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Hello All, I'm running RT-11XM V5.07 on a PDP-11/53 with 3.5MB of RAM. I have some files on a PC that I would like to get on to a PDP-11 disk... The only way I can think of doing it is using KERMIT. I found KERMIT.SAV on an RX33 floppy, but when I try to invoke it I get the following error...

Hello All, I have a couple of systems that I am working with... one is a PDP-11/53 and the other is a MicroVAX2 (KA630 CPU), both in BA23 chassis. I have been experimenting with the GOTEK floppy emulator running the latest version of FlashFloppy, and I have it working fine as an RX33 with the...

Hello All, I've noticed that there any number of VT10x monitors for sale on Ebay, but without the standard VT100 keyboard to go with them, and if you can find a keyboard, they are pretty pricey. I managed to get my hands on a VT101 monitor (no keyboard), and I decided to design a board that...

Hello All, I've been working with a couple of TK50 tape drives, and I have them working with my PDP-11/53. I can read, write, and delete files, and I can make backups of the hard drives. The things that are hard to come by are actual tape cartridges with useful data on them. So, I am...

Hello All, Not too long ago I picked up a VT101 monitor for $100... it was unknown if it worked, but if it didn't I wasn't out too much. It did not have a keyboard, so my first step in getting it together was to build an interface that would convert a PS/2 keyboard to the VT100 keyboard...

Hello All, I am starting a journey with a microvax... I have a KA650 CPU and two 16MB memory boards installed in the first three slots of a H9278-A backplane. I have the CPU patch panel and have wired the console output to my laptop via an RS-232-to-USB device. Upon power-up, the console...

Hello All, I've been starting to mess around with MicroVAX stuff lately, and I got my hands on the monochrome display board used in many of the VAXStation configurations: M7602/VCB01/QVSS. I wasn't able to find any documentation on the 20-pin IDC connector that ideally would go to a patch...

Hello All, I'm assembling a PDP-11/53 in a BA23 chassis with the H7864-A power supply, which I understand has selectable Fan voltages. There are three posts on the fan power supply board marked as 1, 2, and 3, and a wire with a socket on the end that looks like it is meant to fit on one of...

Hello All, I'm trying to put together an accurate version of the PDP-11/53+, using the following modules: KDJ11-DB CPU with 1.5MB of DRAM, MSV11-QA 1MB DRAM DLV11-J quad SLU RQDX3 HDD/FDD controller BA23 chassis that formerly held a Microvax II I read in the 1987 PDP-11 Systems Handbook that...

Hello All, I have a Camintonn CMV-1000 1MB memory board that I picked up at a good price, expecting that it might have a few problems (it does). I can't find documentation for it, and so I suspect that some of my problems are due to start/end address switch settings. Does anyone have this...

Hello All, I am on a mission to track down the details of this ECO, which, as I understand it, is applied to an etch rev D to correct an IO register addressing anomaly. The information I have regarding this problem and ECO is from one of the micronote documents, which is quoted below. I have...

Hello All, I bought an M7264 etch rev E board (KD11-AB?) that was pretty cheap as it was identified as non-functional. I discovered that there was a bad DRAM in the onboard memory, so I carefully replaced it and now it can operate properly from the on-board memory. I'm wondering what can be...

Hello All, I've built a small system consisting of: M7264-YC PDP-11/03 CPU with no on-board DRAM M8044-DH 32KW DRAM (only 28KW is exposed to the system) M8043 Four-port SLU module (DLV11-J) I have it running RT-11SB V05.07 by booting from the TU58FS emulator. I would like to run...

Hello All, I see in various places that the KDJ11-AA CPU module had a flaw that rendered it incompatible with the FPJ11 floating point accelerator component, but that it could be upgraded to be compatible. From micronote25: "The KDJ11-AA can be upgraded to be FPJ11-AA compatible...

Hello All - Can I use this backplane with the LSI-11/03 if I just avoid using the first three slots that are mixed QQ and CD? I was thinking that I could put the CPU in slot 4, then continue with RAM, SLU, and then boot ROM modules. Thanks, Jon.

Hello All, I have a KDF11-A CPU board that is missing it's CPU and MMU (I transferred them to a KDF11-B CPU board that I repaired that came without those components). I would like to get the KDF11-A functional again... Does anyone have the CPU and MMU components that they would be willing to...

Hello All, I have a couple of KDF11-B CPU boards and I have been running diagnostics on them, with some puzzling results. The diags I have been running are: JKDJB0: KDF11-B CPU-BOARD M8189 GO-NOGO TEST JKDL5B0: KDF11-BE CPU-BOARD M8189 GO-NOGO TEST The first diagnostic always fails with the...

Hello All, I got my hands on what looks like a clone of the M8043 quad serial channel module. It is manufactured by "Technical Magic Inc." and uses the same IM6042 UARTs as the actual M8043 board. Unfortunately, I cannot find any documentation about the many jumper options and so I don't know...

Hello All, I'm working on restoring a TK50 tape drive, and I have a question or two about the steel rollers that flank the read/write head. Are they supposed to spin freely? In the drive I'm working with, they do not spin as the tape is pulled past them, and they do not spin freely. I am...

Hello All, I'm trying to add a TK50 to my PDP-11/53, and I sourced the drive and controller separately. In the guide for the TK50, it says of the controller: "Make sure the revision level DIP switch matches the revision level of the module. The revision level is stamped on the back of the...