levericw@cheetah.ece.clarkson.edu (Walden Leverich) (03/29/91)
Does anyone know the memory requirements of DOS 5.0 loaded into high
mem and running 4DOS as the shell (also in high mem)
ie: How much memory can I really get if I move all this stuff to
highmem?
Also how many of the DOS 5.0 improvements are in DOS proper and how
many are in the shell (commmand.com)?
I am on a 286 with 4Meg. (No NEAT or C&T) But I am also interested
from a 386DX 33/64K with 4M standpoint.
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Walden H. Leverich III | Inet: levericw@clutx.clarkson.edu
ECE Dept. | CServ: 73237,2212 <- checked weekly
Clarkson University | SnailMail: Software Solutions
| PO Box 763
| Potsdam, NY 13676-0763
#include <std_disclamer_concerning_what_I_say>
--------------------------------------------------------------------------tporczyk@na.excelan.com (Tony Porczyk) (03/30/91)
The News Manager) Nntp-Posting-Host: na Reply-To: tporczyk@na.excelan.com (Tony Porczyk) Organization: Standard Disclaimer References: <LEVERICW.91Mar29085520@cheetah.ece.clarkson.edu> Date: Sat, 30 Mar 1991 00:20:10 GMT Mr. levericw@cheetah.ece.clarkson.edu (Walden Leverich) writes: > Does anyone know the memory requirements of DOS 5.0 loaded into high > mem and running 4DOS as the shell (also in high mem) Hm... 4DOS loaded high? It swaps itself to exended or expanded memory as needed, if that's what you mean. Here are the memory numbers for a bare boot: Address Name Size Type ------- -------- ------ ------ 000000 000400 Interrupt Vector 000400 000100 ROM Communication Area 000500 000200 DOS Communication Area 000700 IO 000A60 System Data 001160 MSDOS 0013D0 System Data 002530 IO 000F80 System Data HIMEM 0004A0 DEVICE= 0005D0 FILES= 000100 FCBS= 000200 BUFFERS= 0001C0 LASTDRIVE= 0034C0 MSDOS 000040 System Program 003510 4DOS 000B90 Program 0040B0 4DOS 001000 Environment 0050C0 MEM 000110 Environment 0051E0 MEM 0176F0 Program 01C8E0 MSDOS 083710 -- Free -- 655360 bytes total conventional memory 655360 bytes available to MS-DOS 634384 largest executable program size 7602176 bytes total contiguous extended memory 0 bytes available contiguous extended memory 7458816 bytes available XMS memory MS-DOS resident in High Memory Area Now, in reality, you don't run your machine bare, so more realistic stuff would look as follows: Address Name Size Type ------- -------- ------ ------ 000000 000400 Interrupt Vector 000400 000100 ROM Communication Area 000500 000200 DOS Communication Area 000700 IO 000A60 System Data 001160 MSDOS 0013D0 System Data 002530 IO 00C6A0 System Data SETVER 000180 DEVICE= HIMEM 0004A0 DEVICE= SMARTDRV 005930 DEVICE= RAMDRIVE 0004A0 DEVICE= ANSI 001060 DEVICE= MOUSE 004720 DEVICE= 0005D0 FILES= 000100 FCBS= 000200 BUFFERS= 0001C0 LASTDRIVE= 00EBE0 MSDOS 000040 System Program 00EC30 4DOS 000B90 Program 00F7D0 4DOS 001000 Environment 0107E0 MEM 000120 Environment 010910 LSL 005470 Program 015D90 MSDOS 000130 -- Free -- 015ED0 3C503 000E10 Program 016CF0 TCPIP 004E60 Program 01BB60 TELAPI 005460 Program 020FD0 MEM 0176F0 Program 0386D0 MSDOS 067920 -- Free -- 655360 bytes total conventional memory 655360 bytes available to MS-DOS 520224 largest executable program size 7602176 bytes total contiguous extended memory 0 bytes available contiguous extended memory 3264512 bytes available XMS memory MS-DOS resident in High Memory Area No, I do not load drivers high using EMM386 and loadhigh - some of the DOS apps I use under Windows die with such configuration, so I'd rather live with 520K under almost full load (still quite acceptable). You may, of course, use QEMM and fine-tune it with various switches, but it is still too delicate for me, and after seeing its dump on the screen one time too many, I switched back to HIMEM. Besides, with comm card (have to exclude some memory), you can't really load that much of this stuff into high mem anyway. With QEMM you may gain 30K-35K. To me it's not worth the shakiness of the system. Now, if it was 465K to 500K jump, that would be a different story. 520K to 550K is not that crucial (to me). To me, more important is that there is no more 4096K limit on ramdrive. > ie: How much memory can I really get if I move all this stuff to > highmem? See above. > Also how many of the DOS 5.0 improvements are in DOS proper and how > many are in the shell (commmand.com)? LOADHIGH is in COMMAND.COM, most other stuff is in DOS. I would never, repeat, never, give up 4DOS for that. I would much rather use QEMM386. Overall, I love this combination - more memory, single partitions (without buggy DOS 4.0), improved OS, AND all the flexibility of 4DOS. Hard to beat in the single-tasking world. Tony