Also:
. Implement separate B220Version module.
. Correct 220 internal code to ANSI translate table in
B220ControlConsole.js.
. Correct minor typos in comments.
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. Tune internal processor timing to adjust neon glow persistence and
attempt to make the Control Console display more realistic.
2. Change form-feed behavior in ConsolePrinter to embed an ASCII form-
feed character in the text instead of emitting a number of newlines
based upon the current line counter.
3. Corrections to rounding code in experimental version of floatingAdd()
function (not currently enabled in the emulator).
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. Correct scaling and normalization limiter errors in floating Add/Subtract uncovered by BALGOL testing; set Single-Step instead of Stop if normalization limiter is exceeded.
2. Correct improper comparison of sign digits by CFA/CFR uncovered by BALGOL testing.
3. Change method of lamp glow update in Processor and ControlConsole to provide smoother, more realistic display.
4. Implement diagnostic trace facility in Processor; toggle on and off by double-clicking "220" logo on ControlConsole.
5. Implement temporary, experimental floatingAdd() routine in Processor that does rounding for use in BALGOL validity checking (the 220 did not round, and it is disabled in this commit).
6. Correct printer carriage control handling in CardatronOutput.
7. Improve timing for ConsolePrinter TTY "Whippet mode".
8. Implement compression of consecutive duplicate blocks in tape image files for MagTapeDrive -- see comments in source.
9. Remove inappropriate SPO selection from unit designate on PaperTapeReader panel.
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. Rework magnetic tape drive implementation to use Promises; refactor and consolidate drive operation routines.
2. Implement remaining magnetic tape operations: MOW, MOR, MRD, MRR, MTS, MFS, MTC, MFC.
3. Implement better error status reporting in mag tape control MISC register.
4. Implement memory and Processor-state dump by clicking the Burroughs "meatball" logo.
5. Implement preliminary run-time statistics on Console.
6. Use Function.bind() to bind context in Processor and mag tape scripts.
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. Initial Cardatron implementation with CardatronInput (card reader).
2. Implement default Pi demo program at address 0300.
3. Implement WINTER.PI card-load deck to boot from card reader 1 and run at address 0500.
4. Fix syntax typos in tools/BAC-Assembler.html.
1. Rework the partial-word operators for better efficiency.
2. Correct emulated processor clock update during I/O operations.
3. Centralize common I/O initialization and termination code.
4. Correct statistics calculations in schedule().
5. Correct timing for integer and floating divide operators.
6. Correct remainder shifting in floating divide.
7. Implement diagnostic monitor window, opened by double-click on retro-220 logo on home page.
8. Correct timing for ConsolePrinter carriage control functions.
9. Implement simple demo programs pre-loaded into memory.
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.
