Re: [M100] PDD Firmware Reverse Engineering - Progress

On Wed, Aug 9, 2017 at 1:49 PM, wrote: > Yes, you're right. I just took a quick look at the T200 schematic and saw > few gates sitting at the RS232 connector, I didn't notice the VEE at the > bottom (plus the image is very pixelated too). > > Well, also the TPDD cable itself

Re: [M100] PDD Firmware Reverse Engineering - Progress

. m - Original Message - From: <biggran...@tds.net> To: <m...@bitchin100.com> Sent: Wednesday, August 09, 2017 1:52 PM Subject: Re: [M100] PDD Firmware Reverse Engineering - Progress There should be a little difference in speed, the data to and from the disk in

Re: [M100] PDD Firmware Reverse Engineering - Progress

the 'special cable' takes care of the necessary translation. m - Original Message - From: <biggran...@tds.net> To: <m...@bitchin100.com> Sent: Wednesday, August 09, 2017 1:52 PM Subject: Re: [M100] PDD Firmware Reverse Engineering - Progress > There should be a little diff

Re: [M100] PDD Firmware Reverse Engineering - Progress

There should be a little difference in speed, the data to and from the disk in not streamed, it is buffered in RAM in chunks on the drive controller board and then transferred to disk (or back to serial). And everything is done asynchronously. I'm sure 19200 was chosen for robustness though,

Re: [M100] PDD Firmware Reverse Engineering - Progress

Interesting! I wonder if it can actually do 76800bps since it's in their baud rate table. I've found that's the top speed of the model 100. I don't think the t200 can reach it though. I think the t200 will function at 38400 but I don't remember for sure. Not that it matters too much. It's a disk

Re: [M100] PDD Firmware Reverse Engineering - Progress

Love your work! I do have a TPPD2 here, but not the time to look at it. All my hobbies have fallen by the wayside at the moment. :-/ On Tue, 8 Aug 2017 22:48:04 -0400, biggran...@tds.net wrote: For those who are interested... Getting a copy of the PDD1 Software Manual really helped out with