Mercurial > hg > Members > kono > nitros9-code
view lib/alib/inkey.as @ 3140:03b580a02945
Allow CoCo3FPGA-specific build of superdesc.asm
Added new conditional CC3FPGA and code to "level1/modules/superdesc.asm"
to reflect changes needed to build the new SD card descriptors for the
Coco3FPGA.
author | Bill Pierce <merlinious999@gmail.com> |
---|---|
date | Sat, 04 Feb 2017 11:06:26 +0100 |
parents | 03f26e88b809 |
children |
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*************************************** * Subroutine to input one character from std in. if ready * like an INKEY$... * OTHER MODULES NEEDED: FGETC * ENTRY: none * EXIT: A character, 0=no char * CC carry set if error (from I$Read) * B error code if any nam Inkey ttl Assembler Library Module section .text INKEY: clra std in ldb #SS.Ready os9 I$GetStt see if key ready bcc getit cmpb #E$NotRdy no keys ready=no error bne exit other error, report it clra no error bra exit getit lbsr FGETC go get the key * this inst. needed since ctrl/: sometimes returns a null * usually callers are not expecting a null.... tsta exit rts endsect