The Personal Communications Library for VBDOS (PCL4VB) supports real mode DOS, COM1 through COM20 to 115200, 4+ ports concurrently, many dumb multiport boards, 16550, 16650, 16750 UARTs, interrupt driven, RTS/CTS flow control, any UART address and IRQ, and all memory models. For RS232, RS422, RS485. Supports Microsoft Visual Basic for DOS (VBDOS). Registration is $95 for email delivery. For manuals mailed, add $20 S&H ($25 overseas).
PCL4VB can be used in the development of real mode applications running under DOS. The shareware version of PCL4VB is fully functional.
Current version is 6.2.
Current version is 2.0.