6502/cc65
1
0
Fork 0
mirror of https://github.com/cc65/cc65.git synced 2024-06-15 02:29:32 +00:00
Code Issues Projects Releases Wiki Activity

Fixes for the pet-ptvjoy driver and a new standard joystick driver by Marco

Browse Source 
van den Heuvel. Cleanup and integration by me.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4604 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2010-02-28 09:56:51 +00:00
parent a284d8ffeb
commit 207a8ea10d
4 changed files with 129 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libsrc/pet/Makefile
View File

@ -71,7 +71,7 @@ OBJS = _scrsize.o \
EMDS =
JOYS = pet-ptvjoy.joy
JOYS = pet-ptvjoy.joy pet-stdjoy.joy
TGIS =

2
libsrc/pet/joy_stddrv.s
View File

@ -10,5 +10,5 @@
.rodata
_joy_stddrv: .asciiz "pet-ptvjoy.joy"
_joy_stddrv: .asciiz "pet-stdjoy.joy"

3
libsrc/pet/pet-ptvjoy.s
View File

@ -98,6 +98,7 @@ joy1: lda #$80 ; via port A read/write
lda VIA_PRA ; via port A read/write
and #$1f ; get bit 4-0 (PA4-PA0)
eor #$1f
rts
; Read joystick 2
@ -113,7 +114,7 @@ joy2: lda #$00 ; via port A read/write
and #%00100000 ; get bit 5 (PA5)
lsr
ora tmp1
eor #$1f
ldx #0
rts

125
libsrc/pet/pet-stdjoy.s Normal file
View File

@ -0,0 +1,125 @@
;
; Standard PET userport joystick driver for the PET
;
; Marco van den Heuvel, 2010-01-23
;
.include "zeropage.inc"
.include "joy-kernel.inc"
.include "joy-error.inc"
.include "pet.inc"
; ------------------------------------------------------------------------
; Header. Includes jump table
.segment "JUMPTABLE"
; Driver signature
.byte $6A, $6F, $79 ; "joy"
.byte JOY_API_VERSION ; Driver API version number
; Button state masks (8 values)
.byte $01 ; JOY_UP
.byte $02 ; JOY_DOWN
.byte $04 ; JOY_LEFT
.byte $08 ; JOY_RIGHT
.byte $10 ; JOY_FIRE
.byte $00 ; JOY_FIRE2 unavailable
.byte $00 ; Future expansion
.byte $00 ; Future expansion
; Jump table.
.addr INSTALL
.addr UNINSTALL
.addr COUNT
.addr READ
.addr 0 ; IRQ entry unused
; ------------------------------------------------------------------------
; Constants
JOY_COUNT = 2 ; Number of joysticks we support
.code
; ------------------------------------------------------------------------
; INSTALL routine. Is called after the driver is loaded into memory. If
; possible, check if the hardware is present and determine the amount of
; memory available.
; Must return an JOY_ERR_xx code in a/x.
;
INSTALL:
lda #<JOY_ERR_OK
ldx #>JOY_ERR_OK
; rts ; Run into UNINSTALL instead
; ------------------------------------------------------------------------
; UNINSTALL routine. Is called before the driver is removed from memory.
; Can do cleanup or whatever. Must not return anything.
;
UNINSTALL:
rts
; ------------------------------------------------------------------------
; COUNT: Return the total number of available joysticks in a/x.
;
COUNT:
lda #<JOY_COUNT
ldx #>JOY_COUNT
rts
; ------------------------------------------------------------------------
; READ: Read a particular joystick passed in A.
;
READ:
tax ; Joystick number into X
bne joy2
; Read joystick 1
joy1:
lda #0
sta VIA_DDRA
lda VIA_PRA
and #$0f
cmp #$0c
bne @notc1
lda #$0f
bne @end1
@notc1:
ora #$10
@end1:
eor #$1f
rts
; Read joystick 2
joy2:
lda #0
sta VIA_DDRA
lda VIA_PRA
lsr
lsr
lsr
lsr
cmp #$0c
bne @notc2
lda #$0f
bne @end2
@notc2:
ora #$10
@end2:
eor #$1f
ldx #0
rts