研究Game Gear Micro掌機的開源可行性

司徒 · 2022-03-08 08:08:44

什麼！司徒你又開了一個新帖～不是要研究草食系統嗎？難道，草食系統已經進入生命結束前必須完成的作品之中嗎？這...不好說～司徒把這個帖子看待成番外篇，番外的特性就是盡量不要引起外人注意就草草結束～此時，邪惡的鍵盤俠可能要說：司徒的話如果可以信，狗屎都可以吃了，坦白說，司徒的話確實可以信的，狗屎也確實是可以吃的～

番外篇的目標如下：
1. 可以從MicroSD進入Linux系統
2. 可以支援雙系統
3. 可以控制屏幕顯示
4. 可以玩GBA模擬器
P.S. 達標後，此貼就會結帖

簡要規格

CPU          Allwinner F1C200S ARM9 408MHz
RAM          32MB
Flash        128MB
Screen       1.15" 240x180
Gamepad      DPad, 2 Buttons, Start
Port         MicroUSB
Battery      AAAx2
Dimension    80mm x 40mm x 20mm
Weight       60g

正面

下邊

側邊

上邊

側邊

精美的包裝盒，真像以前購買GB卡帶的感覺...

背面

主機

相較於PocketGo的大小

正面

背面

PCB主板

Allwinner F1C200S

8006UL LD53EG(聲音放大)

PCB正面

XT26G01AWSEGA

X1308V0 20200727

屏24Pin

ALT-013BSLN-J2

喇叭

有落塵可能

B面

AAAx2

軟膠墊

DPad中心支撐在軟膠墊上

M+ · 2022-03-08 11:05:20

沙发！前排支持

jordonwu · 2022-03-08 13:58:28

有串口吗？

bigbigcong · 2022-03-08 14:44:21

哈哈哈，司徒你多大了？文章开头好中二啊哈哈哈

司徒 · 2022-03-08 15:35:22

@jordonwu
串口有PCB焊點

@bigbigcong
今年剛滿２０歲～

tigger · 2022-03-08 15:41:46

司徒应该不是20, 因为年龄越小对掌机越没得感觉, 喜欢掌机都是像我这样的老骨头了.

司徒 · 2022-03-08 21:22:50

@tigger
老骨头總是有相同的默契～哈～

UART位置

跳線

連接UART

Baudrate 115200bps

[0]HELLO! BOOT0 is starting!
[2]boot0 commit : e9d7c88390ded1551ff4a4bcfef31cbc9cf717cb
 
[0]HELLO! BOOT0 is starting!
[2]boot0 commit : e9d7c88390ded1551ff4a4bcfef31cbc9cf717cb
 
[0]HELLO! BOOT0 is starting!
[2]boot0 commit : e9d7c88390ded1551ff4a4bcfef31cbc9cf717cb
 
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 3.10.65 (oe-user@oe-host) (gcc version 8.3.0 (GCC) ) #1 Tue Jul 21 03:52:29 UTC 2020
[    0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] Machine: Allwinner A1X (Device Tree), model: sun3iw1p1
[    0.000000] bootconsole [earlycon0] enabled
INIT: version 2.88 booting
/dev/nandh: LABEL="UDISK" UUID="2b800baa-27fe-453f-a194-cee18ef6824a" TYPE="ext4"
/dev/nandh already format by ext4
/dev/nande: LABEL="rootfs_data" UUID="3e6930be-09d1-481c-b098-4e68743a36f6" TYPE="ext4"
/dev/nande already format by ext4
Starting udev
hwclock: can't open '/dev/misc/rtc': No such file or directory
Tue Jul 21 04:02:17 UTC 2020
hwclock: can't open '/dev/misc/rtc': No such file or directory
rm: can't remove '/tmp': Read-only file system
rm: can't remove '/etc/resolv.conf': Read-only file system
ln: /etc/resolv.conf: File exists
INIT: Entering runlevel: 5
Configuring network interfaces... ip: SIOCGIFFLAGS: No such device
hwclock: can't open '/dev/misc/rtc': No such file or directory
Starting syslogd/klogd: done

Vivid-Yocto-Distro V0.1 c200s-gamegearmicro /dev/ttyS0

c200s-gamegearmicro login:

司徒 · 2022-03-09 07:24:43

進入Flash Mode(按住按鍵，然後插入USB)

偵測到的裝置

$ lsusb
  Bus 001 Device 008: ID 1f3a:efe8 Onda (unverified) V972 tablet in flashing mode

司徒 · 2022-03-13 20:08:59

司徒想了想，發現有一個位置可以用來擺放MicroSD

F1C200S左邊是屏的走線，右邊則是用來跳線連接MicroSD，這改機難度屬於中上...

為了方便跳線，司徒先將10uPF、1M電阻拆掉

原本想直接使用MicroSD元件，但是，發現接觸的排針會脫落，需要固定，因此，司徒找來一個肉雞

電宰後...

相當完美的位置

但是，下方是屏的走線，假如先改造MicroSD，這屏的問題可能就很難解

因此，司徒打算先把屏的初始化代碼找出來，於是開始刮線

腳位圖

標示位置

跳線

屏的走線真的蠻細的，需要一點苦工，司徒一想到後面的MicroSD跳線，有種想哭的感覺...

寨機邏輯分析儀上場

由上而下分別是：CS、RD、RS、WR、PD0、DB0~DB7、PD8，從這個圖，得到四個資訊：
1. 屏的驅動方式是MCU方式(i80)
2. 屏有TE腳位(Screen Tearing)
3. PD0是TE腳位
4. PD8是RESET腳位

TE腳位剛好是60Hz，代表這個屏的顯示可以達60FPS，相當不錯的屏

邏輯分析儀取得的資料

0.000000000,1,1,1,0,0,0,0,0,0,0,0,1
0.000002600,1,1,1,0,0,0,0,0,0,0,0,0
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0.110548360,1,1,1,0,0,0,0,0,0,0,0,0
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0.462119360,0,1,1,0,0,1,1,0,0,0,0,1
0.462119400,0,1,0,0,0,1,1,0,0,0,0,1
0.462119440,1,1,1,0,0,1,0,0,0,0,0,1
0.462119480,1,1,1,0,0,0,0,0,0,0,0,1
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0.462826160,1,1,1,0,0,0,0,0,0,0,0,1
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0.465054280,0,1,1,0,0,0,1,1,1,1,1,1
0.465054320,0,1,0,0,0,0,1,1,1,1,1,1
0.465054360,0,1,1,0,0,0,1,1,1,1,1,1
0.465054400,1,1,1,0,0,0,0,0,0,0,0,1
0.465155200,0,1,1,0,0,1,0,0,0,0,1,1
0.465155240,0,1,0,0,0,1,0,0,1,0,1,1
0.465155280,0,1,1,0,0,1,0,0,1,0,1,1
0.465155320,1,1,1,0,0,0,0,0,0,0,0,1
0.465256240,0,0,1,1,1,1,0,0,0,0,1,1
0.465256280,0,0,0,1,1,1,0,0,0,0,1,1
0.465256320,0,0,1,1,1,1,0,0,0,0,1,1
0.465256360,1,1,1,0,0,0,0,0,0,0,0,1
0.465358160,0,1,0,1,1,0,1,0,0,0,0,1
0.465358240,1,1,1,0,0,0,0,0,0,0,0,1
0.465459160,0,1,1,0,0,0,0,0,0,1,0,1
0.465459200,0,1,0,0,0,0,0,0,0,1,0,1
0.465459240,0,1,1,0,0,0,0,0,0,1,0,1
0.465459280,1,1,1,0,0,0,0,0,0,0,0,1
0.465560120,0,1,0,0,0,0,0,1,1,0,1,1
0.465560200,1,1,1,0,0,0,0,0,0,0,0,1
0.465662120,0,1,0,0,0,0,1,0,0,0,0,1
0.465662200,1,1,1,0,0,0,0,0,0,0,0,1
0.465763040,0,1,1,0,0,0,1,0,1,0,1,1
0.465763080,0,1,0,0,0,0,1,0,1,0,1,1
0.465763120,1,1,1,0,0,0,0,0,0,0,0,1
0.465865040,0,1,1,0,0,1,0,1,0,1,0,1
0.465865080,0,1,0,0,0,1,0,1,0,1,0,1
0.465865120,1,1,1,0,0,0,0,0,0,0,0,1
0.465965960,0,1,1,0,0,1,1,1,1,0,0,1
0.465966000,0,1,0,0,0,1,1,1,1,0,0,1
0.465966040,0,1,1,0,0,1,1,1,1,0,0,1
0.465966080,1,1,1,0,0,0,0,0,0,0,0,1
0.466067000,0,1,1,0,1,0,0,0,0,1,0,1
0.466067040,0,1,0,0,1,0,0,0,0,1,0,1
0.466067080,1,1,1,0,0,0,0,0,0,0,0,1
0.466168880,0,1,1,0,1,0,1,0,0,0,1,1
0.466168920,0,1,0,0,1,0,1,0,0,0,1,1
0.466168960,0,1,1,0,1,0,1,0,0,0,1,1
0.466169000,1,1,1,0,0,0,0,0,0,0,0,1
0.466269920,0,1,1,0,0,1,0,0,1,1,0,1
0.466269960,0,1,0,0,0,1,0,0,1,1,0,1
0.466270000,1,1,1,0,0,1,0,0,1,0,0,1
0.466270040,1,1,1,0,0,0,0,0,0,0,0,1
0.466370840,0,1,1,0,0,0,1,1,1,1,1,1
0.466370880,0,1,0,0,0,0,1,1,1,1,1,1
0.466370920,0,1,1,0,0,0,1,1,1,1,1,1
0.466370960,1,1,1,0,0,0,0,0,0,0,0,1
0.466472840,0,1,1,0,0,0,1,1,1,1,1,1
0.466472880,0,1,0,0,0,0,1,1,1,1,1,1
0.466472920,0,1,1,0,0,0,1,1,1,1,1,1
0.466472960,1,1,1,0,0,0,0,0,0,0,0,1
0.466573800,0,1,0,0,0,1,0,0,0,0,0,1
0.466573840,0,1,1,0,0,1,0,0,0,0,0,1
0.466573880,1,1,1,0,0,0,0,0,0,0,0,1
0.466675800,0,1,0,0,0,1,0,0,1,0,1,1
0.466675880,1,1,1,0,0,0,0,0,0,0,0,1
0.466776720,0,0,1,0,0,1,0,0,0,0,1,1
0.466776760,0,0,0,0,0,1,0,0,0,0,1,1
0.466776800,1,1,1,0,0,0,0,0,0,0,0,1
0.466877720,0,0,1,0,0,1,0,1,0,0,0,1
0.466877760,0,0,0,0,0,1,0,1,1,0,0,1
0.466877800,0,0,1,0,0,1,0,1,1,0,0,1
0.466877840,1,1,1,0,0,0,0,0,0,0,0,1
0.466979640,0,1,1,0,0,0,0,0,0,0,0,1
0.466979680,0,1,0,0,0,0,0,0,0,0,0,1
0.466979720,0,1,1,0,0,0,0,0,0,0,0,1
0.466979760,1,1,1,0,0,0,0,0,0,0,0,1
0.467080560,0,1,1,0,0,0,0,0,0,0,0,1
0.467080600,0,1,0,0,0,0,0,0,0,0,0,1
0.467080640,0,1,1,0,0,0,0,0,0,0,0,1
0.467080680,1,1,1,0,0,0,0,0,0,0,0,1
0.467181600,0,1,1,0,0,0,0,0,0,0,0,1
0.467181640,0,1,0,0,0,0,0,0,0,0,0,1
0.467181680,1,1,1,0,0,0,0,0,0,0,0,1
0.467283520,0,1,0,1,1,1,0,1,1,1,1,1
0.467283560,0,1,1,1,1,1,0,1,1,1,1,1
0.467283600,1,1,1,0,0,0,0,0,0,0,0,1
0.467384520,0,0,1,0,0,1,0,1,1,0,1,1
0.467384560,0,0,0,0,0,1,0,1,1,0,1,1
0.467384600,0,0,1,0,0,1,0,1,1,0,1,1
0.467384640,1,1,1,0,0,0,0,0,0,0,0,1
0.467486440,0,1,1,0,0,0,0,0,0,0,0,1
0.467486480,0,1,0,0,0,0,0,0,0,0,0,1
0.467486520,1,1,1,0,0,0,0,0,0,0,0,1
0.467587440,0,1,1,0,0,0,0,0,0,0,0,1
0.467587480,0,1,0,0,0,0,0,0,0,0,0,1
0.467587520,0,1,1,0,0,0,0,0,0,0,0,1
0.467587560,1,1,1,0,0,0,0,0,0,0,0,1
0.467688480,0,1,1,0,0,0,0,0,0,0,0,1
0.467688520,0,1,0,0,0,0,0,0,0,0,0,1
0.467688560,0,1,1,0,0,0,0,0,0,0,0,1
0.467688600,1,1,1,0,0,0,0,0,0,0,0,1
0.467790400,0,1,0,1,1,1,0,1,1,1,1,1
0.467790480,1,1,1,0,0,0,0,0,0,0,0,1
0.467891400,0,0,1,0,0,0,0,0,0,0,0,1
0.467891440,0,0,0,0,0,0,0,0,0,0,0,1
0.467891480,0,0,1,0,0,0,0,0,0,0,0,1
0.467891520,1,1,1,0,0,0,0,0,0,0,0,1
0.467992360,0,0,0,0,0,1,0,1,0,0,1,1
0.467992440,1,1,1,0,0,0,0,0,0,0,0,1
0.587952560,0,0,0,0,0,1,0,1,0,1,0,1
0.587952640,1,1,1,0,0,0,0,0,0,0,0,1
0.588053280,0,0,1,0,0,1,0,1,0,1,0,1
0.588053320,0,0,0,0,0,1,0,1,0,1,0,1
0.588053360,1,1,1,0,0,1,0,0,0,0,0,1

司徒寫了一隻Python用來解資料

#!/usr/bin/python
import os
import sys

f = open('digital.csv')
c = f.readlines()
f.close()

for x in c:
  l = x.replace('\r', '').replace('\n', '').split(',')
  t0 = l[0]
  cs = l[1]
  rs = l[2]
  wr = l[3]
  db = '0x%02x' % int(''.join('{:x}'.format(int(v)) for v in l[4:12]), 2)
  rst = l[12]

  if cs == '0' and wr == '0':
    if rs == '0':
      print 'CMD:{}'.format(db)
    else:
      print 'DAT:{}'.format(db)

解譯後的屏初始化資料

CMD:0x11
CMD:0x36
DAT:0x0c
CMD:0x3c
DAT:0x03
CMD:0x32
CMD:0x33
DAT:0x00
CMD:0xb4
DAT:0x0a
DAT:0x0a
DAT:0x00
DAT:0x35
DAT:0x35
CMD:0xb7
DAT:0x04
CMD:0xbd
DAT:0x30
CMD:0xc0
DAT:0x2a
CMD:0xc4
DAT:0x01
CMD:0xc5
DAT:0x17
CMD:0xc2
DAT:0x20
CMD:0xc6
DAT:0x0f
CMD:0xd0
DAT:0xa2
DAT:0xa1
CMD:0xd6
DAT:0xa1
CMD:0xe0
DAT:0xd0
DAT:0x02
DAT:0x0a
DAT:0x11
DAT:0x15
DAT:0x2a
DAT:0x3d
DAT:0x53
DAT:0x42
DAT:0x16
DAT:0x0b
DAT:0x0d
DAT:0x1f
DAT:0x25
CMD:0xe1
DAT:0xd0
DAT:0x02
DAT:0x0d
DAT:0x10
DAT:0x15
DAT:0x2a
DAT:0x3c
DAT:0x42
DAT:0x51
DAT:0x26
DAT:0x1f
DAT:0x1f
DAT:0x20
DAT:0x25
CMD:0x21
CMD:0x2c
DAT:0x00
DAT:0x00
DAT:0x00
DAT:0xef
CMD:0x2d
DAT:0x00
DAT:0x00
DAT:0x00
DAT:0xef
CMD:0x00
CMD:0x29
CMD:0x2a
CMD:0x2a

main.s

  .global _start
    
  .equiv PIO_BASE,  0x01c20800 
  .equiv PA,        (0x24 * 0)
  .equiv PB,        (0x24 * 1)
  .equiv PC,        (0x24 * 2)
  .equiv PD,        (0x24 * 3)
  .equiv PE,        (0x24 * 4)
  .equiv PIO_CFG0,  0x00
  .equiv PIO_CFG1,  0x04
  .equiv PIO_CFG2,  0x08
  .equiv PIO_DATA,  0x10
  
  .equiv LCD_CS,    (1 << 21)
  .equiv LCD_RD,    (1 << 20)
  .equiv LCD_RS,    (1 << 19)
  .equiv LCD_WR,    (1 << 18)
  .equiv LCD_RST,   (1 << 0)
  
  .arm
  .text
_start:
  .long 0xea000016
  .byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0'
  .long 0, __spl_size
  .byte 'S', 'P', 'L', 2
  .long 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
     
_vector:
  b reset
  b .
  b .
  b .
  b .
  b .
  b .
  b .
     
reset:
  ldr r4, =PIO_BASE + PD
  ldr r1, =0x11111111
  str r1, [r4, #PIO_CFG0]
  str r1, [r4, #PIO_CFG1]
  str r1, [r4, #PIO_CFG2]
   
  ldr r4, =PIO_BASE + PE
  ldr r1, =0x11111111
  str r1, [r4, #PIO_CFG0]
  str r1, [r4, #PIO_CFG1]
  str r1, [r4, #PIO_CFG2]
  
  ldr r4, =PIO_BASE + PD
  ldr r1, =0xffffffff
  str r1, [r4, #PIO_DATA]
  
  ldr r4, =PIO_BASE + PE
  ldr r1, =0xffffffff
  str r1, [r4, #PIO_DATA]
  
  bl lcd_rst
 
  ldr r0, =0x11
  bl lcd_cmd
  ldr r0, =0x36
  bl lcd_cmd
  ldr r1, =0x0c
  bl lcd_dat
  ldr r0, =0x3c
  bl lcd_cmd
  ldr r1, =0x03
  bl lcd_dat
  ldr r0, =0x32
  bl lcd_cmd
  ldr r0, =0x33
  bl lcd_cmd
  ldr r1, =0x00
  bl lcd_dat
  ldr r0, =0xb4
  bl lcd_cmd
  ldr r1, =0x0a
  bl lcd_dat
  ldr r1, =0x0a
  bl lcd_dat
  ldr r1, =0x00
  bl lcd_dat
  ldr r1, =0x35
  bl lcd_dat
  ldr r1, =0x35
  bl lcd_dat
  ldr r0, =0xb7
  bl lcd_cmd
  ldr r1, =0x04
  bl lcd_dat
  ldr r0, =0xbd
  bl lcd_cmd
  ldr r1, =0x30
  bl lcd_dat
  ldr r0, =0xc0
  bl lcd_cmd
  ldr r1, =0x2a
  bl lcd_dat
  ldr r0, =0xc4
  bl lcd_cmd
  ldr r1, =0x01
  bl lcd_dat
  ldr r0, =0xc5
  bl lcd_cmd
  ldr r1, =0x17
  bl lcd_dat
  ldr r0, =0xc2
  bl lcd_cmd
  ldr r1, =0x20
  bl lcd_dat
  ldr r0, =0xc6
  bl lcd_cmd
  ldr r1, =0x0f
  bl lcd_dat
  ldr r0, =0xd0
  bl lcd_cmd
  ldr r1, =0xa2
  bl lcd_dat
  ldr r1, =0xa1
  bl lcd_dat
  ldr r0, =0xd6
  bl lcd_cmd
  ldr r1, =0xa1
  bl lcd_dat
  ldr r0, =0xe0
  bl lcd_cmd
  ldr r1, =0xd0
  bl lcd_dat
  ldr r1, =0x02
  bl lcd_dat
  ldr r1, =0x0a
  bl lcd_dat
  ldr r1, =0x11
  bl lcd_dat
  ldr r1, =0x15
  bl lcd_dat
  ldr r1, =0x2a
  bl lcd_dat
  ldr r1, =0x3d
  bl lcd_dat
  ldr r1, =0x53
  bl lcd_dat
  ldr r1, =0x42
  bl lcd_dat
  ldr r1, =0x16
  bl lcd_dat
  ldr r1, =0x0b
  bl lcd_dat
  ldr r1, =0x0d
  bl lcd_dat
  ldr r1, =0x1f
  bl lcd_dat
  ldr r1, =0x25
  bl lcd_dat
  ldr r0, =0xe1
  bl lcd_cmd
  ldr r1, =0xd0
  bl lcd_dat
  ldr r1, =0x02
  bl lcd_dat
  ldr r1, =0x0d
  bl lcd_dat
  ldr r1, =0x10
  bl lcd_dat
  ldr r1, =0x15
  bl lcd_dat
  ldr r1, =0x2a
  bl lcd_dat
  ldr r1, =0x3c
  bl lcd_dat
  ldr r1, =0x42
  bl lcd_dat
  ldr r1, =0x51
  bl lcd_dat
  ldr r1, =0x26
  bl lcd_dat
  ldr r1, =0x1f
  bl lcd_dat
  ldr r1, =0x1f
  bl lcd_dat
  ldr r1, =0x20
  bl lcd_dat
  ldr r1, =0x25
  bl lcd_dat
  ldr r0, =0x21
  bl lcd_cmd
  ldr r0, =0x2c
  bl lcd_cmd
  ldr r1, =0x00
  bl lcd_dat
  ldr r1, =0x00
  bl lcd_dat
  ldr r1, =0x00
  bl lcd_dat
  ldr r1, =0xef
  bl lcd_dat
  ldr r0, =0x2d
  bl lcd_cmd
  ldr r1, =0x00
  bl lcd_dat
  ldr r1, =0x00
  bl lcd_dat
  ldr r1, =0x00
  bl lcd_dat
  ldr r1, =0xef
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_cmd
  ldr r0, =0x29
  bl lcd_cmd
  ldr r0, =0x2a
  bl lcd_cmd
  ldr r0, =0x2a
  bl lcd_cmd
 
  ldr r4, =240*180
  ldr r5, =0xffff
0:
  lsr r0, r5, #8
  bl lcd_dat
  mov r0, r5
  bl lcd_dat
  subs r4, #1
  bne 0b
 
loop:
  b loop
 
delay:
  push {lr}
0:
  subs r0, #1
  bne 0b
  pop {pc}
  
lcd_rst:
  push {r4, r5, lr}
  ldr r4, =PIO_BASE + PD
  ldr r5, =0xffffffff
  
  bic r5, #LCD_RST
  str r5, [r4, #PIO_DATA]
  ldr r0, =10000
  bl delay
  
  orr r5, #LCD_RST
  str r5, [r4, #PIO_DATA]
  ldr r0, =10000
  bl delay
  pop {r4, r5, pc}
  
lcd_wr:
  push {r4, r5, lr}
  ldr r4, =PIO_BASE + PD
 
  and r0, #0xff
  lsl r0, #1
  mov r5, r0
  orr r5, r1
  orr r5, #LCD_RST
  orr r5, #LCD_RD
  str r5, [r4, #PIO_DATA]
  
  orr r5, #LCD_WR
  str r5, [r4, #PIO_DATA]
  pop {r4, r5, pc}
  
lcd_dat:
  push {lr}
  mov r1, #LCD_RS
  bl lcd_wr
  pop {pc}
  
lcd_cmd:
  push {lr}
  mov r1, #0
  bl lcd_wr
  pop {pc}
  .end

main.ld

OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)

MEMORY {
  ram : ORIGIN = 0x00000000, LENGTH = 32M
}

SECTIONS {
  .text :
  {
    PROVIDE(__spl_start = .);
    *(.text*)
    PROVIDE(__spl_end = .);
    *(.init.text)
    *(.exit.text)
    *(.glue*)
    *(.note.gnu.build-id)
  } > ram
  PROVIDE(__spl_size = __spl_end - __spl_start);

  .rodata ALIGN(8) :
  {
    PROVIDE(__rodata_start = .);
    *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
    PROVIDE(__rodata_end = .);
  } > ram

  .data ALIGN(8) :
  {
    PROVIDE(__data_start = .);  
    *(.data*)
    . = ALIGN(8);
      PROVIDE(__data_end = .);
    PROVIDE(__image_end = .);
  } > ram

  .bss ALIGN(8) (NOLOAD) :
  {
    PROVIDE(__bss_start = .);
    *(.bss*)
    *(.sbss*)
    *(COMMON)
    . = ALIGN(8);
    PROVIDE(__bss_end = .);
  } > ram

  .stab 0 : { *(.stab) }
  .stabstr 0 : { *(.stabstr) }
  .stab.excl 0 : { *(.stab.excl) }
  .stab.exclstr 0 : { *(.stab.exclstr) }
  .stab.index 0 : { *(.stab.index) }
  .stab.indexstr 0 : { *(.stab.indexstr) }
  .comment 0 : { *(.comment) }
  .debug_abbrev 0 : { *(.debug_abbrev) }
  .debug_info 0 : { *(.debug_info) }
  .debug_line 0 : { *(.debug_line) }
  .debug_pubnames 0 : { *(.debug_pubnames) }
  .debug_aranges 0 : { *(.debug_aranges) }
}

Makefile

all:
  arm-none-eabi-as -mcpu=arm9 -o main.o main.s
  arm-none-eabi-ld -T main.ld -o main.elf main.o
  arm-none-eabi-objcopy -O binary main.elf main.bin
  gcc mksunxi.c -o mksunxi
  ./mksunxi main.bin

ram:
  sunxi-fel -p write 0 main.bin && sunxi-fel exec 0

clean:
  rm -rf main.bin main.o main.elf

進入下載模式

編譯下載

$ make
  arm-none-eabi-as -mcpu=arm9 -o main.o main.s
  arm-none-eabi-ld -T main.ld -o main.elf main.o
  arm-none-eabi-objcopy -O binary main.elf main.bin
  gcc mksunxi.c -o mksunxi
  ./mksunxi main.bin
  The bootloader head has been fixed, spl size is 1024 bytes.

$ make ram
  sunxi-fel -p write 0 main.bin && sunxi-fel exec 0
  100% [================================================]     1 kB,  167.0 kB/s

這...，讓司徒又陷入難點，應該是要顯示全白才對，從這個畫面顯示結果，代表屏初始化有問題，經過幾番查找，司徒發現一般屏的最後一道命令應該是0x2C，而且設定位址的命令一般是0x2A、0x2B，因此，比對了一下，司徒應該是記錯DB1和DB2的位置，導致解析錯誤

修正DB1和DB2

#!/usr/bin/python
import os
import sys

f = open('digital.csv')
c = f.readlines()
f.close()

for x in c:
  l = x.replace('\r', '').replace('\n', '').split(',')
  t0 = l[0]
  cs = l[1]
  rs = l[2]
  wr = l[3]
  t = l[9]
  l[9] = l[10]
  l[10] = t
  db = '0x%02x' % int(''.join('{:x}'.format(int(v)) for v in l[4:12]), 2)
  rst = l[12]

  if cs == '0' and wr == '0':
    if rs == '0':
      print 'CMD:{}'.format(db)
    else:
      print 'DAT:{}'.format(db)

最後一道命令是0x2C了～

CMD:0x11
CMD:0x36
DAT:0x0a
CMD:0x3a
DAT:0x05
CMD:0x34
CMD:0x35
DAT:0x00
CMD:0xb2
DAT:0x0c
DAT:0x0c
DAT:0x00
DAT:0x33
DAT:0x33
CMD:0xb7
DAT:0x02
CMD:0xbb
DAT:0x30
CMD:0xc0
DAT:0x2c
CMD:0xc2
DAT:0x01
CMD:0xc3
DAT:0x17
CMD:0xc4
DAT:0x20
CMD:0xc6
DAT:0x0f
CMD:0xd0
DAT:0xa4
DAT:0xa1
CMD:0xd6
DAT:0xa1
CMD:0xe0
DAT:0xd0
DAT:0x04
DAT:0x0c
DAT:0x11
DAT:0x13
DAT:0x2c
DAT:0x3b
DAT:0x55
DAT:0x44
DAT:0x16
DAT:0x0d
DAT:0x0b
DAT:0x1f
DAT:0x23
CMD:0xe1
DAT:0xd0
DAT:0x04
DAT:0x0b
DAT:0x10
DAT:0x13
DAT:0x2c
DAT:0x3a
DAT:0x44
DAT:0x51
DAT:0x26
DAT:0x1f
DAT:0x1f
DAT:0x20
DAT:0x23
CMD:0x21
CMD:0x2a
DAT:0x00
DAT:0x00
DAT:0x00
DAT:0xef
CMD:0x2b
DAT:0x00
DAT:0x00
DAT:0x00
DAT:0xef
CMD:0x00
CMD:0x29
CMD:0x2c
CMD:0x2c

main.s

  .global _start
   
  .equiv PIO_BASE,  0x01c20800 
  .equiv PA,        (0x24 * 0)
  .equiv PB,        (0x24 * 1)
  .equiv PC,        (0x24 * 2)
  .equiv PD,        (0x24 * 3)
  .equiv PE,        (0x24 * 4)
  .equiv PIO_CFG0,  0x00
  .equiv PIO_CFG1,  0x04
  .equiv PIO_CFG2,  0x08
  .equiv PIO_DATA,  0x10
 
  .equiv LCD_CS,    (1 << 21)
  .equiv LCD_RD,    (1 << 20)
  .equiv LCD_RS,    (1 << 19)
  .equiv LCD_WR,    (1 << 18)
  .equiv LCD_RST,   (1 << 0)
 
  .arm
  .text
_start:
  .long 0xea000016
  .byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0'
  .long 0, __spl_size
  .byte 'S', 'P', 'L', 2
  .long 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
    
_vector:
  b reset
  b .
  b .
  b .
  b .
  b .
  b .
  b .
    
reset:
  ldr r4, =PIO_BASE + PD
  ldr r1, =0x11111111
  str r1, [r4, #PIO_CFG0]
  str r1, [r4, #PIO_CFG1]
  str r1, [r4, #PIO_CFG2]
  
  ldr r4, =PIO_BASE + PE
  ldr r1, =0x11111111
  str r1, [r4, #PIO_CFG0]
  str r1, [r4, #PIO_CFG1]
  str r1, [r4, #PIO_CFG2]
 
  ldr r4, =PIO_BASE + PD
  ldr r1, =0xffffffff
  str r1, [r4, #PIO_DATA]
 
  ldr r4, =PIO_BASE + PE
  ldr r1, =0xffffffff
  str r1, [r4, #PIO_DATA]
 
  bl lcd_rst

  ldr r0, =0x11
  bl lcd_cmd
  ldr r0, =0x36
  bl lcd_cmd
  ldr r0, =0x0a
  bl lcd_dat
  ldr r0, =0x3a
  bl lcd_cmd
  ldr r0, =0x05
  bl lcd_dat
  ldr r0, =0x34
  bl lcd_cmd
  ldr r0, =0x35
  bl lcd_cmd
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0xb2
  bl lcd_cmd
  ldr r0, =0x0c
  bl lcd_dat
  ldr r0, =0x0c
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x33
  bl lcd_dat
  ldr r0, =0x33
  bl lcd_dat
  ldr r0, =0xb7
  bl lcd_cmd
  ldr r0, =0x02
  bl lcd_dat
  ldr r0, =0xbb
  bl lcd_cmd
  ldr r0, =0x30
  bl lcd_dat
  ldr r0, =0xc0
  bl lcd_cmd
  ldr r0, =0x2c
  bl lcd_dat
  ldr r0, =0xc2
  bl lcd_cmd
  ldr r0, =0x01
  bl lcd_dat
  ldr r0, =0xc3
  bl lcd_cmd
  ldr r0, =0x17
  bl lcd_dat
  ldr r0, =0xc4
  bl lcd_cmd
  ldr r0, =0x20
  bl lcd_dat
  ldr r0, =0xc6
  bl lcd_cmd
  ldr r0, =0x0f
  bl lcd_dat
  ldr r0, =0xd0
  bl lcd_cmd
  ldr r0, =0xa4
  bl lcd_dat
  ldr r0, =0xa1
  bl lcd_dat
  ldr r0, =0xd6
  bl lcd_cmd
  ldr r0, =0xa1
  bl lcd_dat
  ldr r0, =0xe0
  bl lcd_cmd
  ldr r0, =0xd0
  bl lcd_dat
  ldr r0, =0x04
  bl lcd_dat
  ldr r0, =0x0c
  bl lcd_dat
  ldr r0, =0x11
  bl lcd_dat
  ldr r0, =0x13
  bl lcd_dat
  ldr r0, =0x2c
  bl lcd_dat
  ldr r0, =0x3b
  bl lcd_dat
  ldr r0, =0x55
  bl lcd_dat
  ldr r0, =0x44
  bl lcd_dat
  ldr r0, =0x16
  bl lcd_dat
  ldr r0, =0x0d
  bl lcd_dat
  ldr r0, =0x0b
  bl lcd_dat
  ldr r0, =0x1f
  bl lcd_dat
  ldr r0, =0x23
  bl lcd_dat
  ldr r0, =0xe1
  bl lcd_cmd
  ldr r0, =0xd0
  bl lcd_dat
  ldr r0, =0x04
  bl lcd_dat
  ldr r0, =0x0b
  bl lcd_dat
  ldr r0, =0x10
  bl lcd_dat
  ldr r0, =0x13
  bl lcd_dat
  ldr r0, =0x2c
  bl lcd_dat
  ldr r0, =0x3a
  bl lcd_dat
  ldr r0, =0x44
  bl lcd_dat
  ldr r0, =0x51
  bl lcd_dat
  ldr r0, =0x26
  bl lcd_dat
  ldr r0, =0x1f
  bl lcd_dat
  ldr r0, =0x1f
  bl lcd_dat
  ldr r0, =0x20
  bl lcd_dat
  ldr r0, =0x23
  bl lcd_dat
  ldr r0, =0x21
  bl lcd_cmd
  ldr r0, =0x2a
  bl lcd_cmd
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0xef
  bl lcd_dat
  ldr r0, =0x2b
  bl lcd_cmd
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0xef
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_cmd
  ldr r0, =0x29
  bl lcd_cmd
  ldr r0, =0x2c
  bl lcd_cmd
  ldr r0, =0x2c
  bl lcd_cmd

  ldr r4, =240*180
  ldr r5, =0xffff
0:
  lsr r0, r5, #8
  bl lcd_dat
  mov r0, r5
  bl lcd_dat
  subs r4, #1
  bne 0b

loop:
  b loop

delay:
  push {lr}
0:
  subs r0, #1
  bne 0b
  pop {pc}
 
lcd_rst:
  push {r4, r5, lr}
  ldr r4, =PIO_BASE + PD
  ldr r5, =0xffffffff
 
  bic r5, #LCD_RST
  str r5, [r4, #PIO_DATA]
  ldr r0, =10000
  bl delay
 
  orr r5, #LCD_RST
  str r5, [r4, #PIO_DATA]
  ldr r0, =10000
  bl delay
  pop {r4, r5, pc}
 
lcd_wr:
  push {r4, r5, lr}
  ldr r4, =PIO_BASE + PD

  and r0, #0xff
  lsl r0, #1
  mov r5, r0
  orr r5, r1
  orr r5, #LCD_RST
  orr r5, #LCD_RD
  str r5, [r4, #PIO_DATA]
 
  orr r5, #LCD_WR
  str r5, [r4, #PIO_DATA]
  pop {r4, r5, pc}
 
lcd_dat:
  push {lr}
  mov r1, #LCD_RS
  bl lcd_wr
  pop {pc}
 
lcd_cmd:
  push {lr}
  mov r1, #0
  bl lcd_wr
  pop {pc}
  .end

終於顯示白屏了～但是，怎麼沒有全屏？司徒往回找了一下，發現這個屏的初始化命令(解析度)竟然是使用240x240...

司徒開始探測問題，發現屏的上方有一塊區域被隱蔽(前30行)

下方也有一塊區域被隱蔽(後15行)

經過一番測試後，結論是：屏的原生解析度是240x240，不過，可視區域只有240x195，最後，屏終於可以正常控制了～

main.s

  .global _start
    
  .equiv PIO_BASE,  0x01c20800 
  .equiv PA,        (0x24 * 0)
  .equiv PB,        (0x24 * 1)
  .equiv PC,        (0x24 * 2)
  .equiv PD,        (0x24 * 3)
  .equiv PE,        (0x24 * 4)
  .equiv PIO_CFG0,  0x00
  .equiv PIO_CFG1,  0x04
  .equiv PIO_CFG2,  0x08
  .equiv PIO_DATA,  0x10
  
  .equiv LCD_CS,    (1 << 21)
  .equiv LCD_RD,    (1 << 20)
  .equiv LCD_RS,    (1 << 19)
  .equiv LCD_WR,    (1 << 18)
  .equiv LCD_RST,   (1 << 0)
  
  .arm
  .text
_start:
  .long 0xea000016
  .byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0'
  .long 0, __spl_size
  .byte 'S', 'P', 'L', 2
  .long 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
     
_vector:
  b reset
  b .
  b .
  b .
  b .
  b .
  b .
  b .
     
reset:
  ldr r4, =PIO_BASE + PD
  ldr r1, =0x11111111
  str r1, [r4, #PIO_CFG0]
  str r1, [r4, #PIO_CFG1]
  str r1, [r4, #PIO_CFG2]
   
  ldr r4, =PIO_BASE + PE
  ldr r1, =0x11111111
  str r1, [r4, #PIO_CFG0]
  str r1, [r4, #PIO_CFG1]
  str r1, [r4, #PIO_CFG2]
  
  ldr r4, =PIO_BASE + PD
  ldr r1, =0xffffffff
  str r1, [r4, #PIO_DATA]
  
  ldr r4, =PIO_BASE + PE
  ldr r1, =0xffffffff
  str r1, [r4, #PIO_DATA]
  
  bl lcd_rst
 
  ldr r0, =0x11
  bl lcd_cmd
  ldr r0, =0x36
  bl lcd_cmd
  ldr r0, =0x0a
  bl lcd_dat
  ldr r0, =0x3a
  bl lcd_cmd
  ldr r0, =0x05
  bl lcd_dat
  ldr r0, =0x34
  bl lcd_cmd
  ldr r0, =0x35
  bl lcd_cmd
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0xb2
  bl lcd_cmd
  ldr r0, =0x0c
  bl lcd_dat
  ldr r0, =0x0c
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x33
  bl lcd_dat
  ldr r0, =0x33
  bl lcd_dat
  ldr r0, =0xb7
  bl lcd_cmd
  ldr r0, =0x02
  bl lcd_dat
  ldr r0, =0xbb
  bl lcd_cmd
  ldr r0, =0x30
  bl lcd_dat
  ldr r0, =0xc0
  bl lcd_cmd
  ldr r0, =0x2c
  bl lcd_dat
  ldr r0, =0xc2
  bl lcd_cmd
  ldr r0, =0x01
  bl lcd_dat
  ldr r0, =0xc3
  bl lcd_cmd
  ldr r0, =0x17
  bl lcd_dat
  ldr r0, =0xc4
  bl lcd_cmd
  ldr r0, =0x20
  bl lcd_dat
  ldr r0, =0xc6
  bl lcd_cmd
  ldr r0, =0x0f
  bl lcd_dat
  ldr r0, =0xd0
  bl lcd_cmd
  ldr r0, =0xa4
  bl lcd_dat
  ldr r0, =0xa1
  bl lcd_dat
  ldr r0, =0xd6
  bl lcd_cmd
  ldr r0, =0xa1
  bl lcd_dat
  ldr r0, =0xe0
  bl lcd_cmd
  ldr r0, =0xd0
  bl lcd_dat
  ldr r0, =0x04
  bl lcd_dat
  ldr r0, =0x0c
  bl lcd_dat
  ldr r0, =0x11
  bl lcd_dat
  ldr r0, =0x13
  bl lcd_dat
  ldr r0, =0x2c
  bl lcd_dat
  ldr r0, =0x3b
  bl lcd_dat
  ldr r0, =0x55
  bl lcd_dat
  ldr r0, =0x44
  bl lcd_dat
  ldr r0, =0x16
  bl lcd_dat
  ldr r0, =0x0d
  bl lcd_dat
  ldr r0, =0x0b
  bl lcd_dat
  ldr r0, =0x1f
  bl lcd_dat
  ldr r0, =0x23
  bl lcd_dat
  ldr r0, =0xe1
  bl lcd_cmd
  ldr r0, =0xd0
  bl lcd_dat
  ldr r0, =0x04
  bl lcd_dat
  ldr r0, =0x0b
  bl lcd_dat
  ldr r0, =0x10
  bl lcd_dat
  ldr r0, =0x13
  bl lcd_dat
  ldr r0, =0x2c
  bl lcd_dat
  ldr r0, =0x3a
  bl lcd_dat
  ldr r0, =0x44
  bl lcd_dat
  ldr r0, =0x51
  bl lcd_dat
  ldr r0, =0x26
  bl lcd_dat
  ldr r0, =0x1f
  bl lcd_dat
  ldr r0, =0x1f
  bl lcd_dat
  ldr r0, =0x20
  bl lcd_dat
  ldr r0, =0x23
  bl lcd_dat
  ldr r0, =0x21
  bl lcd_cmd
  ldr r0, =0x2a
  bl lcd_cmd
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0xef
  bl lcd_dat
  ldr r0, =0x2b
  bl lcd_cmd
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_dat
  ldr r0, =0xef
  bl lcd_dat
  ldr r0, =0x00
  bl lcd_cmd
  ldr r0, =0x29
  bl lcd_cmd
  ldr r0, =0x2c
  bl lcd_cmd
  ldr r0, =0x2c
  bl lcd_cmd
 
  ldr r4, =240*30
  ldr r5, =0xffff
0:
  lsr r0, r5, #8
  bl lcd_dat
  mov r0, r5
  bl lcd_dat
  subs r4, #1
  bne 0b
 
  ldr r4, =240*65
  ldr r5, =0xf800
0:
  lsr r0, r5, #8
  bl lcd_dat
  mov r0, r5
  bl lcd_dat
  subs r4, #1
  bne 0b
 
  ldr r4, =240*65
  ldr r5, =0x7e0
0:
  lsr r0, r5, #8
  bl lcd_dat
  mov r0, r5
  bl lcd_dat
  subs r4, #1
  bne 0b
 
  ldr r4, =240*65
  ldr r5, =0x1f
0:
  lsr r0, r5, #8
  bl lcd_dat
  mov r0, r5
  bl lcd_dat
  subs r4, #1
  bne 0b
 
loop:
  b loop
 
delay:
  push {lr}
0:
  subs r0, #1
  bne 0b
  pop {pc}
  
lcd_rst:
  push {r4, r5, lr}
  ldr r4, =PIO_BASE + PD
  ldr r5, =0xffffffff
  
  bic r5, #LCD_RST
  str r5, [r4, #PIO_DATA]
  ldr r0, =10000
  bl delay
  
  orr r5, #LCD_RST
  str r5, [r4, #PIO_DATA]
  ldr r0, =10000
  bl delay
  pop {r4, r5, pc}
  
lcd_wr:
  push {r4, r5, lr}
  ldr r4, =PIO_BASE + PD
 
  and r0, #0xff
  lsl r0, #1
  mov r5, r0
  orr r5, r1
  orr r5, #LCD_RST
  orr r5, #LCD_RD
  str r5, [r4, #PIO_DATA]
  
  orr r5, #LCD_WR
  str r5, [r4, #PIO_DATA]
  pop {r4, r5, pc}
  
lcd_dat:
  push {lr}
  mov r1, #LCD_RS
  bl lcd_wr
  pop {pc}
  
lcd_cmd:
  push {lr}
  mov r1, #0
  bl lcd_wr
  pop {pc}
  .end

司徒 · 2022-03-14 07:25:50

根據此GitHub：https://github.com/ethanpierce/gamegearmicrohack
此人似乎早知道這個屏是ST7789，而經由分析結果，屏也確實是ST7789～

怀旧堂 · 2022-03-14 07:52:18

我觉得TF卡可以不用这么麻烦，直接拆了之前的FLASH，tf卡走SPI是否可行。。。

司徒 · 2022-03-14 09:54:27

想保留原本Flash才沒有動刀，不過，如果MicroSD改造失敗，這個選項可以～

怀旧堂 · 2022-03-14 10:40:20

司徒说：

想保留原本Flash才沒有動刀，不過，如果MicroSD改造失敗，這個選項可以～

也可以共存吧，用不同的CS脚，引导的时候处理下。单独飞线这么多脚，劝退了大部分想改机的小伙伴啊。。:lol:

司徒 · 2022-03-14 11:15:51

聽君一席話，更勝十年書～

司徒 · 2022-03-14 16:35:23

雖然"怀旧堂"企圖想把改造難度，從中上拉到下下等級，不過，司徒今天剛好打完疫苗，請假在家休息，想測試下，手是否會有抖動的問題，因此，司徒還是按照原本計畫進行改機～

由於目標是跑GBA模擬器，因此，至少還需要4個按鍵，司徒把PD13、PD14拿出來當作按鍵使用

膠帶固定

接著安裝MicroSD

MicroSD腳位對應圖

MicroSD使用4bits模式，PE2、PE3也拉出來當做按鍵使用

總共跳了10根線

MicroSD VDD、GND接到Flash IC

四顆按鍵

固定FPC，避免損壞

肉雞定位完成

預計擺放位置

完成開鑿

固定按鍵

背面

開始整線

整線完成

由於MicroSD位置太下方，背蓋需要動刀

上邊缺口部份，之後有時間可以使用3D列印機補齊

UART擺放在MicroSD上方

整體評分還算可以

上方醜了點

可以從MicroSD開機，終於，完美的開發機誕生～

可能有人會好奇，司徒的焊接工具是不是很高級，可以飛出那麼細的線，其實，司徒使用很便宜的焊槍，而且也用了快五年～

銲錫的部份，使用比較好一點點的日本制銲錫～

司徒 · 2022-03-14 20:59:56

洞口太大，司徒決定修補一下

OpenSCAD

difference(){
  cube([16, 6.5, 2]);
  translate([2, 4, 0]){
    cube([8, 2, 3]);
  }
  translate([2, 2, 0]){
    cube([12, 2, 3]);
  }
}
cube([18, 2.5, 2]);

預覽圖

3D列印

相當合適的大小

完美的修補

相當工整

插入MicroSD也沒有凸出

hox · 2022-03-15 09:51:51

司徒老兄看样子最近比较闲了，高产ing

司徒 · 2022-03-15 20:59:55

@hox
哈哈～

其實最難的地方是飛線，一旦飛線完成，接下來就是慢慢體驗美好的果實～
司徒目前開始製作多重開機選單，一個是原廠系統，另一個則是跑GBA模擬器

司徒 · 2022-03-16 08:42:08

量測後的對應腳位

Game Gear Micro | F1C200S
----------------+--------
UP              | PE5
DOWN            | PE7
LEFT            | PE6
RIGHT           | PE8
START(BLUE)     | PE11
1               | PE9
2               | PE10
L1(MOD)         | PE2
R1(MOD)         | PD13
SELECT(MOD)     | PE3
START(MOD)      | PD14
LCD RST         | PD0
LCD DB0         | PD1
LCD DB1         | PD2
LCD DB2         | PD3
LCD DB3         | PD4
LCD DB4         | PD5
LCD DB5         | PD6
LCD DB6         | PD7
LCD DB7         | PD8
LCD TE          | PD9
LCD BL          | PE12
FLASH MOSI      | PC3
FLASH MISO      | PC2
FLASH CS        | PC1
FLASH SCK       | PC0

mrnull · 2022-03-19 16:36:02

大佬有没有研究过炬力平台的掌机？比如山寨psp（atj227X系列的cpu）？

huanxing · 2022-03-20 18:12:21

@司徒
哈！真的开始弄GGM了，这个非常期待，可能成为最小的开源小机机，国外在不改动机的情况下，好像能拷入少量仅.gg游戏，且每次需线刷换游戏，还是麻烦。让GGM更大的发挥还是需增加卡槽的必要，司徒大哥给力！

司徒 · 2022-03-21 19:08:44

@mrnull
之前有研究過，可惜沒有過多資料被公開，只能放生～

@huanxing
故意搞一個很難的改機，沒有人可以跟上，所以我就可以慢慢搞～

huanxing · 2022-03-21 20:19:50

跟着大神的步伐！或者可加快点，我这小白程序看不懂，哈！！有空我看看这个肩键，能否加。:)

最近编辑记录 huanxing (2022-03-21 20:41:48)

鳝丝与螺丝 · 2022-03-21 20:45:18

司徒说：

@mrnull
之前有研究過，可惜沒有過多資料被公開，只能放生～
@huanxing
故意搞一個很難的改機，沒有人可以跟上，所以我就可以慢慢搞～

司徒最近有空了?

司徒 · 2022-03-22 13:01:13

@huanxing
OK

@鳝丝与螺丝
最近有些事情要處理～沒有空～

fullniz · 2022-03-24 00:45:20

我菜发现这个帖子,这个掌机的改机难度对于我这种普通人来说就是噩梦级
这个分辨率是不是只能移植gb模拟器,snk模拟器不行?我看有两个按钮和按钮上方的start键,
玩mslug还可以,对应子弹+跳+炸弹,start即使不对应炸弹,2个按钮也能凑合玩,就是分辨率不太合适是吧

huanxing · 2022-03-24 09:50:13

@司徒
如按国外那方案刷过系统的情况后，对你这双系统启动会否兼容

司徒 · 2022-03-24 10:29:55

@fullniz
我目標只有GBA模擬器，不過，結束後，我會全部開源出來給大家使用，如果想搗鼓，可以先改機～

@huanxing
NAND Flash我不會去動它，預設使用MicroSD開機，開機後，可以選擇從NAND或MicroSD進入系統，所以國外那個方案可以使用的～

mrnull · 2022-03-26 01:06:24

司徒说：

@mrnull
之前有研究過，可惜沒有過多資料被公開，只能放生～

@司徒
那大佬搞搞gpi case要不？

司徒 · 2022-03-26 11:46:21

@mrnull
沒興趣～

司徒 · 2022-04-21 21:13:37

@哇酷小二
圖片問題，原本不想再更新了～但是，竟然修好了～哈哈～太感謝了，小弟會繼續更新的～哈哈

huanxing · 2022-04-24 13:04:42

@司徒
这贴看你暂缓很久没更新了！

司徒 · 2022-05-03 13:11:42

@huanxing
在等我一會兒～

xiaoyu356 · 2022-05-17 23:08:55

司徒说：

串口有PCB焊點
今年剛滿２０歲～

技术流啊 20岁就这么厉害我正好是你的一倍哈哈

WhyCan Forum(哇酷开发者社区)

楼主 # 2022-03-08 08:08:44 分享评论

研究Game Gear Micro掌機的開源可行性

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