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dview.dasm16
dview is CubeOS's windowing system.
Reserves 32 words of memory on the stack for containing screen object locations, the first of which is a pointer to the currently active screen. Screens are added and removed as a "stack."
returns dview memory location
Initializes a new screen mapping for the currently running process, adjusts the dview pointers to work with this new screen, and remaps the screen.
returns the screen location
Closes the latest window for the currently running process, remapping to the one opened before that.
Gets the memory location for the current screen at point (xCoord, yCoord).
modifies A, B
returns literal memory location of that point on the current screen
Copies the null-terminated string from inputPointer to x and y onscreen.
returns the screen location following the written text
Writes ASCII to the current screen using special characters to act as directives (see below.) (This does not perform preprocessing such as translating normal ASCII into those special characters.) Special characters are as follows. returns the screen location following the written text
Substitutes the first nine bits of every word following this with the first nine bits of this word.
syntax 0b ffff bbbb B000 0001, where ffff is the foreground nibble, bbbb is the background nibble, and B is the flashing bit
documentation pending (defaults to tab 4)
syntax 0x ll 09`` where ll` is the number which the new screen location must be divisible by (for alignment)
Jumps to the beginning of the next line, leaving NUL characters, and resumes writing.
Substitutes the value following the directive as either a literal value, represented in ASCII, or a pointer to another ASCII string to be copied literally, obeying past color directives, according to the formatting implied by the leftmost 9 bits.
syntax 0x ff 1a, where ff are the formatting ASCII code
0b0000 0000 m000 0000, where m is the "memory" bit, implying that the next word is a pointer to the actual word to be interpreted
decimal 64 as referring to d; literal
packed string 70 as referring to p; pointer
string 73 as referring to s; pointer
hexidecimal 78 as referring to x; literal
Uses dview.write to write a prompt (from inputPointer) to screenOutputPointer.
returns the screen location following the last user-entered key