(Hauser, 2006)

The P-184 TDC was designed and built by UCLA around 1986.
A BASIC test program was written by Mr. Shi, a C program was written by Slater.
Latest readout program is from Bertrand Biritz, 2005-2006.

Description:
============
CAMAC 8-channel TDC (time-to-digital convertor). 20 ns per count. 
(note, front-panel light stays on until data acquisition running so module is cleared.)

1 negative-going Start pulse,  fast NIM standard
8 negative-going Stop  pulses, fast NIM standard
Bits 1-12 TDC counter.
Bit 12 sets overflow, data readout -1=overflow
Maximum time = 20*(2048-1) ns = 40940 ns
Bits 13-16 are unused.
Bits 17-24 are an ID register, ID=0 0101 0101(binary)=55(hexadecimal)=85(decimal)

Camac functions:
	F0  A0-A7 read TDC channel 1-8 counter
	F2  A0-A7 read TDC channel 1-8 count and CLEAR the module
	F8  Q=LAM
	F10 Q=LAM and CLEAR the module
	F24 disable LAM
	F26 enable LAM
	A8*S1 self-test Start pulse
	A8-S2 self-test Stop  pulse