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Updated the cx16 library to the ROM's prerelease 36.

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Greg King
2020-01-10 15:17:23 -05:00
parent 244dc358e5
commit b66f7272af
19 changed files with 357 additions and 214 deletions
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8
libsrc/cx16/kbhit.s
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@@ -1,5 +1,5 @@
;
; 2019-12-22, Greg King
; 2020-01-08, Greg King
;
; unsigned char kbhit (void);
; /* Returns non-zero (true) if a typed character is waiting. */
@@ -11,10 +11,10 @@
.proc _kbhit
ldy VIA1::PRA2 ; (KEY_COUNT is in RAM bank 0)
stz VIA1::PRA2
ldy VIA1::PRA ; (KEY_COUNT is in RAM bank 0)
stz VIA1::PRA
lda KEY_COUNT ; Get number of characters
sty VIA1::PRA2
sty VIA1::PRA
tax ; High byte of return (only its zero/nonzero ...
rts ; ... state matters)
.endproc