URL https://opencores.org/ocsvn/eco32/eco32/trunk

Subversion Repositories eco32

[/] [eco32/] [tags/] [eco32-0.23/] [simtest/] [rom/] [rom09.s] - Diff between revs 37 and 157

Rev 37	Rev 157
`;`	`;`
`; rom09.s -- string output with timing loop`	`; rom09.s -- string output with timing loop`
`;`	`;`

`; $8 I/O base address`	`; $8 I/O base address`
`; $9 temporary value`	`; $9 temporary value`
`; $10 character`	`; $10 character`
`; $11 pointer to string`	`; $11 pointer to string`
`; $12 timer base address`	`; $12 timer base address`
`; $13 timer value`	`; $13 timer value`
`; $31 return address`	`; $31 return address`

`.set oba,0xF0300000`	`.set oba,0xF0300000`
`.set tba,0xF0000000`	`.set tba,0xF0000000`

`add $8,$0,oba`	`add $8,$0,oba`
`add $12,$0,tba`	`add $12,$0,tba`
`add $11,$0,hello`	`add $11,$0,hello`
`loop:`	`loop:`
`ldbu $10,$11,0`	`ldbu $10,$11,0`
`stop:`	`stop:`
`beq $10,$0,stop`	`beq $10,$0,stop`
`jal out`	`jal out`
`add $11,$11,1`	`add $11,$11,1`
`jal timing`	`jal timing`
`j loop`	`j loop`

`out:`	`out:`
`stw $10,$8,12`	`stw $10,$8,12`
`jr $31`	`jr $31`

`timing:`	`timing:`
`ldw $13,$12,8`	`ldw $13,$12,8`
`sub $9,$13,0x03C00000`	`sub $9,$13,0x03C00000`
`tim1:`	`tim1:`
`ldw $13,$12,8`	`ldw $13,$12,8`
`bgtu $13,$9,tim1`	`bgtu $13,$9,tim1`
`jr $31`	`jr $31`

`hello:`	`hello:`
`.byte "Hello, world!", 0x0D, 0x0A, 0`	`.byte "Hello, world!", 0x0D, 0x0A, 0`