> On Mar 21, 2017, at 10:49 PM, W2HX via cctalk <cctalk@classiccmp.org> wrote: > > Hi folks, > > I have a PDP-8/e that I've been working on. I have completed construction of > AK6DN's RX01/02 emulator. I got to the step tonight where I was trying to > boot an OS/8 disk image and nothing was happening. I realized that I do not > have the bootstrap diode board in my 8/e so begin the bootstrap triggered by > the "SW" switch. > > Does anyone have the program I can toggle in for the bootloader? What I found > is somewhat confusing. Here is a discussion on this topic. > > https://groups.google.com/forum/#!searchin/alt.sys.pdp8/RX01$20boot|sort:relevance/alt.sys.pdp8/9-GCoA0PCLA/370T3R-Ru_AJ > > It seems one fellow was attempting to edit/improve the bootloader of another > fellow. I was wondering if anyone has distilled this into something simple. > At the moment, I care only about booting from RX01-Disk0. > > Any pointers greatly appreciated. Thanks > Eugene W2HX > The Data Systems Design DSD 440 Disk Drive Manual on page 5-34 has a PDP8 RX01 drive 0 Bootstrap. I can’t vouch for it personally.
The listing basically consists of • Load the following bootstrap sequence through the front panel., 33/ 6755 34/ 5054 35/ 5045 45/ 7326 46/ 6751 47/ 4053 50/ 3002 51/ 2050 52/ 5047 53/ 6753 54/ 6753 55/ 5033 56/ 6752 57/ 5453 60/ 7004 • Start at location 33. IF the diskette is write-protected, the computer will halt at location 7604. Pressing the CONTINUE (or run) switch on the front panel will then start the monitor. Additionally, if at any time the is halted and you wish to restart in the monitor, this can be done by the diagnostic diskette in drive 0 and restarting at location 7605. Note: The halt/restart locations applies to a vendor supplied diagnostic. Good luck, Jerry WB9MRI