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CONNECTICUT microCOMPUTER (CmC) |
Sun Ultra 1 Creator Needs Batteryby billdeg Total messages in this thread: 2 Updated: [ Video ] 01/17/2018  With a serial terminal attached, the Sun Ultra 1 workstation displays the point of failure upon boot. False color image taken without flash. Click image for larger view.
The keyboard lights when power is applied and it appears that the system attempts to read a CD if present in the CD ROM drive. That's kind of good news. Consistent with a bad NVRAM chip there is nothing coming through the hi-res display. I have 2 unformatted harddrives installed and a Solaris 9 CD (system came with it in the CD drive). I think the system is freezing when it gets to the point of attempting to access the CD drive, but that's just a hunch. Does not matter if there is something in the CD drive or not. The harddrives I have">... [ read more ]
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AT&T PC 7300by billdeg Total messages in this thread: 5 Updated: [ Video, Disassembly for repairs ] 01/17/2018  This AT&T PC 7300 was donated for study. The AT&T PC 7300 UNIX Computer from 1985. Serial Number 370429020 000139
So far I have tested the power and the memory, all OK. System originally booted up, but I did not have any login info so I decided to format the drive and re-install the OS from disks. There is a minimal OS 3.5.1 loaded for the moment. Doing research to determine next best action.
Pictures">... [ read more ]
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Sun Sparcstation 10by billdeg Total messages in this thread: 1  Cover removed to show the motherboard and attached componets of the Sun Sparcstation 10. Note ROSS processor upgrade and TurboXGX display card. Click image for larger view.
 This SCSI to SD adapter serves as hard drive. A lot faster and more reliable. Click image for larger view.
Installed an SD to SCSI drive and Jon Chapman (glitchworks) installed onto that Sun OS Release 4.1.4 from the internal CD drive (I think or external drive). Either way , it works. the only issue is that from the serial c">... [ read more ]
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NeXTstation Turboby billdeg Total messages in this thread: 1  The NeXTstation Turbo computer. The effort required to get this machine running was minimal. I was able to complete a usable network configuration within a few minutes. As with most NeXT systems it came installed with the NeXTStep version of Berkeley UNIX BSD, the grandfather of the MAC OS X. Click image for larger view.
 Here is a view of the motherboard, drives, and power supply. Click image for larger view.
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Object Photographyby billdeg Total messages in this thread: 1  An Atomic Instrument Company Model 111 computer tube module from the late 1950's early 60's. Click image for larger view.
 Program drum for an IBM 29 card punch (and similar models) punch card machine. Click image for larger view.
 SLT Logic module from an IBM 360 or 1800. Click image for larger view.
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NExT Cube Restorationby billdeg Total messages in this thread: 1  The NeXT N1000 or "NeXT Cube" computer. Click image for larger view.
 Here is a view of the NeXT Cube from the front with the chassis, optical drive and inner drive cover removed. The backplane is visible on the bottom with the motherboard (on it's side) and power supply (not visible) plugged into it. The system's internal full-height 5 1/4" hard drive sits unsecured upon the power supply, plugged into the motherboard from the back. The hard drive is an SCSI Seagate ST41200N. Click image for larger view.
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NextStation Colorby billdeg Total messages in this thread: 6 Updated: [ Replacing the Internal Battery ] 12/04/2017  The NextStation Color. Photo shows system while loading NextStep. Click image for larger view.
 Pictured Next's Sound Box, an I/O port station. A separate box is necessary because the color workstation display does not have internal speakers like the monochrome display. The NS Color I/O cable attaches to the back of the computer on one end and on the other end the cable is s">... [ read more ]
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Prevent VMS MULTINET SMTP Relay Hijacksby billdeg Total messages in this thread: 2 Updated: [ Apply SMTP security to Vax 4000-200 ] 12/02/2017 A VAX with VMS 5 that uses the MULTINET TCP/IP stack is vulnerable to third-party SMTP relay hijacks by any Tom-BOT-and-Harry probing around for a port 25 SMTP server. Case in point, my MicroVAX 3100 exposed to the outside Internet would clog up with queued relay messages in a matter of hours putting me at risk of being flagged by my ISP (Comcast). As a result I could not keep the machine online for an extended period. I decided to see if I could solve the problem at the VMS or MULTINET stack level. Yes it would be easier to simply install a modern router or firewall solution but what fun would that be? Here is an example message from the queue: $ show queue /full |
IBM DOS 3.30 on a Commodore BX700 CBM-IIby billdeg Total messages in this thread: 1  This stack of IEEE drives was used during testing of Michal Pleban's port of IBM DOS 3.30 to the CBM-II. Michal has a GITHUB page that explains how it works in detail but in short he created a PC compatibility layer that functions between the 8088 co-processor card on the CBM-II and the 6509 CPU on the main board. Click image for larger view.
 I used a Zoom Floppy with an IEEE adapter added to build the disks using CBM Transfer. This was tricky, the s">... [ read more ]
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Apple //GS (II GS) Batteryby billdeg Total messages in this thread: 1  Pictured is the original 1/2 AA Lithum battery dated 1/8/1987. The voltage measured from the terminals was nearly 0. Although the battery was not leaking yet, eventually it will leak and if left unchecked ruin the motherboard. So I snipped it off, leaving the posts still attached and folded out of the way. Click image to view larger version of image.
 Snip, battery removed. If I used this computer a lot I might put in a new battery, but it's not necessary">... [ read more ]
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Build a bootable RSX11/M on RL02 diskby billdeg Total messages in this thread: 2 Updated: [ Adding PDP 11 Programming ] 11/14/2017  Scan of my cover of the Digital pdp11 RSX-11M Beginner's Guide manual.
RSX-11M Manuals
http://wwcm.syn...0Manuals.html
This thread describes how one might use simH on a $9.95 Next Thing Co CHIP to make an RL02 image of RSX11/M V 4.0 BL 32 (BASELINE). I got the how-to via web search and clues from CCTECH and simH user group members interested in the project.
My case - For my PDP 11/40 I have no working EIS option card. (Otherwise I'd be using UNIX 6.) I already have RT11 running but I wanted to try RSX11. I was told that RSX11/M v.4.0 BL 3.2 is the newest OS version compatible with my system. Distribution media disk images for RSX11/M can be found in RL01 format but not RL02, so I had to first build one RL01 boot disk using 4 RL01s and then port to RL02.
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Donner 3500 - an early portable computerby billdeg Total messages in this thread: 9 Updated: [ Retro Thing Article ] 11/11/2017  The 1959 Donner 3500 portable analog computer. Click for larger image.
Pushing the exploration of portable computing one giant step farther (for me), here is a quick glimpse of the Donner 3500...My copy of the instruction manual was published in 1960, after Systron merged with Donner to form Systron-Donner Corporation. The manual depicts a Model 3500 with leather handles on the sides. The computer I have has metal handles on top, and I am unsure if this means it's an earlier model made before the merger or if the handles were added by the owner. Because they are symmetrical, I'd like to believe that they are factory/original handles. Also, this computer's serial number is 107, which also indicates an earlier version. Serial numbers can be deceiving however.">... [ read more ]
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1996 Digital AlphaServer 2100 4/275by billdeg Total messages in this thread: 9 Updated: [ Alpha Web Server ] 11/08/2017  The Digital Equipment Corp AlphaServer 2100 series model 4/275. This AlphaServer is powered by an Alpha 21064A microprocessor. Features include a 275-MHz CPU with 4 Mbyte cache; Click image for larger view.
 So far the system powers up, initializes and then fails to load an operating system. This machine would have been shipped with OpenVMS, Digital UNIX or Windows NT. Click image to see larger view.
M">... [ read more ]
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Digital VAX 4000-200by billdeg Total messages in this thread: 20 Updated: [ Updating User Disk Quota ] 11/06/2017  The Digital VAX 4000-200. Click for larger image.
 The SHOW DEV Output. Click for larger image. ">... [ read more ]
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Visual Commuter chassis removed
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Total messages in this thread: 2
Updated: [ ADA 1450 Printer Interface ] 02/02/2018