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- Date: Monday, 5 August 1985 10:40-MDT
- From: Walt Sakai <lll-crg!dual!qantel!proper!walt_sak at Seismo.ARPA>
- Re: >> RAMDISK : SUMMARY OF RESPONSES <<
-
- Thanks to all who responded to my RAMDISK query. Below is an
- edited summary (about 4 pages long) for your information. Send
- additional responses if you like.
-
- Walt Sakai
- {ucbvax,hplabs,ihnp4,cbosgd,
- decwrl,unisoft,fortune,sun,nsc}!dual!proper!walt_sak
-
- * * *
-
- From nsc!seismo!purdue.edu!droms Wed Jul 31 08:44:38 1985
- =================================================================
- Micro-Cornucopia magazine recently reviewed a number of Z80 SBC
- memory expansion boards.
-
- Micro-C no. 22 (February-March, 1985) includes reviews of a 256K
- RAM Expansion Module from Ferguson Engineering, and the Rivendell
- Audiocomp 256K Ram + I/O expansion board.
-
- Issue no. 23 (April-May, 1985) has a short review of the
- MicroSphere 256K RAMdisk.
-
- Issue no. 9 (Dec. 1982) reviews the LASoftware 256K RAMDisk kit.
-
- Ralph Droms ihnp4!purdue!droms
- 445 MATH droms@purdue.arpa
- Dept. of Computer Science droms@purdue.csnet
- Purdue University, West Lafayette, IN 47907
-
-
- From: dual!ukma!steve (Steve Ferry)
- =================================================================
- I have a Drive C that I use with my Osborne I and I think its
- wonderful. To be really useful, it needs to be fairly large. Mine
- is 384K and 512K wouldn't hurt a bit. There is some problem using
- it with submit and with programs that sit up in high memory
- intercepting BDOS calls. I wouldn't use Wordstar without it.
-
-
- From dual!cbosgd!ihnp4!tektronix!tekchips!toma (Tom Almy)
- =================================================================
- I have had about a years experience with a RAM-DISK that I built
- for my Lobo MAX-80. My system has a 5 Mhz Z-80, two DSDD 8"
- drives (1.2 meg apiece), and a 256k ram-disk. Operating system is
- CP/M+ with about 32k of sector-buffering. The buffering of
- CP/M+ improves performance of random-access files (such as
- databases) to the point that ram-disk offers little improvement.
- I put the utility .COM files and the overlays for Wordstar and
- KAMAS on the RAM disk. I also don't trust the RAM-DISK for data
- files (except read-only, where information is always backed up on
- a Floppy).
-
- If I could do it again, I would want to rely on track or sector
- buffering instead of a RAM DISK (since it automatically backs up
- to the floppy), perhaps with a few hundred K of RAM for this.
- Then I would want to have a ROM DISK (a RAM disk with 27256
- EPROMS) to hold all my commonly used programs and overlays. In
- fact, the CP/M OS could be loaded of of the ROM DISK eliminating
- the need for a "System Disk".
-
-
- From nsc!seismo!MIT-MC.ARPA!STORK (Eric Stork)
- =================================================================
- I've used a SEMIDISK for 1.5 years now, and would not be without
- it. Cost has come down a lot (see BYTE ad). Speed is amazing. For
- example, to load dBASEII off a floppy takes about 9 secs. To
- load off RAMDISK takes <1 sec.! Assembling long files is a
- pleasure. I keep about 300k of com files in a library, use the
- rest of the 1 meg for data. Highly recommend RAMSDISK.
-
-
- From dual!hplabs!tektronix!reed!elaine
- =================================================================
- I am using the boards from SemiDisk systems and have had no
- trouble with them. They make anything disk intensive very fast. I
- run a BBS of of mine and I know that is disk *intensive*.
-
-
- From dual!ucbvax!sdcsvax!crash!ihom (Irwin Hom)
- =================================================================
- My CP/M system consists of an Apple //e using a PCPI APPLI-Card
- with a 128k piggy-back RAM board. A RAMdisk is definitely an
- advantage when running programs that use overlays. Take WordStar
- for example. Making the transition from floppies to a hard disk
- speeded up the menu displays by about 70%. On the RAMdisk, this
- increased to 95%. Almost instantaneous! The cost for a
- 128k module is about $175. Two modules can be added to the PCPI
- card allowing a 192k workspace. A RAMdisk is worthy when working
- with programs that does a lot of disk access with files or
- overlays. Recently, I've been developing programs in Turbo
- Pascal. Saving and compiling files on the RAMdisk is a tremendous
- timesaver.
-
-
- From qantel!ihnp4!houxm!whuxl!whuts!amc Thu Aug 1 03:52:26 1985
- =================================================================
- I have a Compupro S100 system with a 1/2 Meg MDrive (RAMdisk),
- running OASIS, which is a business-oriented operating system
- modeled after PDP-11/VMS. I also have two 8" floppies attached. I
- keep all the OS stuff on the MDrive (OASIS uses about 1/2 Meg
- with all the goodies like assembler, editor, text formatter,
- terminal emulator, etc.). With the MDrive attached, my computer
- is simply the fastest thing I have ever used, and I have used
- them all--IBM, DEC, HP, Honeywell, Univac, AT&T, and lots of
- micros. Best money I ever spent. -Andy Cohill
-
-
-
- =================================================================
- RAMDISK INFORMATION Source: BAKUP Kaypro User Group, CA
- This file consists of public messages left on the BBS from
- 3/14 to 7/20/85 in regards to mostly the MICROSPHERE RAMDISK.
- =================================================================
-
- From: TOM CIARAMITARO To: ALL Date: 03/14/85
- AS YOU KNOW, I WANT TO SEE ABOUT GETTING A FEW OF US
- TOGETHER FOR THE PURCHASE OF A 1 MB RAMDISK, BY PURCHASING THE
- MICROSPHERE BOARD AND GETTING A QUANTITY PRICE ON THE 256K CHIPS.
- 6 MONTHS AGO THESE CHIPS WERE ADVERTISED FOR OVER $50 IN MICRO C.
- I JUST GOT A FLYER THAT LISTS THEM FOR $8.75 (50 LOT), $8.25 (100
- LOT). THAT WOULD BRING OUR TOTAL PRICE DOWN AS LOW AS $475!!!
- CALL ME (415) 825-0299, OR 687-0644 EVENINGS. THIS ALSO HAS A 64K
- PRINTER BUFFER INCLUDED FREE!
-
- From: KEN FOWLER To: ALL Date: 06/12/85
- Subject: RAMDISK AND KEYPAD
- For all Microsphere Ram Disk users whose numeric keypads no
- longer work, the problem is not with the ramdisk software but
- with the cp/m BIOS. To provide room in memory for the ramdisk
- driver, you had to relocate cp/m using the MOVCPM utility. MOVCPM
- contains a copy of your BIOS as set up by KAYPRO, which includes
- the keypad definitions. It would be O.K. if you could use
- CONFIG.COM to reconfigure the keypad, but unfortunately they
- wrote CONFIG to work only with a 64k system. It should be
- relatively easy for a PASCAL programmer to write a new CONFIG
- which would work on any size cp/m.
-
- From: DANIEL HOWARD To: ALL Date: 06/11/85
- Subject: RAM DISK ODDITY
- WHEN USING THE MICROSPHERE RAM DISK, DIRECT ACCESS TO THE
- PRINTER IS NO LONGER AVAILABLE. I TRIED USING CONTROL-P TO PRINT
- A SMALL DOCUMENT, AND LATER TRIED USING SELECT WORD PROCESSING TO
- PRINT A LETTER BUT NO PRINTING WAS STARTED. WHEN I INITIALIZED
- DISK "E" (THOUGH ONLY USED THE FLOPPIES AFTER INITIALIZING) THE
- PRINTER FUNCTIONED, SO IT SEEMS THAT THE BUFFER DOESN'T FUNCTION
- INDEPENDENTLY OF THE RAM DISK. THIS WILL RARELY BE A PROBLEM
- SINCE I EXPECT TO LOAD SELECT INTO THE RAM DISK MOST OF THE TIME,
- BUT WHEN QUICKLY BATTING OUT A SMALL LETTER AND USING THE
- FLOPPIES ONLY, THE RAM DISK MUST STILL HAVE BEEN INITIALIZED.
-
- From: STEVE WILLETT To: ALL Date: 06/12/85
- Subject: D HAWKINS - RAM DISK
- I did not understand your message about RAM disk initialization.
- Specifically I was puzzled by your comment that EX.COM wouldn't
- work to initialize the RAM disk. I use EX.COM and the following
- NEWRAM.SUB file:
- RDISKM64| {to initialize the disk}
- YY {to ask for and confirm reformatting}
- PIP E:=A:*.*| {to copy files from A:}
- DIR F:| {to switch to RAM disk => A:}
- ERA ???RAM.SUB| {to erase SUB files}
- D|
- This all works fine. I have another file, OLDRAM.SUB, which does
- the same except it does not format the disk. I use this when I
- have left my external power supply on and have data on the disk.
- For this reason I do not give either commands automatically on
- boot -I just issue the EX OLDRAM or EX NEWRAM command from the A>
- prompt.
-
-
- From: DANIEL HOWARD To: ALL Date: 07/08/85
- Subject: RAMDISK & WARM BOOT
- If owners of Microsphere's Ramdisk use DIR F: to make the Ramdisk
- drive A, then warm boots will not activate the floppies, nor will
- a new floppy be logged on. For example, Software Toolworks C/80
- does a warm boot after a compile. If C/80 is in the Ramdisk and
- the latter is set to be drive A, then the warm boot takes place
- using the Ramdisk and there is no drive activity. But to log in a
- new floppy, it would be necessary to use DIR F: to return the top
- drive to being drive A, do a control C, access the new floppy
- (most likely in drive B), and then use DIR F: again to restore
- the Ramdisk as drive A.
-
-
- From: STEVE WILLETT To: ALL Date: 07/11/85
- Subject: RAMDISK & WARM BOOT
- In response to Daniel Howard's message about Microsphere's RAM
- disk and warm boots I'm sorry, I have to disagree. I use DIR F:
- to set up the RAM disk as drive A: and it still spins the
- floppies and accesses the top drive every time I do a warm boot.
- It may be a side effect of having a Pro8 machine and/or having
- ZCPR installed, but it definitely does it.
-
-
- From: STUART HOLLANDER To: ALL Date: 07/12/85
- Subject: RAMBOARD-NEW CHIPS!!
- For those of you who have purchased the Microsphere ramdisk, some
- stimulating news. Just called Fry's in Sunnyvale (408-733-1770)
- and found that (hold onto your seats) they are offering the NEC
- 41256-15 (exactly like the ones on our ramdisks) for $2.99 each.
- Get 'em while they're hot! More good news. Spoke to Don Thompson
- at Microsphere re the upgrade. Contra to the instruction manual,
- we don't need to upgrade our 8748 chips--the ones installed were
- the upgraded versions. Let's see, that is 16 x 2.99, or a 512K
- upgrade for the princely sum of $47.84 plus tax. Bought mine on
- Saturday, plugged 'em in, did the tests, and all is fine. Since
- mine was configured as 512k with a 32k printer buffer, I now have
- 960k available with a 32k printer buffer. Spoke to the people
- at Fry's and, as of Monday the 15th, they will start accepting
- mail orders. Additional charge is something like a dollar, plus
- the C.O.D. charge of $1.95 or so.
-
-
- From: DANIEL HOWARD To: ALL Date: 07/20/85
- Subject: RAMDISK TO 1 MEG
- STUART HOLLANDER LEFT A MESSAGE RE UPGRADING THE MICROSPHERE
- RAMDISK FROM 512K TO 1 MEG USING THE 8748 CURRENTLY INSTALLED
- (THE INSTRUCTIONS STATE THE NEED TO PURCHASE A NEW ONE). WHAT
- STUART DIDN'T MENTION WAS THAT THE JUMPER THE INSTRUCTIONS STATE
- NEEDS TO BE INSTALLED ON U15 IS NOT REQUIRED EITHER. SIMPLY PUT
- IN THE 16 256K CHIPS AND ONE MEGABYTE MINUS THE CURRENT BUFFER IS
- AVAILABLE.
-
- -- EOF --