after hard reset/fiddling with keys, then shift-break

[mattgodbolt]

Uncaught TypeError: Cannot read properties of undefined (reading 'notFoundTask')
at e.read.e.write.e.address.e.format (fdc.js:27:22)
at Zc.callback (fdc.js:587:48)
at Ic.onExpire (fdc.js:242:18)
at Pc.polltime (scheduler.js:67:14)
at Gc.polltimeFast (6502.js:1047:24)
at Uc.t.branch (6502.js:156:17)
at r.eval (eval at (6502.opcodes.js:1162:29), :6:7)
at r.run (6502.opcodes.js:1165:34)
at Gc.executeInternalFast (6502.js:1106:25)
at Gc.execute (6502.js:1077:25)