Attack of the clones - Keysight 82357B edition

I got an obvious fake 82357B from ebay. It's branded Keysight but when I
opened it up it has a lasered 64-pin TQFP IC and a few passives and that's
it.

I tried it with the agilent_82357a driver. gpib_config succeeds but it
doesn't really work. All 3 LEDs remain lit.

When plugged in, the USB ID is 0957:0718 Agilent Technologies, Inc. 82357B
GPIB Interface. So it's not booting as 0957:0518 awaiting for firmware. I
believe genuine ones will always boot as bootloader and then firmware will
be uploaded.

I thought I may be able to upload a different firmware but without any SMD
markings, it's impossible to tell if this is even a Cypress device that can
be programmed with fxload.

full lsusb dump:

sudo lsusb -vd 0957:0718

Bus 003 Device 003: ID 0957:0718 Agilent Technologies, Inc. 82357B GPIB
Interface
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0957 Agilent Technologies, Inc.
  idProduct          0x0718 82357B GPIB Interface
  bcdDevice            0.00
  iManufacturer           1 Agilent Technologies, Inc.
  iProduct                2 82357B ()
  iSerial                 5 MY54153256
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0027
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          3 HIGHSPEED
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass         0
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x06  EP 6 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)

When trying to open the device in board mode:

ibtest
Do you wish to open a (d)evice or an interface (b)oard?
(you probably want to open a device): d
enter primary gpib address for device you wish to open [0-30]: usb
trying to open pad = 0 on /dev/gpib0 ...
ibdev: address conflict with board pad
ibdev error

ibsta = 0x100  < CMPL >
iberr= 4

ibcntl = 0
Aborted (core dumped)

When trying to write with the device unplugged from the GPIB bus:

ibtest
Do you wish to open a (d)evice or an interface (b)oard?
(you probably want to open a device): d
enter primary gpib address for device you wish to open [0-30]: 12
trying to open pad = 12 on /dev/gpib0 ...

: w
enter a string to send to your device: *IDN?
sending string: *IDN?

gpib status is:
ibsta = 0x8000  < ERR >
iberr= 2
ENOL 2: No listeners

ibcntl = 0


if I try with connecting it to the bus I'll get a TIMO error.

Interestingly enough, when trying to open this device in board mode, using
Keysight-VISA I get a segfault

Has anyone had any experiences with these particular clones?

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