Tag Archive

microRSX-11 RX50 distribution

microRSX-11 is a expanded subset of RSX-11/M plus and was targetted at the microPDP-11 family of machines. Here is an archive of a distribution set of RX50 floppies I was recently given:

Image Name
Label
Description

URSX1INS.DSK
MICRO/RSX V1 RX50 INSTALL (BL-Z022A-BC)

URSX1OS1.DSK
MICRO/RSX V1 RX50 1/6 (BL-Z023A-BC)

URSX1OS2.DSK
MICRO/RSX V1 RX50 2/6 (BL-Z024A-BC)

URSX1OS3.DSK
MICRO/RSX V1 RX50 3/6 (BL-Z025A-BC)

URSX1OS4.DSK
MICRO/RSX V1 RX50 4/6 (BL-Z026A-BC)

URSX1OS5.DSK
MICRO/RSX V1 RX50… »

RT-11 RX50 Disk Images

In my missing to archive all software I have for my PDP-11, I’ve spent some time working through my RX50 disks. Here are the results of my labours
I archived them using John Wilsons excellent PUTR utility using a PC fitted with a 5.25″ floppy drive (as drive B:). Here is the process I used:

Start up… »

Software Archiving

One of my main fears with my collection is loosing software over time as disks slowly decay. DEC media has proven amazingly resilient with many of my disks well over 30 years old. The reality is though that they won’t last forever and so I’ve decided now is the time to start a program of… »

HOWTO: Create a MSCP MAP in RT-11

RT-11 is restricted to each devices is limited to 32MB of usable space. This is due to the filesystem using a 16-bit field to represent blocks, giving a maximum of 65535 x 512 byte blocks.
For larger MSCP disks, such as RD53, RD54, RA series and third party disks, all is not lost. Within RT-11 a… »