers */
#define DYN_DRV 0
/* Colours - from TMS9918 */
#define C_TRANSPARENT 0
#define C_BLACK 1
-#define C_MED_GREEN 2
+#define C_MED_GREEN 2
#define C_LIGHT_GREEN 3
#define C_DARK_BLUE 4
#define C_LIGHT_BLUE 5
#define C_GREY 14
#define C_WHITE 15
-/* Joystick states */
-#define JOY_UP 5
-#define JOY_DOWN 1
-#define JOY_LEFT 7
-#define JOY_RIGHT 3
-#define JOY_LEFT_UP 6
-#define JOY_LEFT_DOWN 8
-#define JOY_RIGHT_UP 4
-#define JOY_RIGHT_DOWN 2
-#define JOY_LBUTTON 1
-#define JOY_RBUTTON 2
-
-/* Joystick values */
-#define JOY_LEFT_DIR 1
-#define JOY_RIGHT_DIR 2
-#define JOY_LEFT_BUTTONS 3
-#define JOY_RIGHT_BUTTONS 4
-
/* Protos */
-void __fastcall__ psg_outb( unsigned char b );
-void __fastcall__ psg_delay( unsigned char b );
-void psg_silence( void );
-void __fastcall__ bios_playsound( void *a, unsigned char b);
-unsigned char __fastcall__ joystate( unsigned char which );
+void __fastcall__ psg_outb(unsigned char b);
+void __fastcall__ psg_delay(unsigned char b);
+void psg_silence(void);
+void __fastcall__ bios_playsound(void *a, unsigned char b);
-#endif
+#endif /* #ifndef _CVISION_H */
.export _exit
.export __STARTUP__ : absolute = 1 ; Mark as startup
+ .export irq2
.import zerobss, copydata
.import initlib, donelib, callmain
.import __VECTORS_LOAD__, __VECTORS_RUN__, __VECTORS_SIZE__
.import __ZP_LAST__, __STACKSIZE__, __RAM_START__
+ .include "creativision.inc"
.include "zeropage.inc"
; ------------------------------------------------------------------------
.segment "VECTORS"
-irq1: jmp $FF3F
-irq2: jmp $FF52
+irq1: jmp BIOS_IRQ1_ADDR
+irq2: jmp BIOS_IRQ2_ADDR
; ------------------------------------------------------------------------
; Define CART setup values for BIOS.
; BIOS Vector after NMI or RESET
; Keeping with retail cartridges, we jump back to BIOS ROM and have it
; setup zeropage etc, and show the Creativision logo and copyright.
- .addr $F808
+ .addr BIOS_NMI_RESET_ADDR
; BIOS Short Interrupt Handler
; Vectored from BIOS ROM:FE2C. This should contain a pointer to the user's
--- /dev/null
+;
+; IRQ handling (CreatiVision version)
+;
+
+ .export initirq, doneirq
+ .import callirq, irq2
+
+ .include "creativision.inc"
+
+; ------------------------------------------------------------------------
+
+.segment "ONCE"
+
+initirq:
+ lda #<IRQStub
+ ldx #>IRQStub
+ jmp setvec
+
+; ------------------------------------------------------------------------
+
+.code
+
+doneirq:
+ lda #<BIOS_IRQ2_ADDR
+ ldx #>BIOS_IRQ2_ADDR
+setvec: sei
+ sta irq2+1
+ stx irq2+2
+ cli
+ rts
+
+; ------------------------------------------------------------------------
+
+.segment "CODE"
+
+IRQStub:
+ cld ; Just to be sure
+ jsr callirq ; Call the functions
+ jmp BIOS_IRQ2_ADDR ; Jump to the BIOS IRQ vector
+
; ------------------------------------------------------------------------
; Constants
-JOY_COUNT = 2 ; Number of joysticks we support
+JOY_COUNT = 2 ; Number of joysticks we support
; ------------------------------------------------------------------------
; Code
INSTALL:
lda #JOY_ERR_OK
ldx #0
-; rts ; Fall through
+; rts ; Fall through
; ------------------------------------------------------------------------
; UNINSTALL routine. Is called before the driver is removed from memory.
;
READJOY:
- and #1 ; fix joystick number
- bne READJOY_1 ; read right joystick
+ and #1 ; fix joystick number
+ bne READJOY_1 ; read right joystick
; Read left joystick
ldx ZP_JOY0_DIR
lda ZP_JOY0_BUTTONS
- jmp convert ; convert joystick state to sane cc65 values
+ jmp convert ; convert joystick state to sane cc65 values
; Read right joystick
lda ZP_JOY1_BUTTONS
lsr a
lsr a
- ;jmp convert ; convert joystick state to sane cc65 values
- ; fall thru...
+ ;jmp convert ; convert joystick state to sane cc65 values
+ ; fall thru...
; ------------------------------------------------------------------------
; convert: make runtime lib compatible values
convert:
ldy #0
- sty retval ; initialize return value
+ sty retval ; initialize return value
; ------
; buttons:
; values were shifted to the right to be identical).
; Why are there two bits indicating a pressed trigger?
; According to the "Second book of programs for the Dick Smith Wizard"
- ; (pg. 88ff), the left hand fire button gives the value of
+ ; (pg. 88ff), the left hand fire button gives the value of
; %00010001 and the right hand button gives %00100010
; Why two bits? Am I missing something? Can there be cases that just
; one of those bits is set?
and #%00010001
beq cnv_1
- inc retval ; left button pressed
+ inc retval ; left button pressed
cnv_1: tya
and #%00100010
lda #$02
ora retval
- sta retval ; right button pressed
+ sta retval ; right button pressed
; ------
; direction:
cnv_2: txa
- ; tested with https://sourceforge.net/projects/creativisionemulator
- ; $49 - %01001001 - up
- ; $41 - %01000001 - down
- ; $4D - %01001101 - left
- ; $45 - %01000101 - right
- ;
- ; are these correct? "Second book of programs for the Dick Smith Wizard" pg. 85 says something different
- ; ignored for now...
- ; $85 - %10000101 - up + right
- ; $8D - %10001101 - down + left
- ; $89 - %10001001 - up + left
- ; $85 - %10000101 - down + right (emulator bug?)
-
- bit testbit ; bit #0 set?
- beq done ; no, no direction
-
- and #%00001100 ; mask out other bits
- tax
- lda #%00000100 ; init bitmask
-loop: dex
- bmi done2
- asl a
- bne loop
-
-done2: ora retval
- rts
-
-done: lda retval
- rts
+ ; tested with https://sourceforge.net/projects/creativisionemulator
+ ; $49 - %01001001 - up
+ ; $41 - %01000001 - down
+ ; $4D - %01001101 - left
+ ; $45 - %01000101 - right
+ ;
+ ; are these correct? "Second book of programs for the Dick Smith Wizard" pg. 85 says something different
+ ; ignored for now...
+ ; $85 - %10000101 - up + right
+ ; $8D - %10001101 - down + left
+ ; $89 - %10001001 - up + left
+ ; $85 - %10000101 - down + right (emulator bug?)
+
+ bit testbit ; bit #0 set?
+ beq done ; no, no direction
+
+ and #%00001100 ; mask out other bits
+ lsr a
+ lsr a
+ tax
+ lda #%00000100 ; init bitmask
+loop: dex
+ bmi done2
+ asl a
+ bne loop
+
+done2: ora retval
+ rts
+
+done: lda retval
+ rts
; ------------------------------------------------------------------------
;
.data
-testbit:.byte $01
+testbit:.byte $01
; ------------------------------------------------------------------------
;
clrscr ();
count = joy_count ();
-#ifdef __ATARI5200__
+#if defined(__ATARI5200__) || defined(__CREATIVISION__)
cprintf ("JOYSTICKS: %d", count);
#else
cprintf ("Driver supports %d joystick(s)", count);
for (i = 0; i < count; ++i) {
gotoxy (0, i+1);
j = joy_read (i);
-#ifdef __ATARI5200__
+#if defined(__ATARI5200__) || defined(__CREATIVISION__)
cprintf ("%1d:%-3s%-3s%-3s%-3s%-3s%-3s",
i,
- (j & joy_masks[JOY_UP])? " U " : " u ",
- (j & joy_masks[JOY_DOWN])? " D " : " d ",
- (j & joy_masks[JOY_LEFT])? " L " : " l ",
- (j & joy_masks[JOY_RIGHT])? " R " : " r ",
+ (j & joy_masks[JOY_UP])? " U " : " ",
+ (j & joy_masks[JOY_DOWN])? " D " : " ",
+ (j & joy_masks[JOY_LEFT])? " L " : " ",
+ (j & joy_masks[JOY_RIGHT])? " R " : " ",
(j & joy_masks[JOY_FIRE])? " 1 " : " ",
(j & joy_masks[JOY_FIRE2])? " 2 " : " ");
#else
projects / cc65 / commitdiff