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doc(dev/journal): Add notes when working on the P3IO driver
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doc/dev/journal/2023-05-28-ddr-p3io-driver-work.md
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doc/dev/journal/2023-05-28-ddr-p3io-driver-work.md
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# DDR p3io driver work, various notes
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Date: 2023-05-28
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Author: icex2
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Notes about my work on writing a DDR P3io driver.
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## Python IO board hardware breakout interface
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PCB breakout interfaces/connectors on the side of the boards.
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### P2IO DDR
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Descriptions assume cabinet hardware of an upgraded DDR "black SD cabinet"
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* `LINE OUT 1`: Primary audio out to amplifier
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* `LINE OUT 2`: N.C.
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* `RGB`: Video out to monitor, supports 15khz/31khz based on hardware switch for video freq/mode selection
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* `COM1`: Virtual com port that connects to the EXTIO
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* `COM2`: Virtual com port that connects to a pair of ICCA card readers
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* `LAN`: Network connection
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* `PWR`: 100V power in
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* `ANALOG`: N.C.
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* `PORT 1`: Lights output for cabinet lights, e.g. menu button lights, top header lights
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* `PORT 2`: N.C.
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* `DIPSW`
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* `1`: ???
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* `2`: On = force all sensor polling mode and allow running the game without an EXTIO
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* `3`: ???
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* `4`: On = force 15 khz monitor output
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* `PLUG 1`: Black dongle
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* `PLUG 2`: White dongle
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### P3IO GF/DM
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Descriptions assume usage of a P3IO from a GF/DM in a "chimera style PCB build" on an upgraded
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DDR "black SD cabinet"
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* `PWR`: 100V power in
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* `12V-OUT`: +12V out for external devices
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* `PORT 1`: Lights output for cabinet lights, e.g. menu button lights, top header lights
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* `PORT 2`: N.C.
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* `COM1`: To EXTIO
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* `COM2`: To card readers
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* `RGB`: Video out to monitor, supports 15khz/31khz based on hardware switch for video freq/mode selection
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* `LINE OUT 1`: Primary audio out to amplifier
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* `LINE OUT 2`: N.C.
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* `DIPSW`
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* `1`:
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* `2`:
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* `3`:
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* `4`: On = force 15 khz monitor output
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* `PLUG 1`: Roundplug black dongle
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* `PLUG 2`: Roundplug white dongle
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### P3IO DDR(X)
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Descriptions assume cabinet hardware of an upgraded DDR "black SD cabinet"
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* `PWR`: 100V power in
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* `USB`: USB memory card readers on cabinet
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* `PORT 1`: Lights output for cabinet lights, e.g. menu button lights, top header lights
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* `COM3-4`: Virtual COM ports
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* COM3 (VCOM1): Pins 1,3,5 on connector -> To card readers
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* COM4 (VCOM0): Pins 2,4,6 on connector -> N.C.
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* `PLUG`: Breakout to security round plugs (black and white dongles)
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* `COM1`: To EXTIO
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* Pinout (pins left to right)
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* 1: TXD1
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* 2: RXD1
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* 3: N.C.
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* 4: N.C.
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* 5: GND
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* `COM2`: N/A (light spires on black HD cabinet)
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* Pinout (pins left to right)
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* 1: TXD2
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* 2: RXD2
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* 3: GND
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* `RGB`: Video out to monitor, supports 15khz/31khz based on hardware switch for video freq/mode selection
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* `LINE OUT1`: Primary audio out to amplifier
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* `LINE OUT2`: N.C.
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* `LAN`: Network
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* `DIP SW`
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* `1`:
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* `2`:
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* `3`:
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* `4`: On = force 15 khz monitor output
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## Python IO boards and differences
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### P3IO DDR(X)
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* Connects to USB and actually enumerates as a USB device and not a virtual COM port
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* COM ports 1-4 on breakout of the PCB are being passed through as actual COM ports to the operating system
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### P3IO GF/DM
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* Connects to USB and actually enumerates as a USB device and not a virtual COM port
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* COM ports 1-2 on breakout of the PCB are just virtual COM ports
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* These do not show up as COM ports on the operating system
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* The game drives the COM ports through the main P3IO protocol with additional P3IO commands
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to open, read, write and close these virtual COM ports
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### P2IO DDR
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* Connects to USB and actually enumerates as a USB device and not a virtual COM port
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* COM ports 1-2 on breakout of the PCB are just virtual COM ports
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* These do not show up as COM ports on the operating system
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* The game drives the COM ports through the main P3IO protocol with additional P3IO commands
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to open, read, write and close these virtual COM ports
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## Pinout card reader P1 -> P2 mini din8 male to mini din8 male
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Port 1 2 and 3:
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* Pin 3: TX
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* Pin 4: GND
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* Pin 5 : RX
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Pin 3 and 5 need to be reversed inbetween readers
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They are all the same, so your cable needs to bridge them over.
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A standard male to male mini din 8 cable does not do that.
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### Pinout card reader stock cable s-sub9 to round pin9
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```text
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dsub-9 female -> mini-din8 male
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2 (TXD) -> 3
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3 (RXD) -> 5
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5 (GND) -> 4
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```
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## ADE board and com port assignments
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Default or incorrectly configured?
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* `COM1` -> on mainboard
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* `COM2` -> COM2 on P3IO breakout
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* `COM3` -> ???
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* `COM4` -> COM1 on P3IO breakout
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## P3IO command init sequence on DDR 18
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From the ddrio-python23 library
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```text
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.data:1002D5D0 g_init_pakets db 0AAh, 2, 0, 1, 29h dup(0); field_0.field_0
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.data:1002D5D0 ; DATA XREF: initialize_and_send_pakets+5↑o
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.data:1002D5D0 db 0AAh, 2, 0, 2Fh, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 3, 1, 27h, 1, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2 dup(2), 31h, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2, 3, 1, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 3, 4, 27h, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 5, 25h, 10h, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 6, 25h, 10h, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 7, 25h, 10h, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 8, 25h, 10h, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 9, 25h, 10h, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 0Ah, 25h, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 0Bh, 25h, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 0Ch, 25h, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 0Dh, 25h, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2Bh, 0Eh, 25h, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 3, 0Fh, 5, 29h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 3, 0, 2Bh, 1, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 3, 1, 29h, 5, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 3, 2, 5, 30h, 28h dup(0); field_0.field_0
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.data:1002D5D0 db 0AAh, 2 dup(3), 27h, 29h dup(0); field_0.field_0
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``
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```text
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// 01: get version <- this is part of a "flush" of old data?
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// 2F: set mode
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// 27: get cab type or dispsw
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// 31: get coinstock
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// 1: get version
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// 27: get cab type or dipsw
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 25: read plug
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// 5: set watchdog
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// 2b: unknown
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// 29: get video freq
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// 5: set watchdog
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// 27: get cab type or dipsw
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```
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