[cctalk] Re: OLD ftp.compaq.com Mirror?

2023-07-11 Thread Grant Taylor via cctalk
On 7/10/23 1:18 PM, Ali wrote: Hi Grant, Hi Ali, I am currently looking for the following: Firmware for the MSL5000 Tape Library (version 5.20). The file name would be something like Nextgen_520.bin. The MSL5000 is a rebranded Overland library. Apparently you could have used the original

[cctalk] Re: Talking PDP11

2023-07-11 Thread Paul Koning via cctalk
> On Jul 11, 2023, at 3:06 PM, Marc Howard via cctalk > wrote: > > Try 1970. > https://www.vintagecomputermusic.com/notran_system.php > > I worked in the same (computer graphics) lab with Hal. He wrote the > seminal book on microprocessor generated music and later worked at Kurzweil. That

[cctalk] Re: Talking PDP11

2023-07-11 Thread Marc Howard via cctalk
Try 1970. https://www.vintagecomputermusic.com/notran_system.php I worked in the same (computer graphics) lab with Hal. He wrote the seminal book on microprocessor generated music and later worked at Kurzweil. Marc Howard On Tue, Jul 11, 2023 at 1:10 PM Martin Bishop via cctalk <

[cctalk] Re: IBM 1410 FPGA Status

2023-07-11 Thread Jay Jaeger via cctalk
Yes, as it was part and parcel of every 1410. but I have not tested it yet. Sent from my iPad > On Jul 11, 2023, at 12:06, Van Snyder via cctalk > wrote: > > On Mon, 2023-07-10 at 21:32 -0500, Jay Jaeger via cctalk wrote: >> Over the past couple of months I have been working on my FPGA >>

[cctalk] Re: Talking PDP11

2023-07-11 Thread Martin Bishop via cctalk
For info on DAC internals, have a look at https://www.analog.com/en/education/education-library/analog-digital-conversion-1986.html Part 2 details basic A/D & D/A architectures Current output converters are: - less common than voltage output DACs - and, if a ladder conversion architecture is

[cctalk] Re: IBM 1410 FPGA Status

2023-07-11 Thread Van Snyder via cctalk
On Mon, 2023-07-10 at 21:32 -0500, Jay Jaeger via cctalk wrote: > Over the past couple of months I have been working on my FPGA > implementation of the IBM 1410 1960's era pre System/360 system again. > I am pleased to share that the CPU now passes a significant diagnostic, > CU01, which tests

[cctalk] Re: Talking PDP11

2023-07-11 Thread Nigel Johnson via cctalk
I wouldn't want to violate my NDA! On July 11, 2023 12:42:57 p.m. EDT, Douglas Taylor via cctalk wrote: >Funny you mention that, I've got a Data Translation DT2766 and it is identical >to the AAV11-C.  I mean identical!  In the day DT must have sold them based on >2 selling points: (1)

[cctalk] Re: Talking PDP11

2023-07-11 Thread Douglas Taylor via cctalk
Funny you mention that, I've got a Data Translation DT2766 and it is identical to the AAV11-C.  I mean identical!  In the day DT must have sold them based on 2 selling points: (1) Cheaper than DEC and (2) Exact drop in replacement for the DEC AAV11-C. Doug On 7/11/2023 12:33 PM, Nigel

[cctalk] Re: Talking PDP11

2023-07-11 Thread Nigel Johnson via cctalk
You might try looking for Data Translation products. I know some of the later ad and da modules were made by them for DEC On July 11, 2023 12:28:43 p.m. EDT, Douglas Taylor via cctalk wrote: >The DACs on the AAV11-C board are not marked in any revealing way.  I think >they are Burr Brown

[cctalk] Re: Talking PDP11

2023-07-11 Thread Paul Koning via cctalk
> On Jul 11, 2023, at 11:20 AM, Will Cooke via cctalk > wrote: > > > >> On 07/11/2023 9:59 AM CDT Paul Koning via cctalk >> wrote: > > >> But, judging by Wikipedia, the earlier Synclavier models were not digital >> sampled waveform synthesizers but rather FM synthesizers. So I still

[cctalk] Re: Talking PDP11

2023-07-11 Thread Douglas Taylor via cctalk
The DACs on the AAV11-C board are not marked in any revealing way.  I think they are Burr Brown DAC80, 24 pin, but I'm not sure.  I wasn't sure if they were working and was looking for a replacement. Looking at the spec sheets DAC's seem to come in Voltage or Current versions.  Life got more

[cctalk] Re: Talking PDP11

2023-07-11 Thread Mike Katz via cctalk
I originally used R-2R DACs but I was lucky enough to be able to buy a couple of DAC08 chips at Radio Shack and built a circuit using 74LS244 latching buffers so that I could drive both channels of a single 8-bit parallel port and 2 extra control lines (Select and Strobe). On 7/11/2023 6:43

[cctalk] Re: Talking PDP11

2023-07-11 Thread Will Cooke via cctalk
> On 07/11/2023 9:59 AM CDT Paul Koning via cctalk > wrote: > But, judging by Wikipedia, the earlier Synclavier models were not digital > sampled waveform synthesizers but rather FM synthesizers. So I still wonder > if anyone did it earlier than Sherwin. > > paul Possibly the Computer

[cctalk] Re: Talking PDP11

2023-07-11 Thread Paul Koning via cctalk
> On Jul 11, 2023, at 11:11 AM, Bill Degnan via cctalk > wrote: > > Coincidentally I am doing research into this topic and here is a great > article that you all would find on topic to this discussion > >

[cctalk] Re: Talking PDP11

2023-07-11 Thread Bill Degnan via cctalk
Coincidentally I am doing research into this topic and here is a great article that you all would find on topic to this discussion https://www.vintagecomputer.net/CISC367/creative%20computing%20mar-apr%201977%20UDel-Sound-Synthisizer.pdf I have one of the U of Delaware Plato Synths btw...working

[cctalk] Re: Talking PDP11

2023-07-11 Thread Paul Koning via cctalk
> On Jul 11, 2023, at 10:51 AM, William Donzelli via cctalk > wrote: > > The Synclavier I was commercially available in 1977, based off the > Dartmouth Digital Synthesizer of earlier times. The core was a New > England Digital minicomputer architecture (they did sell just the > minicomputer

[cctalk] Re: Talking PDP11

2023-07-11 Thread William Donzelli via cctalk
The Synclavier I was commercially available in 1977, based off the Dartmouth Digital Synthesizer of earlier times. The core was a New England Digital minicomputer architecture (they did sell just the minicomputer to the military, as a side). The truth is that there were quite a few digital synths

[cctalk] Re: Talking PDP11

2023-07-11 Thread W2HX via cctalk
And by 1979 there was the fairlight... https://en.wikipedia.org/wiki/Fairlight_CMI 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos >Speaking of old computerized music playing technology, there are two from the >PLATO system at the University of Illinois

[cctalk] Re: Talking PDP11

2023-07-11 Thread Paul Koning via cctalk
> On Jul 11, 2023, at 7:43 AM, ste...@malikoff.com steven--- via cctalk > wrote: > >> On 07/10/2023 11:31 PM AEST Mike Katz via cctalk >> wrote: >> Way back in the 80's I was able to do stereo 4 part harmony on a 2 MHZ >> 6809 using two 8-bit D/A converters. > > Much the same here. I

[cctalk] Re: Talking PDP11

2023-07-11 Thread ste...@malikoff.com steven--- via cctalk
> On 07/10/2023 11:31 PM AEST Mike Katz via cctalk > wrote: > Way back in the 80's I was able to do stereo 4 part harmony on a 2 MHZ > 6809 using two 8-bit D/A converters. Much the same here. I recounted this on VCFed a few months ago about building a simple 2-chip 8-bit ladder DAC with

[cctalk] IBM 1410 FPGA Status

2023-07-11 Thread Jay Jaeger via cctalk
Over the past couple of months I have been working on my FPGA implementation of the IBM 1410 1960's era pre System/360 system again. I am pleased to share that the CPU now passes a significant diagnostic, CU01, which tests almost all of the instructions, and also tests I/O with overlap and the