. Adjust (hopefully for the last time) the RGB code for the 220
Sundland Beige panel color: it's now #C5B1A0. This has been a really
difficult color to pin down.
. Implement Clear Memory button on Console; implement "hover captions"
for the Clear Memory and Load Card buttons.
. Implement current block-number display on magnetic tape panel.
. Implement "word index" counter on the B220MagTapeDrive panel to
indicate the tape position in terms of 11-digit 220 words.
. Implement Rewind and Unload buttons on the paper-tape reader.
. Implement "word index" counter on the B220PaperTapeReader panel.
. When a Cardatron or paper-tape reader encounters a sign=6 control
word, do not reschedule the Processor if it has been halted.
. Correct handling of reload-lockout in B220CardatronInput; change
method of reporting Cardatron end-of-I/O signal to the Processor.
. Correct this.pendingFinish timing race in B220CardatronOutput.
. Correct validation when loading tape images in B220MagTapeDrive so
that the drive will continue to be usable after an invalid image is
detected.
. Correct logic for spacing and searching magnetic tape blocks
backwards.
. Correct output of non-printing characters in B220PaperTapePunch.
. Correct handling of invalid tape image characters in
B220PaperTapeReader.
. Implement additional tracing for paper-tape and magnetic tape I/Os
(currently disabled).
1. Correct 220-Paper-Tape-Decoder.html to support the full 64-character
paper tape encoding.
2. Correct BAC-Disassembler.html to support the full 64-character set
and properly output sign-2 constant words.
3. Correct the Processor and Paper Tape drivers to support the full
64-character set and allow literal error codes (17) to be read without
setting the paper-tape alarm.
4. Commit the TR1101 and TR1301 diagnostic test paper tape images
received from Al Kossow at
http://bitsavers.org/bits/Burroughs/B220/TR1101_TR1301.zip.
1. Redesign and correct implementation of the "normalization limiter
digit" in floating add/subtract.
2. Correct final value of A register when floating-overflow occurs in
floating multiply.
3. Correct final value of A register when D register is not normalized
for floating divide.
4. Correct register setup and post-divide normalization for floating
divide.
5. Implement double-click handler on Cardatron reader and printer
background panel areas to temporarily toggle their speeds by 1000
cards/lines per minute. This is intended only for testing, not for
regular use.
6. Implement double-click handler on Console Burroughs logo to toggle
lamp intensity averaging on and off temporarily.
7. Implement validation of magnetic tape image files during loading;
reject image files that do not pass.
8. Minor changes to comments and cosmetics for multiple other scripts.
1. Rework Processor internal timing and throttling mechanism during I/O.
2. Revise Console statistics display, add instruction counter.
3. Correct (again) CFA/CFR instruction when sign is included in field.
4. Correct B-register modification of words during Cardatron and
magnetic tape input.
5. Clear Processor alarms on Reset/Transfer.
6. Add links to wiki on index and home pages.
7. Eliminate B220Util CSS class functions in favor of DOM classList
methods.
8. Attempt to reproduce "Sundland Beige" color for the panels.
9. Correct formatting of tab stops for B220ConsolePrinter.
10. Reduce Whippet printer speed from 5000 to 1000 cps.
11. Reduce Console update frequency from every 50 to 100 ms; increase
lamp glow update factor from 0.25 to 0.75.
12. Allow click of white button below console register lamps in addition
to clicking the lamps themselves to toggle the lamp state.
13. Rework the way that white vertical bars are drawn on registers.
14. Allow B220PaperTapeReader to properly send sign-2 alphanumeric words
with trailing spaces if the tape image file has been space-trimmed on
the right.
15. Clear the paper tape reader view window when loading new tapes.
16. Revise yet again the setCallback() delay deviation adjustment
algorithm.
1. Implement centralized pop-up window opening mechanism to enforce a delay between pop-up opens. This is to satisfy new restrictions on multiple pop-ups imposed by the Apple Safari 11.0 browser.
2. Correct Reload-Lockout behavior and format band 6 initialization in B220CardatronInput.
3. Correct translation of sign digits and skip-to-channel behavior in B220CardatronOutput.
4. Strip sign digit from search/scan argument word when storing into B220MagTapeControl T register.
5. Remove option for 1000-word system memory size and correct handling of memory size list selection in B220SystemConfig.
6. Change reel-to-reel magnetic tape name from DataReader to TSU in B220SystemConfig.
1. Remove Application Cache mechanism (has been deprecated as a web standard).
2. Replace internal bindMethod() utility function with standard Javascript object.bind().
3. Automatically reset Digit Check Alarm when bits are corrected in registers.
4. Correct setting of Overflow Toggle in IFL.
5. Terminate magnetic tape data transfer if AST toggle gets reset.
6. Correct way Processor was released by magnetic tape TCU.
7. Correct construction of preface word in memory for mag tape MRR.
8. Correct determination of mag tape "remote" status to allow tape to be unloaded immediately after a rewind.
9. Fix bug in BCS detecting the switch setting.
10. Modify behavior of Reset/Transfer switch to allow recovery after a tape malfunction.
11. Correct formatting of HIGH lamp on Control Console.
12. Remove extraneous whitespace from B220FramePaper sub-window markup.
1. Minor improvements to magnetic tape implementation and rearrangement of code.
2. Correct Processor CAD/CAA/CSU/CSA operation for operand signs other than 0 or 1.
3. Correct Processor LDB to load only the low-order four digits of the operand into B.
4. Correct Processor SLS shift count; improve mechanization of other shift-left operations.
5. Fix beforeunload event registration for Cardatron and Console devices.
6. Implement "Whippet" mode for Console TTY devices to print at 200 CPS instead of 10 CPS.
7. Expand B220PaperTapePunch translate table to cover all 256 8-bit codes; scroll end of punched data into view.
8. Minor code cleanup in B220PaperTapeReader.
1. Commit initial (incomplete) implementation of magnetic tape drives (TSU) and control: MLS, MRW, MDA, MIW, MIR, MPF, MPB, MPE, MIB, MIE.
2. Change B220SetCallback.js "setImmediate" mechanism to use DOM Promises instead of window.postMessage().
3. Minor styling and window positioning changes.
1. Implementation Paper Tape Reader devices and op codes.
2. Commit standard and inverse-format paper tape loaders for WINTER.PI program.
3. Fix positioning of Cardatron and TTY/Paper Tape Punch device windows.
1. Implement console teletype printer and paper tape punch devices.
2. Correct timing mechanism and operation complete processing for asynchronous (I/O) processor mode.
3. Delete extraneous alarm toggles from B220Processor.
4. Correct Reset And Transfer switch so it will work when the Processor is running.
5. Implement Hello World default program for SPO at address 0020.
6. Change keyboard keystroke assignments for B220ConsoleKeyboard.
7. Implement Reset-to-Defaults feature for B220SystemConfig.
8. Implement DOM Element.classList for B220Util class attribute manipulation.
9. Minor typo correction to BALGOL-Generator.bacg.
