|Title:||Merge scanswitch and pidp8i-test|
|Last Modified:||2017-02-03 15:00:58|
|Version Found In:|
tangent added on 2016-11-30 20:03:54:
These two programs do much the same sort of thing, only with different outputs. One returns the value of a particular switch as an exit code, while the other displays the switch outputs on the console. Since there are plans afoot to add operating modes to pidp8i-test to make it skip certain tests, why not also add one that makes it check the switches that scanswitch does and exit the same way? That way a single core can be used both interactively and in scripts.
tangent added on 2017-01-21 08:11:20: (text/x-fossil-plain)
exec() this test from the simulator when SING_STEP + SING_INST + EXAM is given, mnemonic "examine," as in "test". Accept SING_STEP + SING_INST + CONT to re-exec pidp8i-sim from pidp8i-test, mnemonic "continue with simulation." It needs to be a different combo anyway, because the Pi can probably launch and start pidp8i-test before the user releases the EXAM switch.
tangent added on 2017-01-21 08:49:54: (text/x-fossil-plain)
Proposed command line switch additions: -s N Read the state of switch N, which can either be an index from the left edge of the panel or a switch name (e.g. -s SR3) -S Enter a loop displaying the current switch states on stdout -c N Turn on all LEDs in column N, numbered from 0 at left edge of panel -r N Ditto, but for rows from the top -l X,Y Turn on LED at column X, row Y -a Turn on all LEDs -q Run silently. Given with -s, indicates switch state as an exit status. -p N Display pattern #N (see next comment) -P Select pattern from DF switches The -c, -r and -l options can be given multiple times, and they add together. So, you could draw a box with a dot in the middle with "-c 6 -c 19 -r 0 -r 4 -l 8,2". (Columns 0 thru 5 are for STEP, IF, DF, and LINK, 6-19 are for the bulk of the registers, and 20-22 are for the instruction decoding and processor mode lights.) Given all of this, we can replace the current timed test with a shell script, perhaps called `pidp8i-autotest`: #!/bin/sh tprg=@prefix@/bin/pidp8i-test echo Lighting up all LEDs... $tprg -a sleep 5 for r in seq 0 4 ; do echo Lighting up row $r LEDs... $tprg -r $r sleep 5 done for c in seq 0 22 ; do echo Lighting up column $c LEDs... $tprg -c $c sleep 5 done echo "Reading the switches. Toggle any pattern desired. CTRL-C to quit." $tprg -S
tangent added on 2017-01-21 09:28:43: (text/x-fossil-plain)
-P mode above makes the program work something like Deeper Thought, but with our own demo modes, not taken from the existing code. Proposal: DF switches select first 8 -p patterns, which are set with PDP-8/I sense, 0 = up, not down: 000 = semi-random display, with system time selecting interactive, batch, and idle mix 001 = bouncing ball (mnemonic: 1 LED on: the ball) 010 = text scroller (no mnemonic) 011 = snake (mnemonic: 3 LEDs on, default snake length) 100 = binary clock (mnemonic: 1 o'clock) 101 = like pidp8i-autotest, but controlled with IF and SR (mnemonic: 101 is "basics") 110 = Larson scanner (mnemonic: Cylon Number 6) 111 = all LEDs on (mnemonic: all DF bits on) Other patterns can be added with -p N where N > 7, run from the command line instead of via -P and set with DF. Speed is set with IF switches, not SR. IF=0 is "very fast," IF=7 is "very slow." Delays are set per DF mode, since the definition of "fast" may differ for different displays. SR controls per-demo modes: 000 = randomness mix 001 = bounce angle 010 = select message from a 4096=line catalog, like fortune(1) 011 = length of snake 100 = bottom 5 bits of SR add hours to TZ, so 00111 would push MST to UTC upper 7 bits do...TBD 101 = SR != 0 stops iteration and lights columns corresponding to SR settings 110 = first 2 SR switches control height of LED blob (1, 3 or 5 rows) next 4 control width (SR2 selects multiply or divide, next 3 give 1-8x factor) remaining 6 control TBD; inverse mode? 111 = seed for turning off a random subset of the LEDs; "some LEDs on" Obey the same shutdown and reboot SING_STEP commands as the simulator.
tangent added on 2017-02-03 15:00:58: (text/x-fossil-plain)
Maybe rename the combined program to something like `pidp8i-fp`, with special-case modes selected when argv == "pidp8i-test", which can be installed as a hard link. Don't bother for "scanswitch", since that's an internal program.