mirror of
https://github.com/cc65/cc65.git
synced 2024-11-04 17:04:58 +00:00
155 lines
4.3 KiB
ArmAsm
155 lines
4.3 KiB
ArmAsm
;
|
|
; Joystick driver using C128 number pad in 64 mode.
|
|
; May be used multiple times when linked to the statically application.
|
|
;
|
|
; Stefan Haubenthal, 2004-01-26
|
|
; Based on Ullrich von Bassewitz, 2002-12-20
|
|
;
|
|
|
|
.include "zeropage.inc"
|
|
|
|
.include "joy-kernel.inc"
|
|
.include "joy-error.inc"
|
|
.include "c64.inc"
|
|
|
|
.macpack generic
|
|
.macpack module
|
|
|
|
|
|
; ------------------------------------------------------------------------
|
|
; Header. Includes jump table
|
|
|
|
module_header _c64_numpad_joy
|
|
|
|
; Driver signature
|
|
|
|
.byte $6A, $6F, $79 ; "joy"
|
|
.byte JOY_API_VERSION ; Driver API version number
|
|
|
|
; Library reference
|
|
|
|
.addr $0000
|
|
|
|
; Jump table.
|
|
|
|
.addr INSTALL
|
|
.addr UNINSTALL
|
|
.addr COUNT
|
|
.addr READ
|
|
.addr 0 ; IRQ entry unused
|
|
|
|
; ------------------------------------------------------------------------
|
|
; Constants
|
|
|
|
JOY_COUNT = 1 ; Number of joysticks we support
|
|
|
|
|
|
; ------------------------------------------------------------------------
|
|
; Data.
|
|
|
|
.rodata
|
|
|
|
; <U>p '8' key
|
|
; <D>own '2' key
|
|
; <L>eft '4' key
|
|
; <R>ight '6' key
|
|
; <B>utton '5' or ENTER key
|
|
|
|
masktable:
|
|
; Input: LDRBU
|
|
; Output: BRLDU
|
|
.byte %00000000 ; $00
|
|
.byte %00000001 ; $01
|
|
.byte %00010000 ; $02
|
|
.byte %00010001 ; $03
|
|
.byte %00001000 ; $04
|
|
.byte %00001001 ; $05
|
|
.byte %00011000 ; $06
|
|
.byte %00011001 ; $07
|
|
.byte %00000010 ; $08
|
|
.byte %00000011 ; $09
|
|
.byte %00010010 ; $0A
|
|
.byte %00010011 ; $0B
|
|
.byte %00001010 ; $0C
|
|
.byte %00001011 ; $0D
|
|
.byte %00011010 ; $0E
|
|
.byte %00011011 ; $0F
|
|
.byte %00000100 ; $10
|
|
.byte %00000101 ; $11
|
|
.byte %00010100 ; $12
|
|
.byte %00010101 ; $13
|
|
.byte %00001100 ; $14
|
|
.byte %00001101 ; $15
|
|
.byte %00011100 ; $16
|
|
.byte %00011101 ; $17
|
|
.byte %00000110 ; $18
|
|
.byte %00000111 ; $19
|
|
.byte %00010110 ; $1A
|
|
.byte %00010111 ; $1B
|
|
.byte %00001110 ; $1C
|
|
.byte %00001111 ; $1D
|
|
.byte %00011110 ; $1E
|
|
.byte %00011111 ; $1F
|
|
|
|
.code
|
|
|
|
; ------------------------------------------------------------------------
|
|
; INSTALL routine. Is called after the driver is loaded into memory. If
|
|
; possible, check if the hardware is present and determine the amount of
|
|
; memory available.
|
|
; Must return an JOY_ERR_xx code in a/x.
|
|
;
|
|
|
|
INSTALL:
|
|
lda #JOY_ERR_OK ; Assume we have a joystick
|
|
ldx VIC_CLK_128 ; Test for a C128
|
|
cpx #$FF
|
|
bne @C128 ; Jump if we have one
|
|
lda #JOY_ERR_NO_DEVICE ; No C128 -> no numpad
|
|
@C128: ldx #0 ; Set high byte
|
|
|
|
; 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 #0
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; READ: Read a particular joystick passed in A.
|
|
;
|
|
|
|
READ: tax ; Clear high byte
|
|
lda #$FD ; For ENTER and '6'
|
|
ldy #$FE ; For '8', '5', '2', '4'
|
|
sei
|
|
sta VIC_KBD_128
|
|
lda CIA1_PRB
|
|
and #%00110000
|
|
eor #%00110000
|
|
lsr ; Map ENTER ...
|
|
lsr ; ... onto '5'
|
|
sty VIC_KBD_128
|
|
eor CIA1_PRB
|
|
iny
|
|
sty VIC_KBD_128 ; Reset to $FF
|
|
cli
|
|
and #%00111110
|
|
eor #%00111110
|
|
lsr
|
|
tay
|
|
lda masktable,y ; Convert LDRBU to BRLDU
|
|
rts
|