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https://opencores.org/ocsvn/eco32/eco32/trunk
Subversion Repositories eco32
[/] [eco32/] [trunk/] [simtest/] [rom/] [rom02.s] - Rev 62
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; ; rom02.s -- terminal output, polled ; .set tba,0xF0300000 ; terminal base address add $8,$0,tba ; set terminal base address L1: add $10,$0,'a' ; set char to ASCII 'a' L2: ldw $9,$8,8 ; load transmitter status word into $9 and $9,$9,1 ; extract LSB - 'transmitter ready' beq $9,$0,L2 ; loop while not ready stw $10,$8,12 ; load char into transmitter data register add $10,$10,1 ; next char sub $9,$10,'z'+1 ; check if above 'z' bne $9,$0,L2 ; no - loop j L1 ; else reset to 'a'
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