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Text File | 1980-01-09 | 12.9 KB | 279 lines

JAMBO - Memory Booster Option, Version 1.0 JAMBO is a Device Driver which is designed to make more memory available for you using DOS 5.0 with its EMM386.EXE memory manager. JAMBO is a provided as a fully working Shareware product by Adlersparre & Associates Inc. manufacturers of the Dynamic Memory Control package which can load and remove device drivers and TSR programs from conventional and Upper memory memory without rebooting. If you register JAMBO (registration fee is $10.00), you will receive a coupon to purchase Dynamic Memory Control at 50% off (a $40.00 savings), as well as the latest version of JAMBO when it is available. JAMBO gives you several different options to get more memory in the Upper Memory Blocks (UMB) area (the area past the 640k boundary). You can increase the Upper Memory available by as much as 92k, and have this 92k adjacent to your current UMB, making it 92k bigger. Quick Memory Summary -------------------- Most systems have free memory in the area past 640k. A normal memory layout would be something like this: Conventional Memory: +------------------+------------------+ | | Programs | 0000-9FFF | | | +------------------+------------------+ Upper Memory: +------------------+------------------+ EGA/VGA | A000-AFFF | +------------------+------------------| Mono Buffer | B000-B7FF | B800-BFFF | Color Buffer +------------------+------------------| Video Code | C000-C7FF | C800-CFFF | Unused +------------------+------------------+ Unused | D000-DFFF | +------------------+------------------+ Unused | E000-EFFF | +------------------+------------------+ BIOS | F000-FFFF | +------------------+------------------ Usually, under DOS 5, EMM386.EXE creates the Expanded Memory page frame at D000-DFFF, but you can use the FRAME=E000 option to force the Expanded Memory page frame at E000 instead. Looking at the above diagram, if you could free up the area called BIOS, you could add an extra 64K of upper memory, and if you could move the video code page at C000-C7FF somewhere else, you could get another 32k, making a total of 96k. JAMBO can let you do this, by using the HMA, which DOS normally uses. There is a tradeoff, of course. You will use about 40k more of conventional memory, since you cannot use DOS=HIGH in CONFIG.SYS (only with the /BH or /VH options of JAMBO). But, you get up to 92K more of upper memory by sacrificing 40k of conventional. And your upper memory is one big area, for loading network drivers, CD-ROM, and any other programs. You can get as much as 220k of upper memory. The way JAMBO works is simple. You include JAMBO.EXE as a driver in your CONFIG.SYS file at boot-up time after DEVICE=HIMEM.SYS and before DEVICE=EMM386.EXE, and specify either one or two parameters. The parameters can cause JAMBO to swap the video code page at C000 (hex) to somewhere else, and the BIOS code page at F000 (hex) to somewhere else. The "somewhere else" is defined by one of the following: DEVICE=JAMBO.EXE /VH swaps the video code page to the HMA. This option only works if you are not using DOS=HIGH to load DOS buffers into the HMA. Using the /VH option puts the video code page in faster memory. This option cannot be used with the /BH option. DEVICE=JAMBO.EXE /VA swaps the video code page into Expanded Memory. If you use this option, optimization is done for the video code page, to make the video display faster. No conventional memory is used if you select this option. DEVICE=JAMBO.EXE /VN swaps the video code page into Expanded Memory, but no optimization is done. This makes for slower screen displays, but may be better for some programs which use graphics. Use this choice only if /VA does not work for you. DEVICE=JAMBO.EXE /VM swaps the video code page into the monochrome buffer at B000 (hex). This option can only be used if you do not use any software which tries to use the monchrome buffer. Most systems which have a color display can take advantage of this option. With all of the above options, you can then include the video code page at C000 (hex) when you use EMM386.EXE, to make it into Upper Memory, available for loading TSR's and device drivers. You use the "I=" parameter to do this, such as "I=C000-C7FF". DEVICE=JAMBO.EXE /BH swaps the BIOS code page at F000 into the HMA, giving you another 60k to use with EMM386.EXE. The "/BH" option lets you load the BIOS code from F000 into the HMA (High Memory Area). This will let you allocate the area from F000-FEFF (not F000-FFFF) for use by TSR's and device drivers. When specifying the parameter to EMM386.EXE, use: DEVICE=EMM386.EXE RAM I=F000-FEFF The last 4k must be left alone (that is from FF00 to FFFF). Remember that the JAMBO.EXE device driver MUST always be in CONFIG.SYS BEFORE "DEVICE=EMM386.EXE", and AFTER "DEVICE=HIMEM.SYS". The following examples show you how to set up JAMBO in different configurations. Example 1 - swapping the video page to Expanded Memory ------------------------------------------------------ Suppose you are using EMM386.EXE (the memory manager which comes with DOS 5.0). To swap the video page to Expanded memory, and give yourself an extra 32k, use the following commands in CONFIG.SYS: DEVICE=HIMEM.SYS DEVICE=JAMBO.EXE /VA DEVICE=EMM386.SYS RAM FRAME=E000 I=C000-C7FF DOS=HIGH,UMB Note the I=C000-C7FF option on the EMM386.SYS line. This tells the memory manager to include what was the video code page at C000, and make it usable Upper Memory. JAMBO has moved the video code page into Expanded Memory. The 32k extra will be added to the front of the UMB area which the memory manager used to pick up for you. We specified FRAME=E000 here because the memory manager usually likes to place the Expanded Memory frame at D000, and E000 is more advantageous, since you can get more memory in a single UMB that way. Example 2 - swapping the video page to the High Memory Area ----------------------------------------------------------- The High Memory Area (HMA) is where DOS locates much of itself if you use the DOS=HIGH option in CONFIG.SYS. That usually saves 40k to 50k of conventional memory. But if you would rather have 32k more in Upper Memory, for loading networks, or other big TSR's or device drivers which won't otherwise fit, JAMBO gives you the option of relocating the video code page to the HMA. You would do it like this: DEVICE=HIMEM.SYS DEVICE=JAMBO.EXE /VH DEVICE=EMM386.EXE RAM FRAME=E000 I=C000-C7FF DOS=UMB In this case, we don't use DOS=HIGH,UMB, just DOS=UMB, so that DOS will not load itself into the HMA. But we do tell the memory manager to include the video page which we have swapped to the HMA (C000) with JAMBO. Doing this causes DOS to use more conventional memory, but gives you a bigger Upper Memory region. Example 3 - swapping the video page into the Monochrome Buffer -------------------------------------------------------------- Many systems have a color monitor, so there is a 32k unused area at B000 (hex) which JAMBO can use for the video page. If you have a color monitor, and you don't run programs that use the monochrome area, you can pick it up as an area for the video code page. Why is that an advantage? Because swapping the video code page with the monochrome buffer gets you a bigger (32k bigger!) UMB instead of having a separate 32k area, and another area. That means you can load TSR's and device drivers in one big UMB area instead of having to juggle programs to see which will fit best in each UMB. To use the monochrome buffer, you would use: DEVICE=HIMEM.SYS DEVICE=JAMBO.SYS /VM DEVICE=EMM386.EXE RAM FRAME=E000 I=C000-C7FF I=B000-B7FF DOS=HIGH,UMB In this example, we include the video code page with the I=C000-C7FF option, and also include the monochrome buffer with I=B000-B7FF, for JAMBO to use. Example 4 - swapping BIOS into the HMA -------------------------------------- You can swap the BIOS in page F000 into the HMA, giving you an extra 60k of upper memory (not 64k, because the last 4k at FF00-FFFF must be left alone). With this option, you can not use DOS=HIGH in CONFIG.SYS, but you do get a much bigger high memory area. You would use the following parameters: DEVICE=HIMEM.SYS DEVICE=JAMBO.EXE /BH DEVICE=EMM386.EXE RAM I=F000-FEFF FRAME=E000 DOS=UMB This would put the Expanded Memory page frame at E000, splitting up the region. A better way to do this would be: DEVICE=HIMEM.SYS DEVICE=JAMBO.EXE /BH DEVICE=EMM386.EXE RAM I=D800-FEFF FRAME=C800 DOS=UMB Where the Expanded Memory page frame is at C800 instead, and you get a bigger single contiguous region. Example 5 - going for as much as possible ----------------------------------------- If you were to load the video code page into Expanded Memory, and load the BIOS page into the HMA, and include the monochrome buffer as upper memory, you would have a 220k of available Upper Memory in two regions (the color buffer is between them at B800-B8FF). You could use the following: DEVICE=HIMEM.SYS DEVICE=JAMBO.EXE /BH /VA DEVICE=EMM386.EXE RAM I=C000-FEFF I=B000-B7FF FRAME=C000 DOS=UMB Notes about JAMBO ----------------- JAMBO has been tried on many computers successfully, including Packard-Bell, DELL, Toshiba, IBM and several other clones, but in our experience, we can truly say that "no two clones are alike". If you experience a problem with JAMBO, we would like to hear from you so that we can make it a better product. JAMBO is provided as a Shareware utility. Please pass it on to others to try, however no commercial fee may be charged for its use. JAMBO is a copyright software product of Adlersparre & Associates Inc. You are encouraged to register this software product, to take advantage of the special offer to purchase Dynamic Memory Control at half price, and to receive the latest version of JAMBO, when it is available. Dynamic Memory Control can load and unload TSR's and device drivers from conventional and upper memory, and convert device drivers and TSR's into self-removing programs. It also has several memory maps, system displays, a full-screen editor, pull-down mouse supported windows, and will even create batch files to automate your applications. And you can get DMC for only $39.95 (a $40.00 savings) when you register this copy of JAMBO. Call for info on other products from Adlersparre & Associates Inc. Adlersparre & Associates Inc. 501-1803 Douglas Street Victoria, BC, Canada, V8T 5C3 Phone (604) 384-1118 or FAX (604) 384-3363