Hans C. Nieder:MS-DOS 6.2+ 6.22: Das Kompendium; komplette Übersicht aller Funktionen. Markt+Technik Verlag, 1999, ISBN 3-8272-5693-3, Expansionsspeicher bzw. Expanded Memory (EMS), S.607 (eingeschränkte Vorschauin der Google-Buchsuche): „Mit EMS 4.0 können bis zu 32Mbyte Expansionsspeicher installiert werden.“
Ray Duncan:Power Programming: Using Extended Memory, Part1. In: PC Magazine. Band8, Nr.10. Ziff Davis, 30.Mai 1989, ISSN0888-8507, S.377 (englisch, eingeschränkte Vorschauin der Google-Buchsuche [abgerufen am 17.März 2025]): “In their protected mode, 80286 and 80386 CPUs are capable of generating these addresses directly, and protected-mode operating systems such as OS/2 and Unix and Xenix can use all the extended memory you can plug into your machine for storing programs and data. By contrast, DOS and its applications run on the 80286 and 80386 in real mode—a sort of 8088/8086 emulation mode. In real mode, the 80286 and 80386 CPUs can generate only 20-bit addresses. The obvious implication would seem to be that DOS and its client programs cannot make use of extended memory for storage of programs and data. Yet our daily experiences tells us otherwise. We’ve all got RAMdisks, disk caches, print spoolers, TSRs, and other utilities of every description that do exploit extended memory when it is present.”
Mark Minasi:The Complete PC Upgrade and Maintenance Guide. Sybex, 1994, ISBN 978-0-7821-1498-0, ChargeCard 286 limulator, S.89 (englisch, eingeschränkte Vorschauin der Google-Buchsuche): “… limulator. Good examples are 386 to the Max from Qualitas and QEMM386 from Quarterdeck. Many 386 vendors offer such a program free, as Compaq does with its CEMM program.”
Scott Mace:Qualitas Scores With 386 Memory Manager. In: InfoWorld. Band12, Nr.10, 5.März 1990, S.47, 2.Spalte, letzter Absatz (englisch, eingeschränkte Vorschauin der Google-Buchsuche): “The product also has a ‘Limulator’ that lets users convert parts of 386 extended memory into EMS 4.0 memory, which more and more software vendors are exploiting.”
Winn Rosch:(Hands On:) V-EMM: Virtual Disk for EMS Memory. In: PC Magazine. Band5, Nr.16. Ziff Davis, 30.September 1986, ISSN0888-8507, S.54 (englisch, eingeschränkte Vorschauin der Google-Buchsuche [abgerufen am 17.März 2025]): “Extending AT Memory– V-EMM can redirect 80286 protected mode (extended memory) to the Lotus/Intel/Microsoft expanded memory specification so that PC ATs can actually use memory in excess of the 640K bytes of RAM recognized by DOS. While many of EMS programs are available, most notably 1-2-3, there’s little use for extended memory beyond RAMdisks.”
Ray Duncan:Power Programming: Using Extended Memory, Part1. In: PC Magazine. Band8, Nr.10. Ziff Davis, 30.Mai 1989, ISSN0888-8507, S.379 (englisch, eingeschränkte Vorschauin der Google-Buchsuche [abgerufen am 17.März 2025]): “Primitive Management– You may already have spottet the major weakness of the extended memory functions supported by the ROM BIOS. While they let you access any location in extended memory quite freely, they do not make any attempt to arbitrate between two or more programs or drivers that are using extended memory at the same time. For example, if an application program and RAMdisk both attempt to put data in the same area of extended memory, no error will be returned by either program, but the data of one or both may be detroyed. … During 1988—4 years after the introduction of the PC AT—two long-overdue proposals for a more sophisticated, cooperative use of extended memory under DOS were introduced. The first is the eXtended Memory Specification (XMS), which represents a collaborative effort of Microsoft, Intel, AST Research, and Lotus. The second, which applies only to 80386-based systems, is the Virtual Control Program Interface (VCPI), and it is sponsored by Quarterdeck Office Systems and Phar Lap Software.”
Ray Duncan:Power Programming: Using Extended Memory, Part1. In: PC Magazine. Band8, Nr.10. Ziff Davis, 30.Mai 1989, ISSN0888-8507, S.377 (englisch, eingeschränkte Vorschauin der Google-Buchsuche [abgerufen am 17.März 2025]): “In their protected mode, 80286 and 80386 CPUs are capable of generating these addresses directly, and protected-mode operating systems such as OS/2 and Unix and Xenix can use all the extended memory you can plug into your machine for storing programs and data. By contrast, DOS and its applications run on the 80286 and 80386 in real mode—a sort of 8088/8086 emulation mode. In real mode, the 80286 and 80386 CPUs can generate only 20-bit addresses. The obvious implication would seem to be that DOS and its client programs cannot make use of extended memory for storage of programs and data. Yet our daily experiences tells us otherwise. We’ve all got RAMdisks, disk caches, print spoolers, TSRs, and other utilities of every description that do exploit extended memory when it is present.”
Winn Rosch:(Hands On:) V-EMM: Virtual Disk for EMS Memory. In: PC Magazine. Band5, Nr.16. Ziff Davis, 30.September 1986, ISSN0888-8507, S.54 (englisch, eingeschränkte Vorschauin der Google-Buchsuche [abgerufen am 17.März 2025]): “Extending AT Memory– V-EMM can redirect 80286 protected mode (extended memory) to the Lotus/Intel/Microsoft expanded memory specification so that PC ATs can actually use memory in excess of the 640K bytes of RAM recognized by DOS. While many of EMS programs are available, most notably 1-2-3, there’s little use for extended memory beyond RAMdisks.”
Ray Duncan:Power Programming: Using Extended Memory, Part1. In: PC Magazine. Band8, Nr.10. Ziff Davis, 30.Mai 1989, ISSN0888-8507, S.379 (englisch, eingeschränkte Vorschauin der Google-Buchsuche [abgerufen am 17.März 2025]): “Primitive Management– You may already have spottet the major weakness of the extended memory functions supported by the ROM BIOS. While they let you access any location in extended memory quite freely, they do not make any attempt to arbitrate between two or more programs or drivers that are using extended memory at the same time. For example, if an application program and RAMdisk both attempt to put data in the same area of extended memory, no error will be returned by either program, but the data of one or both may be detroyed. … During 1988—4 years after the introduction of the PC AT—two long-overdue proposals for a more sophisticated, cooperative use of extended memory under DOS were introduced. The first is the eXtended Memory Specification (XMS), which represents a collaborative effort of Microsoft, Intel, AST Research, and Lotus. The second, which applies only to 80386-based systems, is the Virtual Control Program Interface (VCPI), and it is sponsored by Quarterdeck Office Systems and Phar Lap Software.”
