x1lM0
CENV


CENV provides information about your system. The following are sample screens
which can be paged through using the PgUp and PgDn keys:


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[screen 1]
IBM PC Memory Map with 64kb/Line
D = DOS Related . = Empty
* = This Prog. ? = Unused (RAM)
m = Monochrome c = Color/Graphics
b = BASIC (ROM) s = BIOS (ROM)
r = ROM (sum=0) R = ROM (sum<>0)
Seg: 0 1 2 3 4 5 6 7 8 9 A B C D E F
0000: DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
1000: DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
2000: DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
3000: DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
4000: DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
5000: DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
6000: DDDDDDDDDDD*****************************************************
7000: **********************??????????????????????????????????????????
8000: ................................................................
9000: ................................................................
A000: ................................................................
B000: ................................cccccccccccccccc................
C000: ................................rrrrrrrr........................
D000: ................................................................
E000: ................................................................
F000: ........................bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbssssssss
Seg: 0 1 2 3 4 5 6 7 8 9 A B C D E F

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[screen 2]
IBM PC Configuration DOS 2.1

No. of Diskettes = 2
No. of Hard Disks = 1

No. Printers = 2

No. RS232 Ports = 1

Game IO Installed = 0

Coprocessor Active= 0

Video: Color/Graphic
-Power Up Mode: 80x25 BW Color/Graphic
-Current Mode: 80x25 CO Color/Graphic

Total Memory in KBytes = 512

Lock Key States: NUM

Bios: 1501476 COPR. IBM 10/27/82 PC-

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[screen 3]
PC Diskette Parameter Table Values

Located at segment:offset 0000:0522

Transfer Mode is DMA
Bytes/Sector = 512
Sectors/Track = 9

Step Rate Time in Ms = 4
Head Unload Time in Ms = 480
Head Load Time in Ms = 8
Head Settle Time in Ms = 15

Start Time in secs = .25
Motor Wait in secs = 2.03

Gap Length = 42
Data Length = 255
Format Gap = 80
Format Char = F6

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CENV
page 2

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[screen 4]
IBM PC Interrupts (Segment:Offset)

#00 62CC:1013 Divide by 0 #01 0070:0147 Single Step
#02 F000:E2C3 Nonmaskable #03 62CC:0FD1 Breakpoint
#04 0070:0147 Overflow #05 F000:FF54 Print Screen
#06 F000:FF47 ??? #07 F000:FF47 ???
#08 18C7:08EB Timer #09 18C7:0A7C Keyboard Irpt
#0A F000:E6DD ??? #0B F000:E6DD Comm 2.0
#0C 3E1A:0667 Comm 2.0 #0D C800:07BE Disk 2.0
#0E F000:EF57 Diskette #0F 0070:0147 Printer 2.0
#10 18C7:0FDF Video IO #11 F000:F84D Equipment Check
#12 F000:F841 Memory Size #13 18C7:0A08 Disk(ette) IO
#14 F000:E739 RS232 IO #15 F000:F859 Casette IO
#16 18C7:0AA3 Keyboard IO #17 F000:EFD2 Printer IO
#18 F600:0000 ROM Basic Entry #19 C800:0202 Bootstrap Loader
#1A F000:FE6E Time of Day #1B 0594:00F2 Keyboard Break Ctrl
#1C 18C7:08C4 Timer Irpt Ctrl #1D F000:F0A4 Video Init Parms.
#1E 0000:0522 Diskette Parms. #1F F000:0000 Graphics Base 128-255

#20 0A6B:8087 DOS Program Terminate #21 6205:0180 DOS Function Call
#22 6205:028C DOS Terminate Address #23 6205:0299 DOS Ctrl-Break Exit
#24 6205:04E2 DOS Fatal Error Exit #25 18C7:0DBE DOS Abs Disk Read
#26 18C7:0DD4 DOS Abs Disk Write #27 00EB:2713 DOS Terminate (Fix)

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[screen 5]
Program Segment Prefix at: 62CC

0000: CD 20 00 80 00 9A F0 FF-0D F0 8C 02 05 62 99 02 |. ...........b..|
0010: 05 62 E2 04 05 62 05 62-01 01 01 00 02 FF FF FF |.b...b.b........|
0020: FF FF FF FF FF FF FF FF-FF FF FF FF C3 62 6C F5 |.............bl.|
0030: BD 65 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |.e..............|
0040: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
0050: CD 21 CB 00 00 00 00 00-00 00 00 00 00 20 20 20 |.!........... |
0060: 20 20 20 20 20 20 20 20-00 00 00 00 00 20 20 20 | ..... |
0070: 20 20 20 20 20 20 20 20-00 00 00 00 00 00 00 00 | ........|
0080: 00 0D 00 0D 69 6C 2E 64-6F 63 0D 63 00 0D 0D 00 |....il.doc.c....|
0090: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
00A0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
00B0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
00C0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
00D0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
00E0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
00F0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|

F00D:FFF0 at #06 CALL Dispatcher
6205:028C at #0A Terminate
6205:0299 at #0E Ctrl-Break
6205:04E2 at #12 Critical Error
Memory. Total No Seg=8000

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