Apple ][2023. 4. 4. 16:28

AY-3-8910

 

 

Latch Address: This signal indiates that the bus contains a resister address which should be latched in the PSG. DA7~DA0 are in the input mode.

 

from 6522, ORB[0] = BC1, ORB[1] = BDIR, ORB[2] = ~RESET

 

ORB = 7 (111): Latch Address, sets register address

ORB = 6 (110): Write To PSG register

ORB = 4 (100): Inactive

ORB = 0~3 (0xx): Reset  : clears all registers

 

procedure: Command -> Inactive

 

* sets PSG register to N (0~15)

lda #N

sta ora  ; connected to psg data bus

lda #7   ; loads 'latch address' command

sta orb  ; sends the command. connected to bus controls (BDIR, BC1)

lda #4   ; loads inactive command

sta orb  ; sends the command

 

* writes data to PSG's current register

lda data

sta ora

lda #6    ; 'write to psg' command

sta orb

lda #4

sta orb

 

* reset

stz orb

lda #4

sta orb

 

==> PSG, R[2] = 2

set PSG register to 2 -> writes 2 to PSG

 

Register \ bit B7 B6 B5 B4 B3 B2 B1 B0
R0 Channel A Tone Period 8-Bit Fine Tune A
R1   4-Bit Coarse Tune A
R2 Channel B Tone Period 8-Bit Fine Tune B
R3   4-Bit Coarse Tune B
R4 Channel C Tone Period 8-Bit Fine Tune C
R5   4-Bit Coarse Tune C
R6 Noise period   5-Bit Period control
R7 Enable ( bit 0 = on, 1 = off ) IN/OUT Noise Tone
IOB IOA C B A C B A
R8 Channel A Envelope on/off, Volume   Env volume
R9 Channel B Envelope on/off, Volume   Env volume
R10 Channel C Envelope on/off, Volume   Env volume
R11 Envelope Period 8-Bit Fine Tune Envelope
R12   4-Bit Coarse Tune Envelope
R13 Envelope Shape/Cycle   CONT ATT ALT HOLD
R14 I/O Port A Data Store 8-Bit Parallel I/O on Port A
R15 I/O Port B Data Store 8-Bit Parallel I/O on Port B

* Enable output Channel A (R7 = 0011 1110)

 

 

 

Posted by GNUPart
Apple ][2023. 4. 3. 17:26

6522

* datasheet

https://eater.net/datasheets/w65c22.pdf

 

 

* code exam.

https://github.com/fenarinarsa/Latecomer/blob/master/tools.a#L174

 

-sets timer

config_timer
    ; interruption - TIMER 1 6522
    LDA #%01000000      ; continuous interrupt / PB7 disabled
    ldy #$0B
    STA (MB_OUT),y      ; $Cx0B Auxiliary Control Register

    LDA #%11000000      ;
    ldy #$0D
    STA (MB_OUT),y      ; $Cx0D interrupt flag register (Time Out of Timer 1/Int)
    ldy #$0E
    STA (MB_OUT),y      ; $Cx0E interrupt Enable register (Timer 1 + Set)
   
    ; The 6522 timer to play at 50Hz is different on a PAL or NTSC Apple II
    ; Main Apple II clock is (composite frequency):
    ; PAL = 1.016 MHz
    ; NTSC = 1.0205 MHz
    ;
    ; For future reference the 6522 counter for a complete frame size should be set to
    ; PAL = $4F36 (50.08Hz) = 20280-2 cycles
    ; NTSC = $4284 (~59.94Hz) = 17030-2 cycles
    ;
    ; Of course on PAL Apple IIc the VSYNC interrupt may be used, it already has a frequency of 50.08Hz
    ;
    ; Because of the clock differences,
    ; to get a frequency 50.08Hz on an NTSC Apple II the 6522 counter should actually be set at $4F88
    ; but the difference is not big enough to be heard and I'm lazy
    ;
    ; We're using T1 (first timer) on MB's first 6522 (there is two timers/6522 and two 6522 on a MB)
    ; T1 is set in free run mode so the counter needs to be set up only once
    ; the timer will start and loop once the counter high byte is written

    LDA #$36
    ldy #$04
    STA (MB_OUT),y      ; $Cx04 T1C-Lower
    LDA #$4F
    ldy #$05
    STA (MB_OUT),y      ; $Cx05 T1C-High

    lda MB_OUT+1    ; modifies the BIT instruction in VBLI
    sta vbli_mod1+2
    +set_ptr VBLI_compatible,$FFFE  ; setting up the 50Hz interrupt handler

    rts

 

- interrupt routine

VBLI_compatible
    ; Interrupt handler for IIe/IIc, using a 50Hz mockingboard interrupt
    ; on PAL should activate roughly at the start of VBLANK
    ; on NTSC will activate quite anywhere => tearing :)

    php             ; save flags
    sta save_a
    stx save_x
    sty save_y

    lda #$7f
vbli_mod1   sta $C40D ; clear IFR
    ;bit $C404       ; Clears interrupt (T1CL)  / modified instruction

    ; change VBL flag
    ldx #0
    stx vblflag     ; clear hibit
   
    ;----- HGR double buffering
    lda vbl_swaphgr
    beq .noswap
    stx vbl_swaphgr
    jsr swap_page
.noswap +inc16 vbl_count
   
    ; play music
    lda music_on
    beq .no_music
    jsr player_mb
.no_music

    ldy save_y
    ldx save_x
    lda save_a
    plp
    rti

 

 

 

 

 

 

Posted by GNUPart
Unity2015. 12. 11. 17:52

Unity3D Custom Sprite Pivot Editor in SceneView

Unity3D, Sprite, Sprite Pivot, Custom Editor, Pivot Edit, SceneView, 피벗, 피봇, 스프라이트, 설정, 씬뷰, 커스텀 에디터

 

 

 

 

 

 

 스프라이트를 이용한 캐릭터 작업시, 너무 번거로운 피벗세팅 때문에 만들게 되었습니다. 관련 패키지를 첨부합니다.

 

 

* 주요기능은 다음과 같습니다.

- Edits a pivot in SceneView ( 씬뷰에서 피벗을 설정할 수 있습니다. )

  - by presets ( 기본 설정값들로 작업 )

  - by dragging gizmo ( 피벗포인트를 드래그 )

  - by dragging object ( 해당 오브젝트를 드래그 )

 

- Gives pixel-perfect pivot option ( 픽셀에 맞춰 피벗을 설정할 수 있습니다. )

- Moves a gameobject along parent's pixel unit 

 ( 부모 스프라이트의 픽셀에 맞춰 오브젝트를 이동할 수 있습니다.)

 

- Supports Single/Multiple sprite mode.

 (싱글/멀티 스프라이트 모드, 모두에 사용가능합니다.) 

 

- Undo is not supported!!! ( Undo기능 없어요. 주의바랍니다. )

 

* 기능 구현에 사용한 방법은 다음과 같이 간단한 도메인 변환입니다.

- World-Position -> Local-Position -> Pivot

- Pivot -> Local-Position -> World-Position

 

첨부된 소스코드중,

zUtils.cs::zWorldPositionToPivot, zPivotToWorldPosition

을 참고바랍니다.

 

* Source codes

Editor/

  zCommonEditor.cs : Common editor utilities

  zSpriteEditor.cs : Editor-Template for SpriteRenderer

  zSpritePivotExt.cs : Custom sprite pivot editor (inherits from zSpriteEditor)

zUtils/

  zUtils.cs : Common utilities for sprite pivot

 

 

* Desciption

 

 NORMAL-MODE

 

- Lock Position : on pivot editing, prevents changing of local-position

( 피벗설정시, local-position이 움직이는 것을 방지합니다.)

 

- Align to Pixel : pivot is snapped to pixel-unit

( 픽셀단위로 피벗을 설정합니다. )

 

- Presets : default presets, like Center, TopLeft, BottomCenter, and so on

   ( 기존 피벗 프리셋입니다. )

 

- Edit : Change mode to EDIT-MODE, ( 피벗설정 모드로 전환합니다. )

 In EDIT-MODE, inspector and sceneview are shown as belows: 

 

 

- Apply : applies editted pivot ( It will change Asset ImportSetting directly )

설정된 피벗을 적용합니다.

- Cancel : cancels (취소)

 

- Copy : copies current pivot value (Vector2)

(현재 설정된 피벗값을 복사합니다.)

 

- Paste : pastes copied pivot to current sprite

(복사된 값을 현재 스프라이트에 적용합니다.)

 

* Press A-Key and move a gameobject : gameobject will move along its parent's pixel-unit.

 ( A키를 누른상태에서 오브젝트를 이동하면, 부모 스프라이트의 픽셀에 맞출수 있습니다. )

 

For more information, see the attached video. 첨부된 동영상에 좀더 자세한 설명이 있습니다.

 

 

Posted by GNUPart

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