Dec 082017
 
A must have for anyone who uses Double Dos.
File DDOSTIPS.ZIP from The Programmer’s Corner in
Category Alternate Operating Systems
A must have for anyone who uses Double Dos.
File Name File Size Zip Size Zip Type
DDBUGS.DOC 3712 1212 deflated
DDCONFIG.DOC 10902 4116 deflated
DDCONFIG.SYS 2541 865 deflated
DDETC.DOC 384 218 deflated
DDSWITCH.ASM 2082 858 deflated
DDSWITCH.BAS 3343 1429 deflated
DDSWITCH.OBJ 167 157 deflated
SWITCH.ASM 14757 4978 deflated
SWITCH.EXE 1136 130 deflated
TPCREAD.ME 199 165 deflated

Download File DDOSTIPS.ZIP Here

Contents of the DDBUGS.DOC file


The following are the known patches for DOUBLEDOS version 4.0. You
should always work with a copy of the file and not the original. The
DEBUG program should be available via path or be called explicitly.
The patch dialog would be something like the following:

C:\dirname\>DEBUG DOUBLED2.PGM (may also be called DOUBLEDO.PGM)
- enter changes as specified in patch
-W
writing xxxx bytes
-Q

----------------------------------------------------------------------

Revert to old version 'V' of DoubleDOS
COPY A:\DBLDVPGM.DRV C:\dirname\DOUBLED2.PGM (or DOUBLEDO.PGM)
note: this is not a permanent change. re-installing the program will
restore it to version 4.0

----------------------------------------------------------------------

Hewlett Packard Vectra 1/14/87
-E 85D5 F5 (old value BA)
note: will not work with International Quartz laptop after this patch.

----------------------------------------------------------------------

very slow printing w/clock or interrupt
-E 116 EA 83 (old values 6E B0)
-E 24A9 21 90 ( " " E8 BD)
note: only use with clock or interrupt when very slow printing occurs.

----------------------------------------------------------------------

IBM DOS 3.3 4/24/87
-E 2130 20 (old value 10)
-E 878C C0 A1 ( " " 41 81)
-E 8B7D 03 50 ( " " 6C 4C)
-E 9487 7F FF B7 6E 20 80 C2 ( " " A7 E0 C5 32 0B 33 FF)
note: will not work with any other operating system after this patch.

---------------------------------------------------------------------

Columbia DOS 3.20
-E 8B7D CE (old value 6C)
note: will not work with any other operating system after this patch.

---------------------------------------------------------------------

Drives with volumes larger than 32 megabytes
-E 4E3A 5F B8 (old values 5C F8)

---------------------------------------------------------------------

COMx=BOTTOM
-E 1237 1F (old value 1B)
-E 1256 1F ( " " 1B)
note: caused junk to be written to random locations in memory.

---------------------------------------------------------------------

Sanyo MBC-990 7/2/87
-E 99DB 12 09 (old values 8E B4)
note: problem is due to a hardware bug. this patch removes an I/O
word read instruction that fails on the Sanyo.

---------------------------------------------------------------------

IBM PS/2 model 30 4/28/87
-E 9075 BA 42 21 (old values 47 FE 45)
-E 9829 09 71 ( " " E0 F8)
-E 982E AF 3A 58 A9 (" " 47 87 3D D0)
note: since this machine requires DOS 3.3, the patch for that will
also be needed.

---------------------------------------------------------------------

REMM.SYS and other expanded ram boards 8/4/87
-E 1AA1 83 E3 E0 38 D2 9C A0 56 0D
(old values 23 19 E8C6 3A 81 B8 01 93)
-E 2366 63 81 95 43 10 AF 12 FD
(old values 47 81 FC D0 31 2E 7C 96)
note: the symptom is that DoubleDOS will work correctly without the
expanded driver present, but will fail with it installed.

---------------------------------------------------------------------



 December 8, 2017  Add comments

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