1. Files
  2. wccd2
  3. wccd2_io_util
16550a.zip (22K)

Uploaded Tue Apr 28 2026 10:13 am

Toggle 16550 UART FIFOs on and off
16550s.zip (6K)

Uploaded Tue Apr 28 2026 10:13 am

Toggle the NS16550A FIFO buffer, w/TPas source
16550s13.zip (10K)

Uploaded Tue Apr 28 2026 10:13 am

Toggle the NS16550A FIFO buffer, w/TPas source
16550u.zip (28K)

Uploaded Tue Apr 28 2026 10:13 am

Scan for serial ports on system, enable 16550
1pr2a.zip (2K)

Uploaded Tue Apr 28 2026 10:13 am

Swaps LPT1 and LPT2 printer ports
34instal.zip (4K)

Uploaded Tue Apr 28 2026 10:13 am

Adds DOS support for COMM ports 3 and 4
addport.zip (9K)

Uploaded Tue Apr 28 2026 10:13 am

Adds COM3/COM4 ports to DOS equipment list
async.zip (32K)

Uploaded Tue Apr 28 2026 10:13 am

Asynchronous communications routines
async1.zip (12K)

Uploaded Tue Apr 28 2026 10:13 am

COMM driver [.ASM]
async2.zip (16K)

Uploaded Tue Apr 28 2026 10:13 am

COMM driver [.ASM]
async_ce.zip (21K)

Uploaded Tue Apr 28 2026 10:13 am

COMM port driver
aux2.zip (4K)

Uploaded Tue Apr 28 2026 10:13 am

Makes the AUX driver talk to the COM2 port
auxil15.zip (2K)

Uploaded Tue Apr 28 2026 10:13 am

Device driver redirects AUX output to CON
breakbox.zip (5K)

Uploaded Tue Apr 28 2026 10:13 am

Software-based RS232 breakout box
com3_4.zip (5K)

Uploaded Tue Apr 28 2026 10:13 am

Device driver adds COM3/4 that MS-DOS forgot!
com_pkg1.zip (4K)

Uploaded Tue Apr 28 2026 10:13 am

COMM drivers (source only)
com_pkg2.zip (8K)

Uploaded Tue Apr 28 2026 10:13 am

COMM drivers (source only)
com_pkg3.zip (11K)

Uploaded Tue Apr 28 2026 10:13 am

COMM drivers (source only)
comchk18.zip (30K)

Uploaded Tue Apr 28 2026 10:13 am

Commchk 1.8: Serial port protocol analyzer
comfix12.zip (15K)

Uploaded Tue Apr 28 2026 10:13 am

Windows COM port 'bug' fix/DOS COM port setup
comhelp.zip (60K)

Uploaded Tue Apr 28 2026 10:13 am

Comprehensive comm/tutor and UART tester
comhex42.zip (31K)

Uploaded Tue Apr 28 2026 10:13 am

Serial communications display program
comm.c (5K)

Uploaded Tue Apr 28 2026 10:13 am

 comm.doc (2K)

Uploaded Tue Apr 28 2026 10:13 am

 comprt25.zip (29K)

Uploaded Tue Apr 28 2026 10:13 am

Config COM/LPT ports: Show address, IRQ & UART
comsnd14.zip (25K)

Uploaded Tue Apr 28 2026 10:13 am

Send arbitrary characters to COM port from DOS
comst12.zip (23K)

Uploaded Tue Apr 28 2026 10:13 am

Comset v1.2: Modem/UART/serial port tester
comtrap.zip (3K)

Uploaded Tue Apr 28 2026 10:13 am

TSR to trap unexpected COM port interrupts
ctsspu21.zip (148K)

Uploaded Tue Apr 28 2026 10:13 am

COM port & modem setup & diagnostic utilities
czcm11b.zip (11K)

Uploaded Tue Apr 28 2026 10:13 am

Driver allows various mixes of COM ports 1-4
db9_db25.zip (1K)

Uploaded Tue Apr 28 2026 10:13 am

Wiring info: DB9 to DB25 serial connector
dcom20.zip (38K)

Uploaded Tue Apr 28 2026 10:13 am

Captures COM port input. Requires two ports
dlm140.zip (25K)

Uploaded Tue Apr 28 2026 10:13 am

Data Line Monitor: Turn PC into a datascope
fifo11.zip (9K)

Uploaded Tue Apr 28 2026 10:13 am

Report type of UART (8250, 16550, etc.)
fx16550d.zip (4K)

Uploaded Tue Apr 28 2026 10:13 am

Corrects problem with AMI BIOS and 16550 UART
ibmaux20.zip (3K)

Uploaded Tue Apr 28 2026 10:13 am

Dual I/O driver for the AUX: device
iomon2.zip (35K)

Uploaded Tue Apr 28 2026 10:13 am

IO Monitor 386 control watches COM ports
ioview.zip (6K)

Uploaded Tue Apr 28 2026 10:13 am

Diagnostic - view of PC's I/O ports in action
ip122.zip (10K)

Uploaded Tue Apr 28 2026 10:13 am

Serial interrupt and port verification program
kbfake10.zip (9K)

Uploaded Tue Apr 28 2026 10:13 am

Redirects serial input as if from keybd, w/src
komm.asm (28K)

Uploaded Tue Apr 28 2026 10:13 am

 komm.inf (1K)

Uploaded Tue Apr 28 2026 10:13 am

 message.zip (52K)

Uploaded Tue Apr 28 2026 10:13 am

Send msgs thru COM port between PCs, TSR w/src
new14h.zip (6K)

Uploaded Tue Apr 28 2026 10:13 am

DOS-extension add functions to comm routines
ns16550.zip (3K)

Uploaded Tue Apr 28 2026 10:13 am

Checks to see if NS16550AN serial chip is used
ns_16550.zip (39K)

Uploaded Tue Apr 28 2026 10:13 am

Test 16450/16550/16550a serial chips w/source
ox.zip (4K)

Uploaded Tue Apr 28 2026 10:13 am

Redirect DOS AUX I/O to keyboard/mono display
para13.zip (72K)

Uploaded Tue Apr 28 2026 10:13 am

Parallel port information & diagnostic util.
pc_to_pc.zip (1K)

Uploaded Tue Apr 28 2026 10:13 am

Assist on PC-PC direct connection
pf271.zip (39K)

Uploaded Tue Apr 28 2026 10:13 am

Port Finder: Display info/swap LPT & COM ports
pipeln10.zip (19K)

Uploaded Tue Apr 28 2026 10:13 am

TSR connects COM1 and COM2 serial ports
port11.zip (28K)

Uploaded Tue Apr 28 2026 10:13 am

I/O port debugging tool, with C source code
portfind.zip (6K)

Uploaded Tue Apr 28 2026 10:13 am

Locate & install serial & par. ports, COM3&4
ports13.zip (19K)

Uploaded Tue Apr 28 2026 10:13 am

Permits reading and writing to hardware ports
portst11.zip (44K)

Uploaded Tue Apr 28 2026 10:13 am

Diagnostic program for serial/parallel ports
prindir9.zip (29K)

Uploaded Tue Apr 28 2026 10:13 am

COM/LPT port redir. to any other port or file
prlink20.zip (26K)

Uploaded Tue Apr 28 2026 10:13 am

File transfer prog. via printer/parallel port
rs204.zip (16K)

Uploaded Tue Apr 28 2026 10:13 am

Displays RS-232 serial port status
rs232.zip (3K)

Uploaded Tue Apr 28 2026 10:13 am

Source for COMM drivers (.ASM)
rs232101.zip (44K)

Uploaded Tue Apr 28 2026 10:13 am

RS232 1.01, debug most of RS-232 problems
rs232of2.zip (2K)

Uploaded Tue Apr 28 2026 10:13 am

Fix port conflicts, turns off all 4 COM ports
rts12.zip (9K)

Uploaded Tue Apr 28 2026 10:13 am

Toggle RTS for COM1 to COM4 ports
sansint2.zip (33K)

Uploaded Tue Apr 28 2026 10:13 am

Port utility - poll ports rather than use IRQs
serial.aqm (3K)

Uploaded Tue Apr 28 2026 10:13 am

 serial.doc (2K)

Uploaded Tue Apr 28 2026 10:13 am

 serint.aqm (3K)

Uploaded Tue Apr 28 2026 10:13 am

 slikmode.zip (9K)

Uploaded Tue Apr 28 2026 10:13 am

New MODE: Set baudrate to any rate w/C src
superv22.zip (46K)

Uploaded Tue Apr 28 2026 10:13 am

Enhanced BIOS interrupt 14 comm support
swapcom.zip (1K)

Uploaded Tue Apr 28 2026 10:13 am

Swap COM1 with COM2
swapport.zip (2K)

Uploaded Tue Apr 28 2026 10:13 am

Swap LPT1 with LPT2
tandy232.asm (9K)

Uploaded Tue Apr 28 2026 10:13 am

 timio3_0.zip (71K)

Uploaded Tue Apr 28 2026 10:13 am

Timed record and playback COM port data
toadmod1.zip (4K)

Uploaded Tue Apr 28 2026 10:13 am

Set COM 1-4 to 19200/38400/57600/115200 bps
tsrcomm.zip (16K)

Uploaded Tue Apr 28 2026 10:13 am

TSR serial device driver
uartbug.zip (10K)

Uploaded Tue Apr 28 2026 10:13 am

UART and COM port debuging tool, TSR
uartty12.zip (10K)

Uploaded Tue Apr 28 2026 10:13 am

Displays type of UART chip for all comm ports
whtprt40.zip (13K)

Uploaded Tue Apr 28 2026 10:13 am

Displays system serial ports & IRQ assignments
wildcat.txt (4K)

Uploaded Tue Apr 28 2026 10:13 am

 xport21.zip (29K)

Uploaded Tue Apr 28 2026 10:13 am

Fast PC-to-PC RS232 serial line file transfer
z404mpsc.zip (6K)

Uploaded Tue Apr 28 2026 10:13 am

Zenith COM3 port driver fix for gov't Z-248