Re: eval() considered dodgy - Re: Self modifying code, lambda calculus - Re: ENIAC programming

2015-09-20 Thread Liam Proven
On 19 September 2015 at 19:45, Toby Thain wrote: > Thank God nobody would build such a thing into a modern language, especially > not the one that runs in almost every browser... Well, quite. :-) Or rather, :-( -- Liam Proven • Profile: http://lproven.livejournal.com/profile Email: lpro...@ci

Re: Self modifying code, lambda calculus - Re: ENIAC programming

2015-09-20 Thread Liam Proven
On 19 September 2015 at 19:53, tony duell wrote: > A lot of disk-based BASICs had a statement that would merge a program from > disk in this way. Sometimes the program had to be saved in ASCII, not > tokenised, > the BASIC interpretter then essentially read the file as if you were typing > it on

Re: Backups [was Re: Is tape dead?]

2015-09-20 Thread Liam Proven
On 20 September 2015 at 05:58, John Foust wrote: > Someone's demonstrated you can hide in the firmware of hard drives. And access the hypervisor layer of an OS in various ways from programs executing inside a VM. So, for instance, much malware self-inactivates if it detects that it's running ins

Re: IBM 026

2015-09-20 Thread Able Baker
"My parents sold their 57 Chevy station wagon for $50 in 1965.  What is it  worth now?" Good question.Condition unspecified and 50 years ago.Certainly a 'valid' point. Maybe Todd's new toy will be worth a lot of money in about 50 years,if he gets it working and somebody living in 2065 remembers wh

Re: IBM 026

2015-09-20 Thread Able Baker
You 'people' certainly have a way with words...You should be very proud of your command of the English language. From: Todd Goodman To: General Discussion: On-Topic and Off-Topic Posts Sent: Saturday, September 19, 2015 11:24 PM Subject: Re: IBM 026 * William Donzelli [150919 19:4

Re: IBM 026

2015-09-20 Thread Noel Chiappa
> From: Marc Verdiell > thanks for taking care of a rare 026. Actually, IIRC this was an 029 - thread drift, after LCM (IIRC) enquired about a punch - for them, an 029 seemed as good as an 026. > this community is about celebrating people that have an interest in > saving old va

Re: Self modifying code, lambda calculus - Re: ENIAC programming

2015-09-20 Thread Peter Coghlan
> > But in everything from ZX BASIC to BBC BASIC to GWBASIC, loading a > program erases all lines of code in interpreter RAM and replaces the > whole program with the one loaded from disk, but leaves variables etc. > intact. > BBC BASIC (when running on a BBC Micro at least) does clear (most) vari

Re: Self modifying code, lambda calculus - Re: ENIAC programming

2015-09-20 Thread Rod Smallwood
On 20/09/2015 11:52, Liam Proven wrote: On 19 September 2015 at 19:53, tony duell wrote: A lot of disk-based BASICs had a statement that would merge a program from disk in this way. Sometimes the program had to be saved in ASCII, not tokenised, the BASIC interpretter then essentially read the

Re: IBM 026

2015-09-20 Thread Rod Smallwood
On 20/09/2015 05:45, Able Baker wrote: You 'people' certainly have a way with words...You should be very proud of your command of the English language. From: Todd Goodman To: General Discussion: On-Topic and Off-Topic Posts Sent: Saturday, September 19, 2015 11:24 PM Subject: Re

VARM revision J transcription

2015-09-20 Thread Mouse
Something like two and a half years ago, I got a copy of EL-00032-00-decStd32_Jan90.pdf, a one-image-per-page scan of a paper copy of the VAX Architecture Reference Manual. I don't know where I got it, but bitsavers has a file of the same name with the same MD5 checksum at /pdf/dec/vax/archSpec/EL

RE: IBM 026

2015-09-20 Thread tony duell
> Indeed, this whole list is about people saving computers that don't really > have any _practical_ use any more. By definition, from a purely _functional_ > perspective, their value is scrap. But our viewpoint is not that - we see > them as interesting and historic artifacts - and in that light,

Re: Backups [was Re: Is tape dead?]

2015-09-20 Thread John Foust
At 05:57 AM 9/20/2015, Liam Proven wrote: >On 20 September 2015 at 05:58, John Foust wrote: >> Someone's demonstrated you can hide in the firmware of hard drives. > >And access the hypervisor layer of an OS in various ways from programs >executing inside a VM. Yeah, that too. The easy recombinat

Re: Self modifying code, lambda calculus - Re: ENIAC programming

2015-09-20 Thread Liam Proven
On 20 September 2015 at 13:54, Peter Coghlan wrote: > BBC BASIC (when running on a BBC Micro at least) does clear (most) variables > when a program is loaded. Most variables are stored in memory above the > program and if a small program was replaced by a larger program, some could > get > overw

RE: IBM 026

2015-09-20 Thread Jay West
I apparently put Abel on Mod rather than UnSub, and then moderators approved the messages. Now he's been unsubbed and I checked both lists. However, be aware the list archives are public. J

Re: Self modifying code, lambda calculus - Re: ENIAC programming

2015-09-20 Thread Peter Coghlan
On Sun, 20 Sep 2015 at 16:47:50 +0200 Liam Proven wrote: > On 20 September 2015 at 13:54, Peter Coghlan wrote: > > BBC BASIC (when running on a BBC Micro at least) does clear (most) variables > > when a program is loaded. Most variables are stored in memory above the > > program and if a small p

RE: IBM 026

2015-09-20 Thread W2HX
People who say that someone has 'more money than common sense' usually have neither. -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Todd Goodman Sent: Saturday, September 19, 2015 7:42 PM To: Able Baker Cc: General Discussion: On-Topic and Off-Topic P

Re: Self modifying code, lambda calculus - Re: ENIAC programming

2015-09-20 Thread Chuck Guzis
On 09/20/2015 09:00 AM, Peter Coghlan wrote: CHAIN is roughly equivelant to LOAD followed by RUN. Unlike LOAD, CHAIN can be issued from a program so it can be used for a kind of overlay where one program is run and then replaced by another program when it completes. However, like LOAD (and RU

Re: Backups [was Re: Is tape dead?]

2015-09-20 Thread Jon Elson
On 09/19/2015 10:58 PM, John Foust wrote: The other recent development that makes me want to quit? Someone's demonstrated you can hide in the firmware of hard drives. https://blog.kaspersky.com/equation-hdd-malware/7623/ - John Well, one would assume this is also OS specific. I would guess i

Re: Backups [was Re: Is tape dead?]

2015-09-20 Thread ben
On 9/20/2015 11:53 AM, Jon Elson wrote: On 09/19/2015 10:58 PM, John Foust wrote: The other recent development that makes me want to quit? Someone's demonstrated you can hide in the firmware of hard drives. https://blog.kaspersky.com/equation-hdd-malware/7623/ - John Well, one would assume this

Re: Calcomp 1039 plotter docs?

2015-09-20 Thread Jon Elson
On 09/20/2015 09:38 AM, simon wrote: Hi All, we have a 1039 in our space with the user guide, but without any service docs. Our specimen does not react to buttons except the reset and test buttons. the four statusleds light up on a reset and after a second the center two leds start blinking

Calcomp 1039 plotter docs?

2015-09-20 Thread simon
Hi All, we have a 1039 in our space with the user guide, but without any service docs. Our specimen does not react to buttons except the reset and test buttons. the four statusleds light up on a reset and after a second the center two leds start blinking in sequence. paper and pens are loaded

RE: Calcomp 1039 plotter docs?

2015-09-20 Thread tony duell
> Hi All, > > we have a 1039 in our space with the user guide, but without any service > docs. Our specimen does not react to buttons except the reset and test > buttons. the four statusleds light up on a reset and after a second the > center two leds start blinking in sequence. paper and pens are

Re: Backups [was Re: Is tape dead?]

2015-09-20 Thread Fred Cisin
On Sun, 20 Sep 2015, Jon Elson wrote: Well, one would assume this is also OS specific. I would guess it would be incredibly hard to make a "disk" virus that would work on greatly differing OS's like Linux AND Windows. No telling what would happen if one of these disk viruses got onto a hard d

RE: Backups [was Re: Is tape dead?]

2015-09-20 Thread tony duell
> It is possible to create an executable file that identifies the OS that it > is running on and does a conditional jump to different code, assuming that > the processor uses the same instruction set. In some cases it should be possible to write a machine code program that executes on 2 processo

Re: Backups [was Re: Is tape dead?]

2015-09-20 Thread Mouse
>> I would guess it would be incredibly hard to make a "disk" virus >> that would work on greatly differing OS's like Linux AND Windows. This is actually a good reason to encrypt your whole disk. The disk can't serve up working malware if the bits it returns get mangled by decryption with an unkn

Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Fred Cisin
It is even possible to make a disk that is readable as multiple disk formats, so long as each is expecting the DIRectory tracks to be in different places. On Sun, 20 Sep 2015, tony duell wrote: So when used under OS-9 it acts normally (directory where the OS expects to find it), just with this a

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread ben
On 9/20/2015 2:19 PM, Fred Cisin wrote: There were several reasons why there was never a STANDARD 5.25" CP/M format. I once had the opportunity to ask Gary Kildall what the standard would be for 5.25". He replied, "8 inch single sided single density". I repeated, "Yes, but waht about 5.25"?

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Fred Cisin
On Sun, 20 Sep 2015, ben wrote: I was just digging in to old CP/M a bit and it was/is tied mostly to the IBM 8" standard floppy and the floppy interface used at the time. Even that gave a very small amount memory per track. Ben. single sided FM/SD 77 tracks, 26 sectors per track, 128 bytes per

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Chuck Guzis
On 09/20/2015 03:03 PM, Fred Cisin wrote: On Sun, 20 Sep 2015, ben wrote: I was just digging in to old CP/M a bit and it was/is tied mostly to the IBM 8" standard floppy and the floppy interface used at the time. Even that gave a very small amount memory per track. Ben. single sided FM/SD 77 t

Re: Backups [was Re: Is tape dead?]

2015-09-20 Thread Jerome H. Fine
>Fred Cisin wrote: On Sun, 20 Sep 2015, Jon Elson wrote: Well, one would assume this is also OS specific. I would guess it would be incredibly hard to make a "disk" virus that would work on greatly differing OS's like Linux AND Windows. No telling what would happen if one of these disk vir

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Jerome H. Fine
>Chuck Guzis wrote: >On 09/20/2015 03:03 PM, Fred Cisin wrote: >On Sun, 20 Sep 2015, ben wrote: I was just digging in to old CP/M a bit and it was/is tied mostly to the IBM 8" standard floppy and the floppy interface used at the time. Even that gave a very small amount memory per track. Ben.

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Fred Cisin
single sided FM/SD 77 tracks, 26 sectors per track, 128 bytes per sector 256,256 bytes (250.25K) On Sun, 20 Sep 2015, Chuck Guzis wrote: There was a good reason for that. Many early disk controllers did not have a "write index to index" fucntion that also enabled writing special (i.e. missing c

DEC Alpha 3000 Model 600

2015-09-20 Thread Rod Smallwood
I'm pleased to be able to report the successful installation of OpenVMS 8.3 - Alpha on my 3000 M600 It now runs Dec Windows on the graphics screen and a terminal on the serial port. TCPIP works and I can get to my local network OK. Now to find a browser. There must have been one Rod -- Want

Re: DEC Alpha 3000 Model 600

2015-09-20 Thread Jason Howe
On 09/20/2015 05:41 PM, Rod Smallwood wrote: I'm pleased to be able to report the successful installation of OpenVMS 8.3 - Alpha on my 3000 M600 It now runs Dec Windows on the graphics screen and a terminal on the serial port. TCPIP works and I can get to my local network OK. Now to find a b

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Chuck Guzis
On 09/20/2015 05:32 PM, Fred Cisin wrote: But, I had thought that there should then be a SECOND standard for 5.25", for those machines without 8" support. Gary disagreed. Having more than ONE "standard" makes it not completely a standard. Still, a 5.25" "recommended" format, or a specific fami

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread ben
On 9/20/2015 7:55 PM, Chuck Uzis wrote: So it was still fragmented. So did it matter? You ran Basic or played games from cassete. That was for domestic systems, heaven help you lived out of USA for computers. --Chuck Ben.

Re: TSS/8 with modern disks?

2015-09-20 Thread Charles
OK, there does appear to be larger disk support... now how about for RL02? Unfortunately the drive is not as smart as an RK (can't do spiral read/writes) so that would complicate things. However, each side of cylinder 0 is about 10KB, so 20K is available without having to move the drive head. I

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Jon Elson
On 09/20/2015 03:46 PM, ben wrote: On 9/20/2015 2:19 PM, Fred Cisin wrote: There were several reasons why there was never a STANDARD 5.25" CP/M format. I once had the opportunity to ask Gary Kildall what the standard would be for 5.25". He replied, "8 inch single sided single density". I

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Chuck Guzis
On 09/20/2015 07:59 PM, ben wrote: So did it matter? You ran Basic or played games from cassete. That was for domestic systems, heaven help you lived out of USA for computers. Gee, I thought we were talking about CP/M here. How many CP/M systems used cassette for storage. Better yet, how ma

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Fred Cisin
On Sun, 20 Sep 2015, ben wrote: So did it matter? You ran Basic or played games from cassete. Sure. But, I was never happy with cassette for program nor data storage. I bought an Expansion Interface the day that it became available, but I never bought a drive from Radio Shack nor IBM. Bare

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread ben
On 9/20/2015 9:12 PM, Chuck Guzis wrote: On 09/20/2015 07:59 PM, ben wrote: So did it matter? You ran Basic or played games from cassete. That was for domestic systems, heaven help you lived out of USA for computers. Gee, I thought we were talking about CP/M here. How many CP/M systems used

RE: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread tony duell
> > For both the DEC RX01 and the DEC RX02 8" floppy drives, > while it might have been possible that DEC engineers were unable > to initially figure out how to allow users to perform an LLF (Low > Level Format) on the 8" floppy drives, it seems certain that after > 3rd party manufactures figure

RE: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread tony duell
> > Gee, I thought we were talking about CP/M here. How many CP/M systems > used cassette for storage. Better yet, how many commerical/industrial > CP/M systems used cassettes for program storage. Epson PX8? -tony

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Chuck Guzis
On 09/20/2015 08:48 PM, ben wrote: OS/9 was nice for the 6809 but all I had was 1 floppy with the COCO II. Ben. Before I got a (dual) floppy drive with my personal system, I used a Techtran dual cassette drive. One side was read-write, the other was read-only.It was intended as a substi

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Chuck Guzis
On 09/20/2015 09:55 PM, tony duell wrote: Gee, I thought we were talking about CP/M here. How many CP/M systems used cassette for storage. Better yet, how many commerical/industrial CP/M systems used cassettes for program storage. Epson PX8? That's a commercial or industrial system? Did

RE: Calcomp 1039 plotter docs?

2015-09-20 Thread Erik Baigar
Hi All, the 1039 is an interesting plotter I have got a 1038/1039 as well: There are two big PCBs inside - one is for the low level functions (essentally driving the servos and drawing lines using TTL implemented Bresenham) the second one contains the computer (68xx based) which is handling the

Re: Multi-platform distribution format (Was: Backups [was

2015-09-20 Thread Holm Tiffe
tony duell wrote: > > > > For both the DEC RX01 and the DEC RX02 8" floppy drives, > > while it might have been possible that DEC engineers were unable > > to initially figure out how to allow users to perform an LLF (Low > > Level Format) on the 8" floppy drives, it seems certain that after >