Dec 062017
Nice set of Assembly Routines for Buffered Serial Communications, callable from C. Includes full source code. | |||
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File Name | File Size | Zip Size | Zip Type |
ASYNC.ASM | 29671 | 8059 | deflated |
ASYNC.DOC | 19690 | 5334 | deflated |
ASYNC.H | 8255 | 2881 | deflated |
ASYNC_S.LIB | 7168 | 2862 | deflated |
A_LIB.NEW | 1655 | 401 | deflated |
A_LIB.UPD | 2022 | 388 | deflated |
CARRIER.ASM | 1096 | 470 | deflated |
CASMHDR.H | 3821 | 1120 | deflated |
COMM.H | 3611 | 1036 | deflated |
DBUG.INC | 1709 | 437 | deflated |
DTR.ASM | 1246 | 534 | deflated |
LITES1.INC | 218 | 117 | deflated |
LITES2.INC | 1265 | 282 | deflated |
MSR.ASM | 1004 | 462 | deflated |
MSRFLOW.ASM | 2242 | 948 | deflated |
READ.ME | 2499 | 1334 | deflated |
RESET.ASM | 1109 | 500 | deflated |
RTS.ASM | 1271 | 547 | deflated |
RXCNT.ASM | 958 | 443 | deflated |
RXFLUSH.ASM | 1131 | 472 | deflated |
SETBPDS.ASM | 1301 | 574 | deflated |
STAT.ASM | 2235 | 918 | deflated |
STRIP.ASM | 1003 | 452 | deflated |
SUBFX.H | 242 | 205 | deflated |
SUPPORT.ASM | 7450 | 2419 | deflated |
TXBLKSUP.ASM | 1678 | 694 | deflated |
TXFLUSH.ASM | 1390 | 579 | deflated |
TXFREE.ASM | 875 | 400 | deflated |
TXIMD.ASM | 3013 | 1137 | deflated |
XOFFCLR.ASM | 1464 | 662 | deflated |
XONANY.ASM | 1312 | 545 | deflated |
XONOFF.ASM | 1674 | 714 | deflated |
Download File COM_232.ZIP Here
Contents of the READ.ME file
FULLY INTERRUPT DRIVEN ASYNC ROUTINES FOR MICROSOFT C 8-29-87
These functions are a part of a group of serial communication routines I
wrote for a friend of mine, Paul Griffin, who was until recently the sysop
of my local neighborhood BBS, Split Up the Middle in Texarkana, TX.
Hopefully it will be back up in a few weeks and I will keep current updates
to these routines on his system. The phone number is 214 838-6713.
The routines provide both buffered transmit and receive for either COM1 or
COM2 or can also drive both simultaneously. They have been tested at up
to 19,200 baud using a terminal program written by Paul and outperformed
every communications program we compared it with when running CRC Xmodem
transfers. Using the make file described in the DOC you can assemble a
version of the routines for any size memory model. The routines are
compatible with MSC 3.0 and 4.0 and will probably also be linkable with
version 5.0 and Quick C when it is released.
There is one bug in the routines that I know of that I just haven't been able
to locate and that is when using RTS/CTS handshaking occasionally a character
will be dropped. I was holding off on releasing the routines until I found
the bug but have read some literature recently on the 8250 UART and the
8259 Interrupt Controller chips that suggests interrupt driven RTS/CTS
handshaking just doesn't work in the PC configuration. I don't use that
feature anyway but didn't take it out since someone else may be able to solve
the problem. If you have a solution leave me some mail at the above BBS if
its up or one of the other BBS's listed below. I check in at the others only
about every couple of weeks so may be slow to respond.
I have been using the ASYNC routines for the low level serial I/O in a small
comm program for the past 4 or 5 months and believe they are bug free with
the exception of the RTS/CTS handshaking. The included library (ASYNC_S.LIB)
is for small model MSC programs. The DOC file explains how to make libraries
for other size memory models or for $10 and a blank formatted disk I will
send you assembled libraries for all memory models. To use the functions
include the COMM.H header file in your C source code and link your compiled
OBJ file with the ASYNC_S library.
Mike Dumdei Split Up the Middle214 838-6713
6 Holly Lane Computer Aide918 493-2137
Texarkana, TX 75503 PC Exchange404 977-6686
Voice: 214 838-8307
December 6, 2017
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