Re: [M100] speed benchmark!

On Mon, Apr 27, 2020 at 5:16 PM Stephen Adolph wrote: > Interesting. > So I have some data now for TPDD transfer @76800, 38400 and 19200. > 32kb transfer from PC to M100 (actually writing to ram sequentially) > 76800 == 9 sec > 38400 == 14 sec > 19200 == 23 sec > > strange though, I have my 56800

Re: [M100] speed benchmark!

Interesting. So I have some data now for TPDD transfer @76800, 38400 and 19200. 32kb transfer from PC to M100 (actually writing to ram sequentially) 76800 == 9 sec 38400 == 14 sec 19200 == 23 sec strange though, I have my 56800 result @ 7 sec. weird. Unless my code is very inefficient, it seems

Re: [M100] speed benchmark!

yep I'm caught up on that now. I've been using Linux in the "lab" for a while now; I can't seem to identify how to enable a custom baud on the FTDI device in a linux box. But I have got my new dongle working at 76800 in Windows. On Sun, Apr 26, 2020 at 2:23 PM John R. Hogerhuis wrote: > > > On

Re: [M100] speed benchmark!

I did not have to do anything special to get the FTDI to support 76800. No special driver or tweaks. TBACK just opens the port with the rate set to 76800. That's all. Yes tback supports loading the backed up image. It still polls the port directly but uses hardware flow control to keep from bein

Re: [M100] speed benchmark!

On Sun, Apr 26, 2020, 2:39 AM Stephen Adolph wrote: > John what are you connecting to at 76800? I dont think I have anything > other than an m100. > > FTDI USB-serial dongle. PC running Windows. TBACK is a Win32 application using the Win32 API directly. Though it might work in .net too I thi

Re: [M100] speed benchmark!

hen Adolph >> *To:* m...@bitchin100.com >> *Sent:* Sunday, April 26, 2020 11:32 AM >> *Subject:* Re: [M100] speed benchmark! >> >> no as I have said, bit banging the BCR port is limited to 57600. so it >> makes sense to use 76800 and a suitable usb RS232 port

Re: [M100] speed benchmark!

video at 57600 and RS-232 at 76800 for data transfer? > > - Original Message - > *From:* Stephen Adolph > *To:* m...@bitchin100.com > *Sent:* Sunday, April 26, 2020 11:32 AM > *Subject:* Re: [M100] speed benchmark! > > no as I have said, bit banging the BCR port is limite

Re: [M100] speed benchmark!

So, BCR port for video at 57600 and RS-232 at 76800 for data transfer? - Original Message - From: Stephen Adolph To: m...@bitchin100.com Sent: Sunday, April 26, 2020 11:32 AM Subject: Re: [M100] speed benchmark! no as I have said, bit banging the BCR port is limited to

Re: [M100] speed benchmark!

of the main points after all. > > - Original Message - > *From:* Stephen Adolph > *To:* m...@bitchin100.com > *Sent:* Sunday, April 26, 2020 9:03 AM > *Subject:* Re: [M100] speed benchmark! > > I'm going to take back this comment: " I myself have passed c

Re: [M100] speed benchmark!

No problem using the RS-232 port at 76800 but can you bit bang the BCR port at that speed? That was one of the main points after all. - Original Message - From: Stephen Adolph To: m...@bitchin100.com Sent: Sunday, April 26, 2020 9:03 AM Subject: Re: [M100] speed benchmark

Re: [M100] speed benchmark!

I'm going to take back this comment: " I myself have passed characters between two m100 at 76800 by manually coding, but It was flakey because of how you have to set up the UART." For some reason I thought I recalled that the UART stopped using 16x clock for RX sampling at 76800. Wrong! It alwa

Re: [M100] speed benchmark!

John, have you ever tried the reverse path? What about from PC to TBACK/M100 for transfer IN to the M100? On Sun, Apr 26, 2020 at 2:23 AM John R. Hogerhuis wrote: > > > On Sat, Apr 25, 2020 at 7:25 PM Stephen Adolph > wrote: > >> Still playing around with the BCR TTL serial port. >> ...yes it

Re: [M100] speed benchmark!

lots of design choices Brian REXCPM is SRAM not Flash. SDcards can't be used as system memory. convenient connection to M100 is a big factor. power consumption is another. a project I am willing to take on is another ;) Anyhow I think there are a couple of scenarios 1) user has a PC with an FTDI

Re: [M100] speed benchmark!

Yah thats a better way to go for sure. Will order one and see. On Sunday, April 26, 2020, Ken Pettit wrote: > Hey Steve, > > Any FTDI FT232R or FT2232 based dongle can do it. > > https://www.ftdichip.com/Support/Documents/AppNotes/ > AN232B-05_BaudRates.pdf > > t's a matter of how do you get

Re: [M100] speed benchmark!

Hey Steve, Any FTDI FT232R or FT2232 based dongle can do it. AN232B-05 Configuring FT232R, FT2232 and FT232B Baud Rates https://www.ftdichip.com/Support/Documents/AppNotes/AN232B-05_BaudRates.pdf t's a matter of how do you get the custom rate programmed in Windows. I haven't used Windows fo

Re: [M100] speed benchmark!

Ah, I see. Which I dont have. Clearly I should get one. What is an example of one that is worth owning? I recall having one that was useless so I gave up on usb serial. On Sunday, April 26, 2020, Stephen Adolph wrote: > Standard pc ports dont support 76800 do they? > > On Sunday, April 26,

Re: [M100] speed benchmark!

I don't think so, but then PC's don't come standard with a serial port any longer. :) At least none that I know of. Ken On 4/26/20 2:45 AM, Stephen Adolph wrote: Standard pc ports dont support 76800 do they? On Sunday, April 26, 2020, Stephen Adolph > wrote:

Re: [M100] speed benchmark!

Standard pc ports dont support 76800 do they? On Sunday, April 26, 2020, Stephen Adolph wrote: > I know that Ken, Nothing else can though? > > > On Sunday, April 26, 2020, Ken Pettit wrote: > >> Hey Steve, >> >> M100 can run at 76800 on it's UART. >> >> Ken >> >> On 4/26/20 2:39 AM, Stephen Ado

Re: [M100] speed benchmark!

Some USB UART dongles can. Some of them are very finely programmable with any arbitrary frequency (within a range of course). Ken On 4/26/20 2:43 AM, Stephen Adolph wrote: I know that Ken, Nothing else can though? On Sunday, April 26, 2020, Ken Pettit > wrote:

Re: [M100] speed benchmark!

I know that Ken, Nothing else can though? On Sunday, April 26, 2020, Ken Pettit wrote: > Hey Steve, > > M100 can run at 76800 on it's UART. > > Ken > > On 4/26/20 2:39 AM, Stephen Adolph wrote: > > John what are you connecting to at 76800? I dont think I have anything > other than an m100. >

Re: [M100] speed benchmark!

Hey Steve, M100 can run at 76800 on it's UART. Ken On 4/26/20 2:39 AM, Stephen Adolph wrote: John what are you connecting to at 76800? I dont think I have anything other than an m100. On Sunday, April 26, 2020, John R. Hogerhuis > wrote: On Sat, Apr 25, 20

Re: [M100] speed benchmark!

John what are you connecting to at 76800? I dont think I have anything other than an m100. On Sunday, April 26, 2020, John R. Hogerhuis wrote: > > > On Sat, Apr 25, 2020 at 7:25 PM Stephen Adolph > wrote: > >> Still playing around with the BCR TTL serial port. >> ...yes it has it's limitatio

Re: [M100] speed benchmark!

Yeah, I wouldn’t want to write a soft UART if I could avoid it. :) Thanks for the info! On Sat, Apr 25, 2020 at 7:47 PM Stephen Adolph wrote: > Model 100 UART is able to clock at 9600 19200 38400 and in fact also 76800. > Model 100 is very hard pressed to use the existing rom routnes to utilize

Re: [M100] speed benchmark!

On Sat, Apr 25, 2020 at 7:25 PM Stephen Adolph wrote: > Still playing around with the BCR TTL serial port. > ...yes it has it's limitations... half duplex, no flow control, bit-banged > > ..but it is fast! Today I was able to get 32kB transferred in 7 seconds. > That's pretty close to 100% utili

Re: [M100] speed benchmark!

On 4/25/20 10:25 PM, Stephen Adolph wrote: Still playing around with the BCR TTL serial port. ...yes it has it's limitations... half duplex, no flow control, bit-banged ..but it is fast!  Today I was able to get 32kB transferred in 7 seconds.  That's pretty close to 100% utilization on the 5760

Re: [M100] speed benchmark!

Model 100 UART is able to clock at 9600 19200 38400 and in fact also 76800. Model 100 is very hard pressed to use the existing rom routnes to utilize 38400. There's just a lot to do to process input bytes using the circular buffer etc. I myself have passed characters between two m100 at 76800 by

Re: [M100] speed benchmark!

I’m curious... why is this faster than the UART feeding the real serial port? Bit banged I/O should always be 1/10 the speed of a UART, unless the UART is broken or something. On Sat, Apr 25, 2020 at 7:25 PM Stephen Adolph wrote: > Still playing around with the BCR TTL serial port. > ...yes it h

[M100] speed benchmark!

Still playing around with the BCR TTL serial port. ...yes it has it's limitations... half duplex, no flow control, bit-banged ..but it is fast! Today I was able to get 32kB transferred in 7 seconds. That's pretty close to 100% utilization on the 57600 baud line. I think that is a new M100 record