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

Subversion Repositories eco32

[/] [eco32/] [tags/] [eco32-0.22/] [simtest/] [rom/] [rom10.s] - Diff between revs 9 and 21

Rev 9	Rev 21
`;`	`;`
`; rom10.s -- output to console using every possible attribute`	`; rom10.s -- output to console using every possible attribute`
`;`	`;`

`; $8 row number`	`; $8 row number`
`; $9 column number`	`; $9 column number`
`; $10 temporary`	`; $10 temporary`
`; $11 attribute/character`	`; $11 attribute/character`

`.set dsp_base,0xF0100000`	`.set dsp_base,0xF0100000`

`add $8,$0,0 ; start with row = 0`	`add $8,$0,0 ; start with row = 0`
`add $9,$0,0 ; start with col = 0`	`add $9,$0,0 ; start with col = 0`
`add $11,$0,0x0000+'A' ; char is always 'A'`	`add $11,$0,0x0000+'A' ; char is always 'A'`
`next:`	`next:`
`; addr = dsp_base + (row * 128 + column) * 4`	`; addr = dsp_base + (row * 128 + column) * 4`
`sll $10,$8,7`	`sll $10,$8,7`
`add $10,$10,$9`	`add $10,$10,$9`
`sll $10,$10,2`	`sll $10,$10,2`
`stw $11,$10,dsp_base ; write to display memory`	`stw $11,$10,dsp_base ; write to display memory`
`add $11,$11,0x0100 ; next attribute (bits 15:8)`	`add $11,$11,0x0100 ; next attribute (bits 15:8)`
`add $9,$9,1 ; next col`	`add $9,$9,1 ; next col`
`add $10,$0,16`	`add $10,$0,16`
`bne $9,$10,next`	`bne $9,$10,next`
`add $9,$0,0 ; reset col`	`add $9,$0,0 ; reset col`
`add $8,$8,1 ; next row`	`add $8,$8,1 ; next row`
`add $10,$0,16`	`add $10,$0,16`
`bne $8,$10,next`	`bne $8,$10,next`
`stop:`	`stop:`
`j stop`	`j stop`