Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

ISA-8 (small card) in a frame that carries the card and the drive with is the 1.5" thick 3.5" format. CHS written on it from my system days using it has c=782,h=2,s=27. FYI its slower than sludge as its a stepper drive for the heads. I find odd stuff when I go in the closet where I store things.it was under 4 Compaq 1.05 GB SCSI-2 drives.- Allison

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

On 10/05/2017 03:46 PM, Chuck Guzis via cctalk wrote: > On 10/05/2017 04:22 AM, allison via cctalk wrote: > >> Funny the market knew of the 386 in the fall of '85 but it would be >> three years before I'd see >> one in the field. Disks and CPUs lagged the introductions

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

users were happy to have 10 or 20mb of disk. Funny the market knew of the 386 in the fall of '85 but it would be three years before I'd see one in the field.  Disks and CPUs lagged the introductions by  years due to cost. Allison

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

Seriously, one name was forgotten, WD, that the drive maker but the chip maker. The chipset used for board then drive level was the same or successors and the came from WD. Allison On 10/04/2017 03:03 PM, Tom Gardner via cctalk wrote: > Adam – thanks for the research, can I ass

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

ey are 3.5" but fat. Allison --Chuck

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

On 10/2/17 10:13 AM, Jules Richardson via cctech wrote: On 10/02/2017 08:29 AM, allison via cctech wrote: On 10/2/17 8:22 AM, Jules Richardson via cctech wrote: On 10/02/2017 01:46 AM, Alan Perry via cctech wrote: There was a call to form the CAM (Common Access Method) Committee of X3T9.2

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

drive with SCSI internal). Memries of the first SASI/SCSI was 33 years ago for Me, and VAX SCSI was 1995 as that's when I got the CMD controller. Allison Bill

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

, wanting to distinguish between expensive workstation-class drives and something cheaper which could be associated with the lowly PC? It was price...  ATA-IDE was cheaper and PC industry was working hard to push the price down. SCSI always remained more costly. Allison cheers Jules

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

more rare. I was bleeding edge with a Teltek and ST506 in 1980(summer) and it was over 1K in hardware then never minding integrating it myself with CP/M 2.2. The then current disks were removable packs (10mb and over 5K$) and 4mb and larger 8" disk systems using SA4000 drives like Morrow and other

Re: formatting MFM drives on a IBM PC

p the media up to date and also insure the cache is not stale. With cache it makes doing 512byte blocks a trivial issue. Now we have SSDs... Whole new game same old protocols. Allison

Re: formatting MFM drives on a IBM PC

On 9/28/17 10:21 AM, Geoffrey Oltmans wrote: On Wed, Sep 27, 2017 at 11:16 AM, allison via cctalk <cctalk@classiccmp.org <mailto:cctalk@classiccmp.org>> wrote: IDE disks format usually meant high level only.  SCSI could be either depnding on the specific controll

Re: formatting MFM drives on a IBM PC

supplied for that. Those were the bus installed controller as Xyebc, WD, Adaptec also had host controllers as well as SASI/SCSI interfaced versions to drive MFM drives. The whole of that is 5.25 disks and the later 3.5inch IDE class devices.  Other formats were well, different. Allison

Re: formatting MFM drives on a IBM PC

On 9/27/17 12:04 PM, Liam Proven via cctalk wrote: On 26 September 2017 at 21:33, Phil Blundell via cctalk wrote: Low-level formatting (which, at the time, was just called "formatting") used to be quite a routine operation on ST-506 MFM and RLL hard disks. They usually

Re: Fwd: Chasing Digiac...

Huge temporal disconnect. The smcc manual is from 1966... S100 was first seen as the MITS altair in late 1974. Allison On 09/17/2017 03:03 PM, Ed via cctalk wrote: > well there is this total cool book and picture! > > http://www.smecc.org/digiac.htm > > we woul

Re: pdp-8/e restoration.

On 8/16/17 9:38 AM, Ethan Dicks wrote: On Tue, Aug 8, 2017 at 8:35 AM, allison via cctalk <cctalk@classiccmp.org> wrote: Note: TU58 (variant of DC100 tape) to my knowledge was never used with PDP-8 in any flavor. There is no reason why not other than no driver and it 8bi

Re: pdp-8/e restoration.

Note: TU58 (variant of DC100 tape) to my knowledge was never used with PDP-8 in any flavor. There is no reason why not other than no driver and it 8bit only and the blocking is 512bytes. The 8bit part is solved by storing 2 words (12bit word) to 3 bytes (24bits). It could be quite handy as a

Re: Visual 1050

. Worth collecting. Allison

Re: WTB: RX02 Floppy Disks

the RX01 can be used to init (initialize directory) or reformat (to DD). Least the PDP11 can. Allison

Re: ✉Re: an interesting article

For those of us with robust well protected systems (or disposable machine running in VM) the URL is for a papers (as in assignments) for a price site. The first page is fairly safe but its a malware site. Allison On 7/25/17 11:39 AM, Paul Koning via cctalk wrote: On Jul 25, 2017, at 11:33

Re: What Is This Component?

On 07/23/2017 06:12 PM, Dave Wade via cctalk wrote: > It's a "watch" quartz crystal... > > http://www.explainthatstuff.com/quartzclockwatch.html > > probably used to set the master frequency for the UART/Serial interfaces... NO, not at all. To low a frequency as many of them use 16x clock for

Re: What Is This Component?

it a 32768Hz crystal. Likely used to TOD/TOY clock. Allison

Re: Any info about Plessey floppy drive/controller?

drive will only be used single sided. Allison

Re: Cipher F880 with S100 interface card on local CL

lar conclusion. >> >> It's an ISA card all right, but 16-bit to my eye. I posted the >> information on the VCFed forum. >> >> --Chuck >> >> > Maybe an Overland Data TX-8? > http://www.ebay.com/itm/272743761884 > > Doesn't look like a Computer Logics PCTD16 Its clearly NOT S100. ISA is likely. Allison

Re: Steve Garcia / Micromint SB180

128K of 32K eprom or ram but had no disk IO but tons of 8255 (times 2) IO. I have the BCC180 and the SB180 (first version). Allison

Re: TV Typewriter project nearing completion

built in '75 as my first Altair non TTY terminal. Bet it still works and has the 64 char mod. The only issue was stability of the position adjustments. One shots for timing... still not a fan. Allison

Re: Random musing: VCB02 on VAX-11/750

On 05/27/2017 09:15 PM, Josh Dersch via cctalk wrote: > So I had a random thought in the wee hours this morning and I leave it > to you, the cctalk braintrust, to tell me exactly how stupid this idea > is: > > I have a VAX-11/750, an Able QNiverter (UNIBUS->Qbus adapter), a > 22-bit Qbus

Re: Kryoflux or Catweasle

On 05/25/2017 12:18 AM, Chuck Guzis via cctalk wrote: > On 05/24/2017 12:49 PM, allison via cctalk wrote: > >> I remember when RTL was new and uRTL was a later improvement. > Flatpack and TO-100. I probably still have a few mW RTL packages > around. DIPs came later. Bot

Re: Kryoflux or Catweasle

abstract description of the hardware in VHDL format. And yes, I have a pile of old CMOS/ECL/TTL logic. And Germanium transistors... Remember when CMOS logic was new-- +15V Vdd and 1MHz top speed? --Chuck I remember when RTL was new and uRTL was a later improvement. Allison

Re: Directory of old computer collectors

icture of who, what, and even when. They immediately stopped posting all their daily activities and much of the personal stuff. In my case if you can't figure out where I am from a ham call your beyond hope and unlikely to be a risk. Allison

Re: Directory of old computer collectors

home. > Same here city, state and email address is good. Allison Parent, Framingham, MA Email: kb1...@arrl.net (spam proofing via reflector.)

Re: KDF 8189 processor board foobared (ebay warning)

s nicer and cleaner but in the end one multibus card can hold an entire system now and be big and clunky. Allison

Re: KDF 8189 processor board foobared (ebay warning)

On 05/21/2017 11:51 AM, Rob Doyle via cctalk wrote: > On 5/20/2017 7:01 AM, allison via cctalk wrote: >> Best chip for hacking and useful off a board (Falcon, KXT11, RQDX, >> others) is the T11. Its easily > useful like a 8085 or Z80. > > How 'bout a brand new J11-bas

Re: KDF 8189 processor board foobared (ebay warning)

Would be > interesting to find one with memory, processor and console. > A complete system is usually cheaper than the random boards. I know I have two sitting. Allison > Thanks > jim > > > Th

Re: KDF 8189 processor board foobared (ebay warning)

On 05/21/2017 02:10 AM, Tony Duell via cctalk wrote: > On Sun, May 21, 2017 at 3:08 AM, allison via cctalk > <cctalk@classiccmp.org> wrote: > >> The only boards with T11 I have are RQDX1/2/3. However I have a few >> T11s that were ES parts from > As an aside, there

Re: KDF 8189 processor board foobared (ebay warning)

On 05/20/2017 05:56 PM, jim stephens wrote: > > > On 5/20/2017 7:01 AM, allison via cctalk wrote: >> Argh, CPU chips used on dec board loose value as the complete board >> carries the value. >> >> KDF with the second chip is useful but the logic needed t

Re: KDF 8189 processor board foobared (ebay warning)

board carries the value. KDF with the second chip is useful but the logic needed to may a "CPU" of the raw chips is not trivial. Best chip for hacking and useful off a board (Falcon, KXT11, RQDX, others) is the T11. Its easily useful like a 8085 or Z80. Allison > thanks > Jim >

Re: BBS software for the PDP 11

On 05/19/2017 07:49 AM, Liam Proven via cctalk wrote: > On 19 May 2017 at 13:36, Bill Gunshannon wrote: >> Nope. Take a trip to Amazon and look at just how much power this stuff >> actually consumes. And, if you go back to the days when we started >> running this

Re: BBS software for the PDP 11

On 05/18/2017 03:50 PM, Bill Gunshannon via cctalk wrote: > COSMAC Elf? :-) Why not, or a PdP-8. It really is not a high load operation. It was more about storage. Allison > bill > > From: cctalk [cctalk-boun...@classiccmp.org] on behalf

Re: BBS software for the PDP 11

as the basic system and we didn't exceed 2400 baud till '85or later. Most anything could keep up with IO at under 4800 baud. Allison

Re: BBS software for the PDP 11

On 5/18/17 3:19 PM, geneb via cctalk wrote: On Thu, 18 May 2017, allison via cctalk wrote: On 5/18/17 12:51 PM, Adrian Stoness via cctalk wrote: So a 11/03 aka a lsi11 would be to slow for such things? Such as those Heathkit h11 lsi11 macheans? Witch was a hobyist pdp11 for those

Re: BBS software for the PDP 11

or related series would do that with minimal pain. Older boxen like 11/34 or 11/40 are going to suck down watts and need AC. Allison Unless you are a couple of well known museums and others very few do the real hardware. thanks Jim On May 18, 2017 11:45 AM, "Chuck Guzis via cctalk"

Re: BBS software for the PDP 11

or PDP11/03) The -11 is a bit faster. The H11 was not slower, the ram used didn't inject bus waits. Actually the limiting item back then as disk performance. The later hard disks (rd50 to 54, RD31, RD32, RZxxx) really can help. Allison On May 18, 2017 11:45 AM, "Chuck Guzis via c

Re: BBS software for the PDP 11

.Myself I'd consider RSX or RSTS as a better platform as you can easily control user prives and issue accounts based on privs with libraries for global access to software. The real question is why BBS? What is it trying to fix or enable? Allison

Re: Morrow 8" disk image CP/M uploaded

is easier as the DISK controller carries the boot code. bitsavers has manuals. If one has the sorurce for bios building a bootable disk is not terrible to do by hand. In that case the existing disk may be at least partially useful as CP/M (CCP and BDOS) is universal and only the bios is system specific. Allison

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

on the Orange or Grey wall (manuals). Allison On 05/05/2017 06:26 PM, Jerry Weiss via cctalk wrote: >> On May 5, 2017, at 5:13 PM, Jerry Weiss <j...@ieee.org> wrote: >> >> >>> On May 5, 2017, at 4:58 PM, Terry Stewart via cctalk <cctalk@classiccmp.org >&

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

suggestion would require that somebody who has a > flux-transition device (Catweasel, Kryoflux, Central Point Option > board, etc.) would have to do the sector imaging. > > Well, or, . . . > somebody who has an RX02 setup, such as you or Allison, could image > the sectors, instead of copy

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On 05/05/2017 03:39 PM, Fred Cisin via cctalk wrote: >> > Terry is doing it for fun; we can't expect the others to. > > On Fri, 5 May 2017, Bill Gunshannon via cctalk wrote: >> I would. :-) Or maybe for beer. > > I doubt that Allison will want to u

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

thing else you can think of. > > The rest is left as an exercise for the reader. Not absolutely true! THe boot system is a PDP-11, however the VAX can have a Unibus or QBUS (depending on flavor) where a RX02 controller can plug in.

Re: Extracting files off unknown 8 inch disks. Any thoughts

On 05/04/2017 09:27 PM, Fred Cisin wrote: > Thank you! > > Now, the question will be whether Allison has some free time to check > them out for Terry. > I could... If I had the time and no other competing projects. I'm far from the only one around with a PDP-11 with RX02 o

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

D880) or a catsweasel. I know this as I have the former. Allison > This command may be useful when the drive types stored in CMOS > RAM are incorrect for some reason. It's also helpful when an 8" > drive, or a real DEC RX50 drive, has been attached to th

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

sy.To do RX02 on PC you must have a flux reader, 765 and later clones cannot. How do I know. I have PDP-8, PDP11 (with RX02) and VAX (qbus uVAX, uVAX2000, and 3100 family). I used to and still do exchange between RT-11 and CP/M using RX01 mode and a CP/M utility that knew RT11 format. IF it was RX02 media, I'd rewrite on the PDP11 to RX01 media using FIT or other tools. Allison

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

ence between the two is the bus controller and the logic in the drive subsystem. Both use the same physical disk drive and on first glance look the same. Allison

Re: Oscilloscope Recommendation

tor and its a good performer. Not up to the standards of a R FSH6 but about 1/15th the price. Allison

Re: PDP-8/a cleaning

hat turn or move like switches (open wafer for example) need to have contact treatment and bearing lubrication afterwards. Allison paul

Re: PDP-8/a cleaning

rds before we caught the problem. Ouch! Plastics and elastic materials require more care for compatibility. Water is usually the safest but, none can remain. Allison

Re: PDP-8/a cleaning

Thanks in advance, >> Pontus. >> >> > I would go for distilled water, tap water could have chlorine it it. The amount of chlorine (or its analog) is not a enough to be a factor. If you can drink it and its not pool water. Allison > Ben. >

Re: TU-58 in simh

On 04/21/2017 10:13 PM, Don North via cctalk wrote: > On 4/21/2017 6:55 PM, allison wrote: >> On 04/21/2017 09:34 PM, Don North via cctalk wrote: >>> On 4/21/2017 4:25 PM, Brian L. Stuart via cctalk wrote: >>>> I've seen suggestion that TU-58s are emulated in simh

Re: TU-58 in simh

driver or DDX for RT11XM. Least that how it works for my physical PDP-11/23 RT11 system. Generally all the files that should be on a RT11 floppy needs to be on the tape. For other OSs it first has to fit on the device and have a suitable driver for TU58. Allison

Re: WTB: BYT-8 Computer/Chassis

Without boards the box is a common S100 crate and value is dime a dozen and costly to ship. That makes my complete working CCS system about the value of solid gold by weight. Allison

Re: If C is so evil why is it so successful?

OTO!) member its often the only choice to get something done. In the end its about getting something done. If your being paid more so and less choice. Allison

Re: TRS-80 curiosity

ions were timing critical for the Dram (bad implemntation). Allison

Re: TRS-80 curiosity

to the Model 1, but I think it worked with > some other devices too. > > -tony Maybe... The only device I know of like that was trs80 to a printer (Centronics or compatible ). Allison

Re: Bernie Appel, ‘Mr. RadioShack, ’ Dies ushered in TRS 80

siccmp.org> wrote: >> >> Bernie Appel, ‘Mr. RadioShack,’ Dies >> http://www.twice.com/news/people/bernie-appel-mr-radioshack-dies-85/64710 >> >> Ed# _www.smecc.org_ (http://www.smecc.org) > I got to know Bernie during the many trips to FT Worth in the very earliest days of TRS-80. He will be missed. Allison

Re: Stuffing boards with pulled QFP chips

On 03/31/2017 02:00 PM, Paul Koning wrote: >> On Mar 31, 2017, at 1:51 PM, allison via cctech <cct...@classiccmp.org> >> wrote: >> >> On 03/31/2017 06:32 AM, David Griffith via cctalk wrote: >>>> I'm down to the last few P112 boards for sale and am

Re: Stuffing boards with pulled QFP chips

on the board so it can locate and position without optical works. One time the board designer messed up and we had to use existing fixed points for that. PITA but it worked. After that I got into the board layout bit and DFM. Allison

Re: Cross-talk square-wave?

On 03/30/2017 06:01 PM, Brent Hilpert via cctalk wrote: > On 2017-Mar-30, at 1:13 PM, Noel Chiappa via cctalk wrote: >>> From: Allison >>> FYI this is the same problem designers hit with DRAMS back 40 years ago. >> This didn't ring (pun not intended) a bell for

Re: Cross-talk square-wave?

(equivalent). Also SD have two modes, one being SPI similar and the other a faster 4bit varient. I know that as I’ve used SD as “disk” for CP/M systems with 8085 and Z80. FYI this is the same problem designers hit with DRAMS back 40 years ago. Allison On Mar 29, 2017, at 4:06 PM, W2HX <w...@w2hx.

Re: Cross-talk square-wave?

of a transmission line and incorrectly handled you get reflections and ringing. Just like backplanes and all sorts of other media. Allison > Thanks! > > Noel

Re: QIX game on PDP-11

me was ported to the PDP-11 !! >> See http://imgur.com/a/gtPfh > > I don't know which PDP-11 that is either. It's a 3rd party card. > Anyone recognize it? > > -ethan Its defiantely J11 powered, the white ceramic chip carrier gives that away. Likely a J11 power Q or Unibus CPU of late vintage. Allison

Re: New addition to the collection

wish is the tech manual it is terrible and inaccurate to boot. Neat machine and moving toward getting 32k ram and bank 2 installed per club100. Allison

Re: MC68K's on DEUNA's

On 03/24/2017 04:02 PM, Paul Koning via cctalk wrote: >> On Mar 24, 2017, at 1:40 PM, allison via cctalk <cctalk@classiccmp.org> >> wrote: >> >> ... >> The 68K came in two major forms one was 16 bit bus the other was 8bit bus. > Isn't that the 68008? Ah y

Re: MC68K's on DEUNA's

ly to hurt the cpu. The other variants are package, mask revision levels ( due to bugs in the microcode) and Clock maximum. Allison > John Wilson > D Bit >

Re: MC68K's on DEUNA's

are mechanically interchangeable. The ceramic is smaller but the lead shape (bend) defines the landing point and the socket pin location. Allison

New addition to the collection

that will run on 8085 as not all that much required the Z80. The only requirement is 64K of ram from H and the as built memory management can do that. Allison

Re: I hate the new mail system

it functioning. Allison On Fri, Mar 17, 2017 at 11:42 AM, Dave Wade G4UGM via cctalk < cctalk@classiccmp.org> wrote: > > -Original Message- > > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Tor > > Arntsen via cctalk > > Sent: 17 March 2017 15:38 > &

Re: sourcing Atmel 29Cxxx series flash roms

none of those things without a UVlamp and an external programmer(most cases). The P112 can use all or any save for being in system writable if needed. Allison

Re: Aquired PDP 11/23

mpany that used a floppy drive (360K 5.25 or 720K for two sided) with a TU58 emulation that was somewhat faster than tape due to faster seeks to a block. Allison > Thanks, > Jonathan >

Re: Compaq Portable 286 and Portable III - IDE drives?

ing is the BIOS much be able to setup for the drive geometry, some only have a predefined list. That machine was seen with drives in the up to 340 or 420mb scale over time and larger than 40mb was not uncommon. If you can find a working ST3660A (500mb) that might be a good one to go with. I'd max the drive at 1Gb. Larger may not work. Allison

Re: Full immersion emulation

ave that's close to that is the homebrew S100 case with two 120cfm fans that blow across the boards and a pair of 8" shugart drives (with fans as well). Warms the room well and makes the power meter spin pretty good too. Allison

Re: Cassette Interface Assistance

, the signal simply bounces badly. I tried to > construct a low pass filter (22pF and 5K6), and some variations, but I > was not able to overcome. I then tried to deal with it in SW, but I > have not yet been successful. I'll try again, but lack of hysteresis > is a big issue. > Single transistor audio amp before it. Allison > Jim > >

Re: Cassette Interface Assistance

of ground to cover. Allison As you note, picking off 5V from inside, while entirely possible, is far from optimal, and a uC is the intended recipient. Besides, as Tony implies, I should know this stuff, but I have indeed managed to move along in my efforts for so many years without needing to use

Re: Cassette Interface Assistance

for FM and frequency shift based formats. Everyone had their own favorite. I used to flip a bit doing biphase in software at 2400 baud. Minimal parts to none. Allison Also, you may want to look at the IBM 5150 (PC) cassette circuit. My recollection was that it was pretty robust, even if few made

Re: Cassette Interface Assistance

On 2/28/17 1:17 PM, Ethan Dicks via cctalk wrote: On Tue, Feb 28, 2017 at 11:21 AM, allison via cctalk <cctalk@classiccmp.org> wrote: On 2/28/17 10:55 AM, Jim Brain via cctalk wrote: I have a cute idea for a cassette port project for the Tandy line of computers (the ones with the cassett

Re: Cassette Interface Assistance

On 2/28/17 12:09 PM, Paul Berger via cctalk wrote: 74LS of 74HC gates are not going to work, the signal level is only 1V the threshold for 74LS is 2V and for 74HC it is 3.7V. I would probably use something like a compatator or an opamp but I don't have a circuit handy to use, but tehy should

Re: Cassette Interface Assistance

. Why not just go inside and grab the signal at it source before any of the analog? it starts life at TTL waveforms (not 5V). Why are you trying to get to 5V in the first place? Allison Jim

Re: story of Mel

On 2/23/17 11:16 AM, Bill Gunshannon wrote: From: cctech [cctech-boun...@classiccmp.org] on behalf of allison [ajp...@verizon.net] Sent: Thursday, February 23, 2017 11:04 AM To: cct...@classiccmp.org Subject: Re: story of Mel On 2/23/17 3:23 AM, Pontus

Re: story of Mel

On 2/23/17 11:16 AM, Bill Gunshannon wrote: From: cctech [cctech-boun...@classiccmp.org] on behalf of allison [ajp...@verizon.net] Sent: Thursday, February 23, 2017 11:04 AM To: cct...@classiccmp.org Subject: Re: story of Mel On 2/23/17 3:23 AM, Pontus

Re: Q Bus Music Board

rinters play music and asr33s rattling out a crude version of Jingle bells complete with bell! Allison

Re: story of Mel

On 2/23/17 3:23 AM, Pontus Pihlgren wrote: On Wed, Feb 22, 2017 at 02:18:50PM -0500, allison wrote: The sound (not music) card was actually a internally built and not sold (that I know of). There must have been a few though, since several claim to have one and it even showed up on ebay. (I'm

Re: story of Mel

On 02/23/2017 03:23 AM, Pontus Pihlgren wrote: > On Wed, Feb 22, 2017 at 02:18:50PM -0500, allison wrote: >> The sound (not music) card was actually a internally built and not sold >> (that I know of). > There must have been a few though, since several claim to have one and &

Re: story of Mel

erface. See MINC-11 systems for more. The sound (not music) card was actually a internally built and not sold (that I know of). But people did use the D/A cards to do music by outputting in real time created waveforms or by toggling bits on parallel cards. Allison paul

Re: Q Bus Music Board

-0105e may be a document (spec or drawing). Allison

Re: RL02 version of UNIX6?

if the copy of V6 on RL02 is still there yep it is. and it runs on a 11/23 just fine as thanks to someone I have a copy on RL02 that I boot from time to time. Seems the problem is solved. If memory serves it cannot use more than 256K even if the machine is Q22. Allison

Re: DS12887 pcb substitute with battery

On 01/22/2017 02:46 PM, Chuck Guzis wrote: > On 01/22/2017 10:57 AM, allison wrote: >> I don't know about most people but this solution has been around for >> decades. >> >> I locate the battery on the failed part with a small magnet, then >> grind the

Re: DS12887 pcb substitute with battery

. There is no magic to this. Allison On 01/22/2017 01:20 PM, Ali wrote: > Jon, > Then why not use a dip compatible version of the DS chip? I mean yes this > allows for switchable battery which is very nice but SMT soldering is not for > everyone. > > I wonder if there is

Re: How do you clean your vintage computers?

anything inside. An AmproLB+, 3.5" floppies, Fujitsu scsi 45MB hard disk and a random power supply were fitted into it over 30 years ago and lives there still in it original DEC Gray 68. In the end cleaning has to do several things. Remove things that may be hazardous to the longevity of the unit(artifact) or the user. Bring the unit to a usable functional state. For the odd beauty pageant aka static non functional display items look like new and pretty. Allison

Re: Compatibility of 1101A and 1101A1

uld be fast enough. The slowest had no trailing suffux and that was 1.6us Allison > My guess is that it would work at some speed. > > Dwight > > > > From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Brad H > <vintagecompu...@bette

Re: 8085 IO ports

On 1/17/17 11:38 AM, Adrian Graham wrote: On 17 January 2017 at 02:14, allison <ajp...@verizon.net> wrote: snippage>>>>> <http://bitsavers.informatik.uni-stuttgart.de/pdf/intel/MCS80/MCS80_85_Users_Manual_Jan83.pdf> That's the later 1983 version but its

Re: 8085 IO ports

On 01/16/2017 08:37 PM, Adrian Graham wrote: > On 15/01/2017 16:59, "allison" <ajp...@verizon.net> wrote: > >>> I've thought of that which is why I'm chasing down details on the Viewdata >>> chip and the D8741A which I assume is being used as a keyboard

Re: Origins of the term 'WYSIWYG?

n use by group or system. BTDT HTS, been there did that have the t-shirt. Allison

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