--- layout: page title: Diagnostic Paper Tape Images permalink: /apps/pdp11/tapes/diags/ --- Diagnostic Paper Tape Images ---------------------------- Thanks to the [iamvirtual.ca](http://iamvirtual.ca/collection/systems/mediadoc/mediadoc.html#papertape) website, we have archived the PDP-11 diagnostics shown below. The tapes have been added to the [Default PC11 Configuration](/devices/pdp11/pc11/), so that you can easily load them into any machine with a [PC11](/modules/pdp11/lib/pc11.js), such as this [PDP-11/20](/devices/pdp11/machine/1120/panel/debugger/). As noted for other [DEC PDP-11 Tape Images](/apps/pdp11/tapes/), these "Absolute Format" tapes can be loaded directly into RAM using the machine's "Load" button instead of "Attach", allowing you to bypass the usual three-step process of loading the [Bootstrap Loader](/apps/pdp11/boot/bootstrap/) in order to load the [Absolute Loader](/apps/pdp11/tapes/absloader/) in order to load the desired tape. ![MAINDEC-11-D0AA-PB (MAR/70): TEST 1 - BRANCH](MAINDEC-11-D0AA-PB.jpg) ![MAINDEC-11-D0BA-PB (MAR/70): TEST 2 - CON BRANCH](MAINDEC-11-D0BA-PB.jpg) ![MAINDEC-11-D0CA-PB (MAR/70): TEST 3 - UNARY](MAINDEC-11-D0CA-PB.jpg) ![MAINDEC-11-D0DA-PB (MAR/70): TEST 4 - UNARY + BINARY](MAINDEC-11-D0DA-PB.jpg) ![MAINDEC-11-D0EA-PB (MAR/70): TEST 5 - ROTATE SHIFT](MAINDEC-11-D0EA-PB.jpg) ![MAINDEC-11-D0FA-PB (MAR/70): TEST 6 - COMPARE](MAINDEC-11-D0FA-PB.jpg) ![MAINDEC-11-D0GA-PB (MAR/70): TEST 7 - COMPARE NOT](MAINDEC-11-D0GA-PB.jpg) ![MAINDEC-11-D0HA-PB (MAR/70): TEST 8 - MOVE](MAINDEC-11-D0HA-PB.jpg) ![MAINDEC-11-D0IA-PB (MAR/70): TEST 9 - BIS, BIC + BIT](MAINDEC-11-D0IA-PB.jpg) ![MAINDEC-11-D0JA-PB (MAR/70): TEST 10 - ADD](MAINDEC-11-D0JA-PB.jpg) ![MAINDEC-11-D0KA-PB (MAR/70): TEST 11 - SUBTRACT](MAINDEC-11-D0KA-PB.jpg) ![MAINDEC-11-D0LA-PB (MAR/70): TEST 12 - JUMP](MAINDEC-11-D0LA-PB.jpg) ![MAINDEC-11-D0MA-PB (FEB/70): TEST 13 - JSR, RTS, RTI](MAINDEC-11-D0MA-PB.jpg) ![MAINDEC-11-D0NA-PB (APR/70): TEST 14 - TRAP TEST](MAINDEC-11-D0NA-PB.jpg) Instructions for Running Diagnostics ------------------------------------ ### Tests 1-12 Instructions for running "TEST 1 - BRANCH" through "TEST 12 - JUMP" come from the [MAINDEC USER REFERENCE MANUAL, OCTOBER 1973](http://archive.pcjs.org/pubs/dec/pdp11/diags/MAINDEC_User_Reference_Manual_Oct73.pdf), p. 19: MAINDEC-11-D0AA to D0LA (NEW NUMBER - DZKAA to DZKAL) T1 to T12 ABSTRACT This is a group of 12 tests that incrementally test and isolate simple malfunctions of the PDP-11. The tests should be run in the indicated numerical sequence. The sequence is: 1. Branch 2. Conditional Branch 3. Unary 4. Unary and Binarys 5. Rotate/Shift 6. Compare (Equality) 7. Compare (non equality) 8. Move 9. Bit Set, Clear and Test 10. Add 11. Subtract 12. Jump REQUIREMENTS PDP-11 STORAGE - Use all of 4K [words] except 17500 - 17776 (Reserved for boot and absolute loader) LOADING - Absolute Loader EXECUTION TIME - 246 min, depending on test - Bell will ring STARTING PROCEDURE - Start and Restart at 200 PRINTOUTS - No SWITCH REGISTER OPTIONS - No The code for "TEST 1 - BRANCH" is not terribly exciting. Most of its 8Kb length is filled with these three repeated instructions: 000210: 060100 ADD R1,R0 000212: 000401 BR 000216 000214: 000000 HALT until it reaches this point: 014202: 005267 000022 INC 014230 014206: 001006 BNE 014224 014210: 012737 000207 177566 MOV #207,@#177566 014216: 105737 177564 TSTB @#177564 014222: 100375 BPL 014216 014224: 000167 163750 JMP 000200 014230: 000000 HALT where it increments a zero-initialized word. When the word wraps around to zero again, it will output a BELL character (with bit 7 set; I'm not sure why) to the machine's display terminal, and then run the test again. If a BR instruction fails to branch for some strange reason, then in theory, the machine will fall through to a HALT instruction, and the test will halt. ### Test 13 MAINDEC-11-D0MA (NEW NUMBER - DZKAM) T13 ABSTRACT This is a test of the JSR, RTS and RTI instructions. It is also the first time the Register 6 has been "PUSHED and POPPED". REQUIREMENTS PDP-11 STORAGE - 0 - 5000 LOADING - Absolute Loader EXECUTION TIME - 2 min - Bell will ring STARTING PROCEDURE - Start and Restart at 200 PRINTOUTS - No SWITCH REGISTER OPTIONS - No ### Test 14 Note that, as the instructions indicate, this test will fail on a PDP-11/45 or newer machine, because it expects the MUL instruction to trap. MAINDEC-11-D0NA (NEW NUMBER - DAKAA) T14 TRAPS ABSTRACT This is a test of all operation and instruction that cause traps. Also tested are trap overflow conditions, oddities of register 6, interrupts and the reset instructions. REQUIREMENTS PDP-11/20, 11/05, 11/10 STORAGE - 0 - 17500 LOADING - Absolute Loader EXECUTION TIME - Function or core size - Bell will ring STARTING PROCEDURE Start and Restart at 200 for a 4K System 202 for an 8K System 204 for a 12K System 206 for a 16K System 210 for a 20K System 212 for a 24K System 214 for a 28K System PRINTOUTS - No SWITCH REGISTER OPTIONS - No This program should not be used to test 11/40 and 11/45's. Newer Paper Tape Software (mid-1970s) ------------------------------------- Thanks to the efforts of person(s) unknown, additional paper tape images have been uploaded to [bitsavers.org](http://bitsavers.trailing-edge.com/bits/DEC/pdp11/papertapeimages/). It's not super organized, so for now, I'm just going to pick out selected tapes and archive them here. From [bitsavers.org](http://bitsavers.trailing-edge.com/bits/DEC/pdp11/papertapeimages/20040101/), Tray 02: * Tape 04: [MAINDEC-11-DEQKC-B1-PB 06/12/78; 11/70 cpu instruction; exerciser; (c)1975,76](MAINDEC-11-DEQKC-B1-PB.json)