[wavedrom, ,svg]
....
{reg:[
    { bits:  7, name: 0x73, attr: ['SYSTEM'], type: 8 },
    { bits:  5, name: 'rd', type: 2 },
    { bits:  3, name: 0x4 },
    { bits:  5, name: 'rs1', type: 4 },
    { bits:  2, name: 'n[1:0]' },
    { bits:  4, name: 0x7 },
    { bits:  2, name: 'n[3:2]' },
    { bits:  2, name: 0x0 },
    { bits:  1, name: 'n[4]' },
    { bits:  1, name: 0x1 },
], config: {fontsize: 11}}
....
