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Author Topic: ZTEX USB-FPGA Modules 1.15x and 1.15y: 215 and 860 MH/s FPGA Boards  (Read 174230 times)
gr0bi42
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May 04, 2012, 01:15:43 PM
 #681

Another minor issue. While starting cgminer logs:

Code:
...
[2012-05-04 15:05:16] ZTEX 002:009-04A346343E: Frequency change from 1024.00 to 200.00 Mhz
[2012-05-04 15:05:17] ZTEX 002:009-04A346343E: Frequency change from 1024.00 to 200.00 Mhz
[2012-05-04 15:05:18] ZTEX 002:010-04A3476278: Frequency change from 1024.00 to 200.00 Mhz
...

seems that oldfreq isn't proper initialized:

Code:
int libztex_setFreq(struct libztex_device *ztex, uint16_t freq) {
...
        if (oldfreq == -1)
                applog(LOG_WARNING, "%s: Frequency set to %0.2f Mhz",
                       ztex->repr, ztex->freqM1 * (ztex->freqM + 1));


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nelisky
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May 04, 2012, 02:22:29 PM
 #682

Another minor issue. While starting cgminer logs:

Code:
...
[2012-05-04 15:05:16] ZTEX 002:009-04A346343E: Frequency change from 1024.00 to 200.00 Mhz
[2012-05-04 15:05:17] ZTEX 002:009-04A346343E: Frequency change from 1024.00 to 200.00 Mhz
[2012-05-04 15:05:18] ZTEX 002:010-04A3476278: Frequency change from 1024.00 to 200.00 Mhz
...

seems that oldfreq isn't proper initialized:

Code:
int libztex_setFreq(struct libztex_device *ztex, uint16_t freq) {
...
        if (oldfreq == -1)
                applog(LOG_WARNING, "%s: Frequency set to %0.2f Mhz",
                       ztex->repr, ztex->freqM1 * (ztex->freqM + 1));




Yep, I have this one in my todo already. But since it is really a minor annoyance I've been focusing on the more urgent stuff. I'll try to fix that one with the next push.
gr0bi42
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May 04, 2012, 03:32:58 PM
 #683

Any recommendations for USB hub? Need to connect 25 FPGAs.

+1

I'm using this USB-Hub without any problems so far. No need to power the hub.

Belkin Hi-Speed USB 2.0 7-port Hub:
(en) http://www.belkin.com/IWCatProductPage.process?Product_Id=608536
(de) http://www.heise.de/preisvergleich/523198



[edit] image added.

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May 04, 2012, 06:49:01 PM
 #684

I am using this USB hub:
http://www.amazon.com/gp/product/B00483WRZ6/ref=oh_details_o00_s00_i00

MB to 1 master hub then to 10 additional hubs then to the 1.15x

You can get away with just powering the master hub, but the power adapter will get hot if you run a number of boards.
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May 04, 2012, 07:28:08 PM
 #685

Great job Nelisky, works perfectly! I hope, it will be included in the next release of cgminer.
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May 04, 2012, 07:38:46 PM
 #686

did anyone measure the current (A) that take the 1.15x and 1.15y ztex boards ?

treuhand-Dienst gewünscht? - frag per PM an
BTC 174X17nR7vEQBQo4GXKRGMGaTmB49Gf1yT
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May 04, 2012, 07:57:36 PM
 #687

Great job Nelisky, works perfectly! I hope, it will be included in the next release of cgminer.

Thank you Smiley

A Pull Request has been issued to the main cgminer repository so I'm sure it will get included soon.
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May 04, 2012, 10:08:23 PM
 #688



If you can live with the color, it's a $11 10-port hub from dealextreme. No problems so far (4 months). I'm running 3 of them. http://www.dealextreme.com/p/high-speed-usb2-0-1-1-10-port-usb-hub-pink-39715?item=8




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ummas
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May 05, 2012, 03:37:22 PM
 #689

Nelisky
Can i have binarys for ubuntu 11.04?
I`m still unable to compile, and i`m trying once a mounth at least :/
nelisky
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May 05, 2012, 06:08:50 PM
 #690

Nelisky
Can i have binarys for ubuntu 11.04?
I`m still unable to compile, and i`m trying once a mounth at least :/


Wouldn't you rather learn how to correctly compile? Let me know how it is failing for you or give me ssh access to the machine and we can fix that for you.
bulanula
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May 05, 2012, 06:16:58 PM
 #691

Nelisky
Can i have binarys for ubuntu 11.04?
I`m still unable to compile, and i`m trying once a mounth at least :/


Wouldn't you rather learn how to correctly compile? Let me know how it is failing for you or give me ssh access to the machine and we can fix that for you.

Give a man a fish and you feed him for a day. Teach a man how to fish and you feed him for a lifetime.

But people are lazy and want to get the money printer running right away ...
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May 05, 2012, 06:42:29 PM
 #692

But people are lazy and want to get the money printer running right away ...

Not everyone gets overpaid...

ummas
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May 05, 2012, 10:05:04 PM
 #693

My notebook broke down.compiling on my tablet sux :/
I`ll try asap on monday
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May 06, 2012, 04:27:37 PM
 #694

 Grin I was able to bring chip number 3 back to life ! For all those who wondered, the board will work fine if one chip fails. Since the chip was working on arrival I refused Ztex's offer to send the board back for warranty. I was sad but it turned out that the mistake was on my side. It looks like I used a bit too much thermal grease at the wrong place. Somehow, the grease must have found a way to some components on the board or even the pins of the FPGA.

I removed the heatsink, cleaned the FPGA with ethanol and gave it a good spray of WD40. BAAAM, I'm back in business Cool

Code:
New block detected by long polling
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: f=204.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.50%,  hashRate=204.0MH/s,  submitted 14 new nonces,  luckFactor=0.99
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: f=208.00MHz,  errorRate=0.49%,  maxErrorRa
te=1.41%,  hashRate=207.0MH/s,  submitted 10 new nonces,  luckFactor=1.01
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: f=212.00MHz,  errorRate=0.18%,  maxErrorRa
te=2.26%,  hashRate=211.6MH/s,  submitted 19 new nonces,  luckFactor=0.96
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: f=204.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=204.0MH/s,  submitted 14 new nonces,  luckFactor=1.03
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Error: Hash rate drop of 6.0% detect. This
 may be caused by overheating. FPGA is shut down to prevent damage.  50.0: Devic
e disabled since 2012-05-05T19:04:40
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: f=200.00MHz,  errorRate=0.39%,  maxErrorRa
te=0.91%,  hashRate=199.2MH/s,  submitted 15 new nonces,  luckFactor=1.03
bus-0-0: poll loop time: 34ms (USB: 3ms network: 31ms)   getwork time: 136ms  su
bmit time: 218ms
Total hash rate: 1025.8 MH/s
Total submitted hash rate: 1025.5 MH/s
 --------
(Re)Scanning bus ...
MAC address: 0004a32dccc0
ztex_ufm1_15d4-0001-02-05: New device: bitfile=ztex_ufm1_15d4   f_default=200.00
MHz  f_max=240.00MHz  HpC=1.0H
ztex_ufm1_15d4-0001-02-05: FPGA 1: configuration time: 336 ms
ztex_ufm1_15d4-0001-02-05-1: New FPGA
ztex_ufm1_15d4-0001-02-05-1: Set frequency to 200.00MHz
Starting mining thread for bus bus-0-0
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: added
MAC address: 0004a32df1c1
ztex_ufm1_15d4-0001-02-06: New device: bitfile=ztex_ufm1_15d4   f_default=200.00
MHz  f_max=240.00MHz  HpC=1.0H
ztex_ufm1_15d4-0001-02-06: FPGA 1: configuration time: 337 ms
ztex_ufm1_15d4-0001-02-06-1: New FPGA
ztex_ufm1_15d4-0001-02-06-1: Set frequency to 200.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: added
MAC address: 0004a3462b87
ztex_ufm1_15y1-0001-02-07: New device: bitfile=ztex_ufm1_15y1   f_default=200.00
MHz  f_max=240.00MHz  HpC=1.0H
ztex_ufm1_15y1-0001-02-07: FPGA 1: configuration time: 320 ms
ztex_ufm1_15y1-0001-02-07: FPGA 2: configuration time: 317 ms
ztex_ufm1_15y1-0001-02-07: FPGA 3: configuration time: 317 ms
ztex_ufm1_15y1-0001-02-07: FPGA 4: configuration time: 318 ms
ztex_ufm1_15y1-0001-02-07-1: New FPGA
ztex_ufm1_15y1-0001-02-07-1: Set frequency to 200.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: added
ztex_ufm1_15y1-0001-02-07-2: New FPGA
ztex_ufm1_15y1-0001-02-07-2: Set frequency to 200.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: added
ztex_ufm1_15y1-0001-02-07-3: New FPGA
ztex_ufm1_15y1-0001-02-07-3: Set frequency to 200.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: added
ztex_ufm1_15y1-0001-02-07-4: New FPGA
ztex_ufm1_15y1-0001-02-07-4: Set frequency to 200.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: added
3 new devices found.

Summary:
  Bus bus-0-0   : 6 miners
  Total         : 6 miners


Disconnect all devices or enter `q' for exit. Enter `h' for help.

bus-0-0: ztex_ufm1_15y1-0001-02-07-4: Using LongPolling URL http://mint.bitminte
r.com:8332/lp
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: f=200.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=200.0MH/s,  submitted 5 new nonces,  luckFactor=1.79
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: f=200.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=200.0MH/s,  submitted 5 new nonces,  luckFactor=1.79
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: f=200.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=200.0MH/s,  submitted 1 new nonces,  luckFactor=0.36
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: f=200.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=200.0MH/s,  submitted 0 new nonces,  luckFactor=0.00
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: f=200.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=200.0MH/s,  submitted 4 new nonces,  luckFactor=1.44
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: f=200.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=200.0MH/s,  submitted 3 new nonces,  luckFactor=1.08
bus-0-0: poll loop time: 26ms (USB: 4ms network: 22ms)   getwork time: 96ms  sub
mit time: 101ms
Total hash rate: 1200.0 MH/s
Total submitted hash rate: 1288.3 MH/s
 --------
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 216.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: Set frequency to 216.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 216.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: f=208.00MHz,  errorRate=0.79%,  maxErrorRa
te=0.95%,  hashRate=206.4MH/s,  submitted 8 new nonces,  luckFactor=0.76
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: f=208.00MHz,  errorRate=0.35%,  maxErrorRa
te=1.10%,  hashRate=207.3MH/s,  submitted 14 new nonces,  luckFactor=1.10
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: f=212.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=212.0MH/s,  submitted 11 new nonces,  luckFactor=0.68
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: f=208.00MHz,  errorRate=0.77%,  maxErrorRa
te=1.05%,  hashRate=206.4MH/s,  submitted 16 new nonces,  luckFactor=0.93
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: f=212.00MHz,  errorRate=0.67%,  maxErrorRa
te=1.70%,  hashRate=210.6MH/s,  submitted 14 new nonces,  luckFactor=1.02
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: f=204.00MHz,  errorRate=0.93%,  maxErrorRa
te=1.56%,  hashRate=202.1MH/s,  submitted 11 new nonces,  luckFactor=0.83
bus-0-0: poll loop time: 26ms (USB: 5ms network: 21ms)   getwork time: 94ms  sub
mit time: 115ms
Total hash rate: 1244.7 MH/s
Total submitted hash rate: 1097.5 MH/s
 --------
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: Set frequency to 208.00MHz
New block detected by long polling
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: f=208.00MHz,  errorRate=0.14%,  maxErrorRa
te=1.43%,  hashRate=207.7MH/s,  submitted 11 new nonces,  luckFactor=0.76
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: f=208.00MHz,  errorRate=0.01%,  maxErrorRa
te=1.10%,  hashRate=208.0MH/s,  submitted 9 new nonces,  luckFactor=0.88
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: f=212.00MHz,  errorRate=0.07%,  maxErrorRa
te=0.71%,  hashRate=211.9MH/s,  submitted 20 new nonces,  luckFactor=0.99
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: f=208.00MHz,  errorRate=0.08%,  maxErrorRa
te=1.05%,  hashRate=207.8MH/s,  submitted 10 new nonces,  luckFactor=0.82
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: f=208.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=208.0MH/s,  submitted 17 new nonces,  luckFactor=1.10
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: f=204.00MHz,  errorRate=0.38%,  maxErrorRa
te=1.56%,  hashRate=203.2MH/s,  submitted 14 new nonces,  luckFactor=0.90
bus-0-0: poll loop time: 25ms (USB: 5ms network: 20ms)   getwork time: 93ms  sub
mit time: 107ms
Total hash rate: 1246.6 MH/s
Total submitted hash rate: 1125.7 MH/s
 --------
New block detected by long polling
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: f=208.00MHz,  errorRate=0.28%,  maxErrorRa
te=1.43%,  hashRate=207.4MH/s,  submitted 21 new nonces,  luckFactor=0.98
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: f=208.00MHz,  errorRate=0.06%,  maxErrorRa
te=1.10%,  hashRate=207.9MH/s,  submitted 19 new nonces,  luckFactor=1.02
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: f=212.00MHz,  errorRate=0.22%,  maxErrorRa
te=0.71%,  hashRate=211.5MH/s,  submitted 9 new nonces,  luckFactor=0.87
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: f=208.00MHz,  errorRate=0.76%,  maxErrorRa
te=1.71%,  hashRate=206.4MH/s,  submitted 5 new nonces,  luckFactor=0.68
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: f=208.00MHz,  errorRate=0.00%,  maxErrorRa
te=0.00%,  hashRate=208.0MH/s,  submitted 17 new nonces,  luckFactor=1.12
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: f=204.00MHz,  errorRate=1.58%,  maxErrorRa
te=1.93%,  hashRate=200.8MH/s,  submitted 19 new nonces,  luckFactor=1.05
bus-0-0: poll loop time: 25ms (USB: 4ms network: 20ms)   getwork time: 94ms  sub
mit time: 104ms
Total hash rate: 1242.0 MH/s
Total submitted hash rate: 1176.5 MH/s
 --------
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: Set frequency to 216.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 216.00MHz
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d4-0001-02-05-1: f=208.00MHz,  errorRate=0.16%,  maxErrorRa
te=1.43%,  hashRate=207.7MH/s,  submitted 16 new nonces,  luckFactor=1.01
bus-0-0: ztex_ufm1_15d4-0001-02-06-1: f=208.00MHz,  errorRate=0.01%,  maxErrorRa
te=1.10%,  hashRate=208.0MH/s,  submitted 12 new nonces,  luckFactor=0.97
bus-0-0: ztex_ufm1_15y1-0001-02-07-1: f=212.00MHz,  errorRate=0.51%,  maxErrorRa
te=1.13%,  hashRate=210.9MH/s,  submitted 15 new nonces,  luckFactor=0.91
bus-0-0: ztex_ufm1_15y1-0001-02-07-2: f=208.00MHz,  errorRate=0.02%,  maxErrorRa
te=1.71%,  hashRate=208.0MH/s,  submitted 19 new nonces,  luckFactor=0.82
bus-0-0: ztex_ufm1_15y1-0001-02-07-3: f=212.00MHz,  errorRate=2.22%,  maxErrorRa
te=2.22%,  hashRate=207.3MH/s,  submitted 17 new nonces,  luckFactor=1.14
bus-0-0: ztex_ufm1_15y1-0001-02-07-4: f=204.00MHz,  errorRate=1.55%,  maxErrorRa
te=1.93%,  hashRate=200.8MH/s,  submitted 12 new nonces,  luckFactor=1.01
bus-0-0: poll loop time: 25ms (USB: 4ms network: 20ms)   getwork time: 91ms  sub
mit time: 104ms
Total hash rate: 1242.6 MH/s
Total submitted hash rate: 1206.5 MH/s


julz
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May 07, 2012, 01:08:58 AM
 #695

Unfortunately the  1.15y comes in well over the $1000AUD threshold for import to Australia without incurring customs duty and GST.. so I'll be holding off on this until the price for a quad comes down quite a bit.
I'd love to see more motherboard/daughterboard arrangements in FPGA offerings (e.g like the btcfpga quad) so that small scale miners can buy in multiple small-value shipments and build up some gear without paying too high a premium.


@electricwings   BM-GtyD5exuDJ2kvEbr41XchkC8x9hPxdFd
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May 07, 2012, 09:50:22 AM
 #696

did anyone measure the current (A) that take the 1.15x and 1.15y ztex boards ?

The power dissipation for different FPGA boards and with current bitstreams can be found on the BTCMiner homepage At 212MHz it's about 9.5W per LX150 FPGA.

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May 07, 2012, 09:56:50 AM
 #697

I'm using this USB-Hub without any problems so far. No need to power the hub.

USB hubs require some power too. If you use cascades of hubs (i.e. hubs connected to hubs) you should power every second level.

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May 07, 2012, 10:13:19 AM
 #698

Grin I was able to bring chip number 3 back to life ! For all those who wondered, the board will work fine if one chip fails. Since the chip was working on arrival I refused Ztex's offer to send the board back for warranty. I was sad but it turned out that the mistake was on my side. It looks like I used a bit too much thermal grease at the wrong place. Somehow, the grease must have found a way to some components on the board or even the pins of the FPGA.

I removed the heatsink, cleaned the FPGA with ethanol and gave it a good spray of WD40. BAAAM, I'm back in business Cool

Yes, electrically conductive thermal grease should be avoided. It's something I have to add the the red warning slips.

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May 10, 2012, 04:04:39 AM
 #699

nelisky,

How do the bit streams in CGminer work? are they uploaded on startup? Is the path hard coded?
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May 10, 2012, 08:06:38 AM
 #700

nelisky,

How do the bit streams in CGminer work? are they uploaded on startup? Is the path hard coded?

Bitstreams are stored alongside the cgminer binary (directory 'bitstreams'). The path is hard coded but the bitstream selection is defined in each board firmware.

Bitstreams are uploaded at startup, yes.
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