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CTMAP 0.92 - DOS memory extender for 80386 "AT" computers which use Chips & Technologies 82C302/82C307 DRAM controller chips. Copyright 1989, Burton Systems Software. All rights reserved. Burton Systems Software P.O. Box 4165, Cary, NC 27519 USA (919) 481-0098 ------------------------------ OVERVIEW ----------------------------- The CTMAP package contains two programs: CTMAP and LOADHIGH. CTMAP: If you are using an 80386 computer with the Chips and Technologies 82C302 or 82C307 DRAM controller chip, CTMAP can dramatically increase the amount of usable RAM memory available to DOS - from the usual 640K to as much as 944K, depending upon what adapters you have installed in your computer. Usually, 64-96K of this additional memory will be contiguous with the 640K of memory which DOS normally uses, increasing that area to 704K or 736K. Additionally, CTMAP can enable DOS to use up to 240K of discontiguous RAM, located above the display adapter RAM and below the ROM BIOS. However, some programs can't use discontiguous RAM (and CHKDSK ignores it). LOADHIGH: LOADHIGH is used to make programs (expecially TSRs) load in high memory. By installing your TSRs in high memory (above the display RAM), you can further increase the amount of contiguous low memory available for other application programs. -------------------------------- CTMAP ------------------------------ Usage: CTMAP [options] Options are: /A - automatic mode, add all available RAM to DOS's memory pool /C - like automatic mode, but only adds contiguous RAM /R - display 82C302/82C307 registers +xx - enable specified high RAM segment (segment names are listed below) -xx - disable a previously enabled RAM segment /I - initialize the "+xx" memory segment(s) (to avoid parity errors) /D - add specified "+xx" memory segment(s) to DOS's memory pool /B - bump the BIOS data area RAM size at 40:13 ? - Help! For most users, the easiest way to use CTMAP is with the /A parameter. CTMAP will try to automatically add the maximum possible amount of RAM to DOS's memory pool. Then CTMAP exits. CTMAP is not a "TSR" (resident) program; it simply instructs the 82C302 or 82C307 hardware in your computer to enable the additional RAM, then it tells DOS about the additional RAM and quits. Example (for monochrome systems): CTMAP /A ------------------------------- EGA/VGA ----------------------------- Users with EGA and VGA displays who use their displays in graphic modes will not be able to use the /A option alone. Unfortunately, these display adapters, when switched into their various graphic modes, use a lot of the high address space. The following command will work on most (maybe all) VGA systems, even if they use graphics; however, it will only add 64K of RAM to the DOS memory pool (less, if some other device uses part of the E0000 memory segment): CTMAP /A -A -B0 -B4 -B8 -C -D You may be able to add more than 64K of memory on your computer; try CTMAP with various "-xx" options omitted, and see if it works with the graphics-oriented programs which you use. Note: you must reboot your computer each time you try CTMAP with different "-xx" options; you cannot simply re-run CTMAP 0.92 with the different options (we'll probably add this capability in a later version of CTMAP). ------------------------------- LOADHIGH ---------------------------- Usage: LOADHIGH ON or: LOADHIGH OFF After enabling high RAM with CTMAP, you can use LOADHIGH to force TSRs (resident programs) to load up there, thus making more contiguous low memory available for your other programs. To reserve low memory so that subsequently run programs load in high memory, run "LOADHIGH ON" twice. To un-reserve low memory so that other programs can again be loaded there, run "LOADHIGH OFF" once. ------------------------------- EXAMPLE ----------------------------- REM -- this is a sample AUTOEXEC.BAT file -- rem First, enable high memory with CTMAP: C:\UTIL\CTMAP /A rem Then reserve low memory so TSR programs load in high memory: C:\UTIL\LOADHIGH ON C:\UTIL\LOADHIGH ON rem Then load your favorite TSRs: C:\PTTOOLS\MIRROR C: /TC C:\PCTOOLS\PC-CACHE /IA /IB C:\UTIL\CED rem Then un-reserve low RAM: C:\UTIL\LOADHIGH OFF rem Then set up PATH, environment variables, etc. PATH ..;..\..;c:\;c:\util;c:\slick;c:\dos SET tlibcfg=\util\tlib.cfg SET tlibid=DAVE PROMPT $P$G REM -- end of sample AUTOEXEC.BAT -- ----------------------------- MORE DETAIL --------------------------- If you want complete control over which memory segments CTMAP will use, or if you want to enable some high RAM but not tell DOS, you can use the "+xx", /I and/or /D options, where "xx" is any of the following: "A0" (A0000-A3FFF) "A4" (A4000-A7FFF) "A8" (A8000-ABFFF) "AC" (AC000-AFFFF) "B0" (B0000-B3FFF) "B4" (B4000-B7FFF) "B8" (B8000-BBFFF) "BC" (BC000-BFFFF) "C0" (C0000-C3FFF) "C4" (C4000-C7FFF) "C8" (C8000-CBFFF) "CC" (CC000-CFFFF) "D0" (D0000-D3FFF) "D4" (D4000-D7FFF) "D8" (D8000-DBFFF) "DC" (DC000-DFFFF) "E0" (E0000-E3FFF) "E4" (E4000-E7FFF) "E8" (E8000-EBFFF) "EC" (EC000-EFFFF) "A" (A0000-AFFFF) "C" (C0000-CFFFF) "D" (D0000-DFFFF) "E" (E0000-EFFFF) To enable a 16K RAM area (above 640K), specify its name on the command line, prefixed by "+". To disable a 16K RAM area, prefix it with a "-". (But do not disable any RAM which CTMAP has already added to the DOS memory pool!) You can specify the +xx option as many times as necessary to select multiple memory segments (CTMAP will automatically merge adjacent ones). Thus, "CTMAP +A /I /D" is equivalent to "CTMAP +A0 +A4 +A8 +AC /I /D". (If you don't understand hexadecimal addresses and that sort of thing, don't worry - just use the /A option.) To initialize the newly enabled RAM, specify the /I parameter (but omitting the /I could possibly give you a way to recover data in high memory after re-booting your computer). To add the newly enabled RAM to DOS's memory pool (also called the Memory Control Block list or MCB list), add the /D parameter. If you don't want DOS to know about the additional RAM, do not specify /D, /A, or /C. (Note: the RAM currently in DOS's memory pool ends at F0000). Example: "CTMAP +A +B8 +BC +C +D +E /I /D" adds A0000-AFFFF and B8000-EFFFF to DOS's memory pool; that is, all the available RAM above 640K and below 1M on a bare-bones machine with a monochrome graphics display adapter addressed at B0000-B7FFF and the BIOS at F0000-FFFFF. ------------------------------- CAVEATS ----------------------------- 1) If you find that some I/O device or EMS memory card fails when you use "CTMAP /A", you can use explicit "-xx" options to prevent CTMAP from using particular areas of RAM. We suggest trial and error to determine which memory segments you can and cannot allow CTMAP to use. For display adapters, the most likely culprits are the B and C segments. Example: CTMAP -AC -C /A 2) A few TSRs may not work when loaded in high memory. In particular, TSRs which increase the size of the keyboard type-ahead buffer cannot work when loaded in high memory. 3) We've noticed that some command line editor programs get confused about which retrieval buffer to use if they are loaded in high memory or if they are loaded before CTMAP and LOADHIGH are run. DOSEDIT, NDOSEDIT and RETRIEVE have this problem, so if you use one of them, you should install it at the end of your AUTOEXEC.BAT, after the "LOADHIGH OFF". However, CED and PCED (two other popular command line editors) do not seem to have this problem. 4) So far, we have been unable to make device drivers load in high memory. If you are an expert on the guts of DOS and know how to do this, we'd welcome the help. In the meantime, we suggest that users of CTMAP use a TSR-style RAMDISK or CACHE program instead of DOS's VDISK, or else (if you have more than 1 megabyte of RAM memory), run it with the buffer in extended or expanded memory. 5) We're using undocumented DOS features to manipulate the DOS memory pool, so we cannot guarantee compatibliity with future DOS releases. In fact, we haven't even tested version 0.92 of CTMAP and LOADHIGH with all current DOS releases, (DOS 4.0, in particular). If you have a problem, let us know - perhaps we can solve it. --------------------------------- LANs ------------------------------ Most local area network adapters use some high address space. CTMAP will generally detect the LAN adapter RAM and/or ROM, and not enable general purpose RAM at that address. In other words, CTMAP will probably not interfere with your LAN, but the presence of the LAN adapter will probably reduce the amount of RAM which CTMAP can add to DOS's memory pool. If you can choose the memory address for your LAN card, it is a good idea to try to pick an address adjacent to either the ROM BIOS (at F0000) or the display RAM (the address depends upon your display adapter). This will allow CTMAP to add the high memory to DOS's memory pool as one big chunk of memory instead of two little chunks, so that bigger programs will fit in it, with less wasted RAM. Example: We use Novell Netware on an Arcnet, using Network Innovations' PcARC network adapter. It uses 16K of RAM at an address which is selected by DIP switches on the board. The most common setting, and the one expected by Novell's ANET3.COM program is: D0000 (the default) However, we relocated it to: EC000 (just below the BIOS RAM) (Note: the Network Innovations documentation refers to these addresses as D000H and EC00H.) To use the reconfigured card with our version of Novell Netware, it was necessary to patch ANET3.COM. Our version of Netware uses a 50605 byte version of ANET3.COM, dated 05/16/88. When run with the "I" option it displays: Advanced/SFT NetWare V2.01-2 Workstation Shell for PC DOS V3.x Copyright (c) by Novell, Inc. 1983, 1987 LAN Option: Standard Microsystems ARCNET This version of ANET3.COM is fairly easy to patch (if you are comfortable using DOS debug). Simply use DOS debug to search the file for the eight instances of 00 D0, and change all eight instances to 00 EC. ------------------------------- LICENSE ----------------------------- This software is not free. You may try it out on your computer(s) at no cost, but if you like it and decide to continue using it, or if you add it to your AUTOEXEC.BAT, then you must register it at a cost of $35 per computer. ------------------------------ REGISTRATION ------------------------- Register by sending $35 per computer to: CTMAP 0.92 registration Burton Systems Software P.O.Box 4165, Cary, NC 27519 USA Please include the following: Your full name, your company (if any), your telephone number(s), your mailing address (including country), the number of computers you are registering for use of CTMAP 0.92, the brands and models of your computers & your version of DOS, and your payment of $35 US (or $45 Canadian) per computer. Also, please answer the questions: "Are you a programmer? In what computer languages?" Payment should be by check or money order on a US or Canadian bank, or by Visa, MasterCard or EuroCard charge. If paying by credit card, please be sure to include your credit card number, expiration date, type of card (Visa or MC), and the name on the card; and please sign your letter. Or, with a credit card, you can register by telephone or FAX. Call us at (919) 856-0475 (if you are using a FAX, we will transfer your call to the FAX machine upon request; after hours, you can use a touch-tone telephone to make our Voice Mail system transfer your call). ------------------------------ DISTRIBUTION ------------------------- You are encouraged to give copies of this software to your friends and colleagues for trial on their computers. You are free to "upload" this software to any computer bulletin board system (BBS). You may charge recipients of this software a fee of no more than $6 US plus the cost of the distribution media, provided that purchasers are forewarned that continued use requires registration with Burton, and that registration costs $35. However, under no circumstances may "patched" or otherwise modified copies of this software be distributed without prior written permission from Burton. Manufacturers and distributors of computer equipment should contact Burton to purchase distribution licenses for customized versions of this software. -------------------------- DISCLAIMER OF WARRANTY ------------------- No warranty is expressed or implied. Use this software at your own risk. However, if you encounter problems, or if you have suggestions for improvement, we would like to hear from you. ------------------------------- WHO ARE WE? ------------------------- Burton Systems Software is a commercial software development company located in Raleigh, North Carolina. We specialize in systems software and software development tools for programmers. We are best known for our TLIB (tm) Version Control System for MS-DOS (and soon for OS/2). TLIB is the fastest, most powerful, and easiest to use version control software available for PCs. It elegantly solves many of the headaches attendant to software development. But don't take our word for it - give us a call, and we'll gladly send you more information, including a long list of quotes from enthusiastic magazine reviewers. Or try it out - TLIB comes with a full 90 day warranty (unlike CTMAP!). Our telephone number is (919) 856-0475. --------------------------------- BONUS! -------------------------- When you register CTMAP, you'll receive a coupon worth $30 off the price of a TLIB Version Control System. You may also receive an updated version of CTMAP (at our option), if we have improved it significantly since 6-Jul-89.