test-drb August 2003

test-drb@ccmp.vtda.org

280 participants
469 discussions

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List moderation slowdown

by TRASH3＠splab.cas.neu.edu

family comes first...

21 years, 5 months

List moderation slowdown

by RCini＠congressfinancial.com

Please accept my concolences to you and your family. ========================== Richard A. Cini, Jr. First Vice President Congress Financial Corporation 1133 Avenue of the Americas 30th Floor New York, NY 10036 (212) 545-4402 (212) 840-6259 (facsimile) -----Original Message----- From: Jay West [mailto:jwest@classiccmp.org] Sent: Thursday, August 21, 2003 9:39 AM To: cctech(a)classiccmp.org Cc: cctalk(a)classiccmp.org Subject: List moderation slowdown All posts requiring moderation (some to cctalk and all to cctech) may be delayed a few days, or slower than usual at least, due to a death in the family. I will try to pop in from time to time to take care of things, but my availability will be sparse the next few days. I apologize for any delayed posts in advance. Jay West

21 years, 5 months

AltairBASIC on a Z80

by RCini＠congressfinancial.com

Hello, all: Here's an interesting question for the group. Someone who works with me on the Altair32 Emulator is attempting to get AltairBASIC 4.0 running on a Z80 plug-in. It doesn't run. While scanning some past issues of BYTE, I came across the following letter from May, 1980: "I wonder if any BYTE readers could assist me in locating the patch to Altair 8k 4.0 Version and Altair Extended 4.0 Version BASICs which will allow these BASICs to run on a Z80." "I recently purchased a TDL ZPU which uses the Z80. The manual notes this incompatibility stating that Altair BASIC 'has as part of its routines several occasions where the parity flag is checked as part of the function. In the Z80 the parity flag indicates OVERFLOW during math routines, not parity.' The manual states that it contains a patch in Appendix C, but no Appendix C is included." Does anyone either have this TDL Appendix C or can tell me how to patch BASIC 4.0 to work on a Z80. Thanks. Rich

21 years, 5 months

commodore 64

by Curtis.Ivy＠usdoj.gov

do you still have the system? If so please respond.

21 years, 5 months

Floppy interface

by finotti.f＠katamail.com

I would like project a circuit to emulate a old 8 inch floppy disk (tandon tm848 e). So i would like to know wath kind of signal the controller send to floppy drive and the reponse of floppy to controller. Thank you.

21 years, 5 months

8086 primer

by raviramanathan＠hotmail.com

Hi If the manual is a soft copy, could you please e-mail it to me? thanks and regards. ravi

21 years, 5 months

Looking for CPU daughter card R4000 for DECstation 5000/150

by jph＠stephenson.net.dhis.org

Hi, I am looking for a CPU daughter card (MIPS R4000) for a DECstation 5000/150 (part # printed on the board : 50-21873-01, is this the official DEC part # ?) to replace a daughter card that was damaged during transport. Thanks in advance for any advice about cheap supply sources. Jean-Pierre HOFER

21 years, 5 months

R-E Articles

by zephyr＠coinet.com

Hi Mike, Would like to know if you have a source for old Radio Electronics archives. Trying to locate a 1973 article on the XR2206. Guvvy

21 years, 5 months

Low Level Format

by Robert_Feldman＠jdedwards.com

If the drive in question is MFM, then Low Level Formatting is appropriate. For some drives, the LLF routine was available on disk, accessable by way of DEBUG.EXE. However, since the drive is only 8 years old, my guess is that it is IDE, and, as such, LLF was generally not a user option. For IDE drives in MS-DOS, you would first run FDISK to create/change the partitions, then run FORMAT to build the new FATs. MS-DOS 6.22 is probably the best version to use, if you have it. You could also get DR-DOS. Avoid MS-DOS 4.0. As has been mentioned, Gene, if you are concerned about making data recovery hard, first run something like Norton's WIPEDISK, then FDISK and FORMAT the drive. Bob -----Original Message----- From: Innfogra(a)aol.com [mailto:Innfogra@aol.com] Sent: Thursday, August 21, 2003 12:25 AM To: cctalk(a)classiccmp.org Subject: Re: Low Level Format <snip> I was lucky and they were MFM drives I could low level format. <snip> Paxton Astoria, OR

21 years, 5 months

Low Level Format

by Innfogra＠aol.com

In a message dated 8/20/03 9:39:49 PM Pacific Daylight Time, mail.list(a)analog-and-digital-solutions.com writes: > . I've found the partitioning utility that came with > OS2 Warp to be useful when FDISK sometimes wouldn't work. > Thanks for the tip. I, too, have run into partitions like you mentioned that would not delete. I was lucky and they were MFM drives I could low level format. IIRC removing and replacing the partition table should effectively destroy the links to the data on the drive. True the data bits are still there and sophisticated analysis could get them off but I don't think it is easy without knowing the original geometry of the drive. Then regular formatting the drive writes a new File Allocation Table to the drive. If it is important you could use Norton to write zeros to all the data bits in each partition and then FDISK it. That would probably make the disk unrecoverable. I know there are utilities out there to low level format IDE drives but have never found it or used it. I don't think it is common. Generally I have just pitched bad IDE Drives into Al breakage. For Certified destruction I have used a sledge hammer. Paxton Astoria, OR

21 years, 5 months

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test-drb August 2003