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Example 1: set trigdeg,(iy+trigflags)
"trigflags" is the byte offset from the start of the flag area (0 in
this case), and "trigdeg" is the Bit # (2 in this case).
In this case is causes the TI-86 to use degrees instead of radians.
Example 2: set textInverse, (iy+textflags)
"textflags" is the byte offset (5 in this case) and "textInverse" is
the bit # (3 in this case)
This causes the system to display white on black instead of the normal
black on white.
Example 3: res textInverse, (iy+textflags)
"textflags" is the byte offset (5 in this case) and "textInverse" is
the bit # (3 in this case)
This causes the system to display the normal black on white again.
| Documented IY offset value | Bit # | Description |
|---|---|---|
| 0 (trigflags) | 2 (trigdeg) | 0 = radians; 1 = degrees |
| 2 (plotflags) & (grfmodeflags) | 1 (plotloc) | 0 = graph writes to display and backup buffer
1 = write to display only |
| 2 (plotdisp) | 0 = graph screen not in display
1 = graph in display |
|
| 4 (grffuncm) | 1 = function graph mode | |
| 5 (grfpolarm) | 1 = polar graph mode | |
| 6 (grfparamm) | 1 = parametric graph mode | |
| 7 (grfrecurm) | 1 = differential equation graph mode | |
| 3 (graphflags) | 0 (graphdraw) | 0 = graph is "clean"; 1 = graph is "dirty" |
| 2 (graphcursor) | 0 = graph cursor is off; 1 = graph cursor on on | |
| 4 (grfdbflags) | 0 (grfdot) | 0 = line mode; 1 = dot mod |
| 1 (grfsimul) | 0 = sequential graph draw; 1 = simultaneous graph draw | |
| 2 (grfgrid) | 0 = no graph grid; 1 = draw grid | |
| 3 (grfpolar) | 0 = show rectangular coordinates
1 = show polar coordinates |
|
| 4 (grfnocoord) | 0 = show graph coordinates
1 = no graph coordinates |
|
| 5 (grfnoaxis) | 0 = draw axis; 1 = no axis | |
| 6 (grflabel) | 0 = no graph labels; 0 = show graph labels | |
| 5 (textflags) | 1 (textEraseBelow) | 1 = erase line below small font write |
| 2 (textScrolled) | 1 = screen scrolled after writing to it | |
| 3 (textInverse) | 1 = write in reverse video | |
| 9 (onflags) | 3 (onRunning) | 1 = calculator is running |
| 4 (onInterrupt) | 1 = [on] key interrupt occurred | |
| 10 (fmtflags) | 0 (fmtExponent) | 1 = exponential display mode |
| 1 (fmtEng) | 1 = engineering display mode | |
| 12 (curflags) | 2 (curAble) | 1 = cursor flash enabled |
| 3 (curOn) | 1 = cursor is showing | |
| 4 (curLock) | 1 = cursor is locked off | |
| 13 (appflags) | 1 (appTextSave) | 1 = save chars written in textshadow |
| 2 (appAutoScroll) | 1 = auto-scroll text on last line | |
| 18 (indicflags) | 0 (indicRun) | 1 = run indicator ON |
| 2 (indicOnly) | 1 = interrupts will only update runindicator tor and not flash the cursor or APD | |
| 3 (shift2nd) | 1=[2nd] has been pressed | |
| 4 (shiftAlpha) | 1=[ALPHA] has been pressed | |
| 5 (shiftLwrAlph) | 1=lower case, 0=upper case | |
| 6 (shiftALock) | 1=alpha lock has been pressed | |
| 24 (newgrfflags) | 6 (textwrite) | 1 = small font writes to graph backup buffer |
| Undocumented IY offset value | Bit # | Description |
|---|---|---|
| 35 (userflags) | 0 (userFont) | ;if set, calc checks for user home screen font |
| 1 (userVfont) | ;if set, calc checks for user variable-width font | |
| 2 (userInt) | ;if set, calc checks for user interrupt routine | |
| 3 (userOn) | ;if set, calc checks for user routine when it turns on | |
| 4 (userLink) | ;if set, calc calls routine when link port triggered? | |
| 7 (userOff) | ;if set, calc calls user routine when it turns off. | |
| 36 (sqrtFlags) | 0 (sqrtPARSEinstalled) | 1 = run this program when specified action occurs |
| 1 (sqrtFORMinstalled) | 1 = run this program when specified action occurs | |
| 2 (sqrtEXECinstalled) | 1 = run this program when specified action occurs | |
| 3 (sqrtEXPRinstalled) | 1 = run this program when specified action occurs | |
| 4 (sqrtHOMEinstalled) | 1 = run this program when specified action occurs | |
| 5 (sqrtCMDTOKinstalled) | 1 = run this program when specified action occurs | |
| 6 (sqrtKEYinstalled) | 1 = run this program when specified action occurs | |
| 7 (sqrtGRFinstalled) | 1 = run this program when specified action occurs |
More information will be available on the undocumented flags when I learn more about it.