~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/etc/os-release

PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
uname -a

Linux linuxcnc 4.19.0-21-rt-amd64 #1 SMP PREEMPT RT Debian 4.19.249-2 (2022-06-30) x86_64 GNU/Linux

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dmesg

[    9.805271] parport1: PC-style at 0xdcc8 (0xdcd0), irq 16 [PCSPP,TRISTATE,EPP]

BASE_ADDRESS: dcc8
EXTENDED_ADDRESS: dcd0
IRQ: 16
MODES: PCSPP,TRISTATE,EPP

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/proc/sys/dev/parport/parport1/base-addr
56520	56528

/proc/sys/dev/parport/parport1/modes
PCSPP,TRISTATE,EPP

/proc/sys/dev/parport/parport1/irq
16

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lspci -vvnn

04:00.0 Communication controller [0780]: MosChip Semiconductor Technology Ltd. PCI 9815 Multi-I/O Controller [9710:9815] (rev 01)
	Subsystem: LSI Logic / Symbios Logic 2P0S (2 port parallel adaptor) [1000:0020]
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin A routed to IRQ 16
	Region 0: I/O ports at dcc8 [size=8]
	Region 1: I/O ports at dcd0 [size=8]
	Region 2: I/O ports at dcd8 [size=8]
	Region 3: I/O ports at dce0 [size=8]
	Region 4: I/O ports at dce8 [size=8]
	Region 5: I/O ports at dcf0 [size=16]
	Kernel driver in use: parport_pc
	Kernel modules: parport_pc

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/proc/ioports

  d000-dfff : PCI Bus 0000:04
    dcc8-dccf : 0000:04:00.0
      dcc8-dcca : parport1
      dccb-dccf : parport1
    dcd0-dcd7 : 0000:04:00.0
    dcd8-dcdf : 0000:04:00.0
      dcd8-dcda : parport2
      dcdb-dcdf : parport2
    dce0-dce7 : 0000:04:00.0
    dce8-dcef : 0000:04:00.0
    dcf0-dcff : 0000:04:00.0

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
showport

Base @ 0xdcc8
DPR : 4 (0b00000100)
DSR : 120 (0b01111000)
DCR : 12 (0b00001100)
EPPA: 0 (0b00000000)
EPPD: 0 (0b00000000)

Extended @ 0xdcd0
CFA : 0 (0b00000000)
CFB : 0 (0b00000000)
ECR : 53 (0b00110101)

Current Mode is: PS/2 Mode (0b001-----)
No mode change
ECR : 53 (0b00110101)