The latest development, the PS2XT2SDminiPi. And it works
This is absolutely awesome! Nice work! I haven't had a chance to test the previous version. I've not had enough time recently! :-( Where will you sell them from?
The latest development, the PS2XT2SDminiPi. And it works
hello,Hello,
Sorry for the late reply. Yes, it took me quite some time to get a working Schneider europc 1 so i could test this device.
I can say it just works! I have it connected to the original cable from the HD20.
Hello, i just used the SD card that came with the device. Backed up and not much more. Fdisk and other low level tools other than format won't work.hello,
can yoy describe me ste steps you did,
- what image you wrote in the card (20mb,30mb,40mb)
- how was your lowlevel.hex
- and what you did with fdisk (how many mb)
Thanks
Hi,The latest development, the PS2XT2SDminiPi. And it works. A solid state drive with 112 MB ( type 9 ) for the IBM PS/2 25 or 30 or PS/1 with XT connector.
This version has a Raspberrry Pi Pico instead of the teensy 4.1, which does reduce cost, but also speed .
Reading speed is 1/5 of the teensy 4.1 version, but that is as expexted. The real good feeling of an old slow HDD.
It is not a Pico Problem, the uSD can be read at 3Mb/s in SPI and there is no problem to do the bus interface with no wait state.DiskTest by James Pearce with the latest PS2XT2SD versions does show the following results.
Pi: Reed 76 kB/s teensy: Reed 220 kB/s
Pi: Write 126 kB/s teensy: Write 260 kB/s
with both DMA for Read and Write (PS/2 - PS2XT2SD).
around 300 to 400Kb /sWhat's the approx transfer rates of the original drives?
I could change the SPI speed, so the transfer rate is now 150 kB/s for writing, 220 kB/s for reading for the Pi Pico version, not far away from the Teensy versions speed, which are 220 and 260.Hi,
Is there a way to disable DMA and use PIO for the PS2XT2SD ?
attached picture does show the connectionsI need an assumption check.
So I have a XTA2SD board - which has a 40 pin connector on it.
My Tandy 1110HD has a 44 pin connector.
I purchased a 44 to 40 pin cable that does nothing more than connect pin 1 to pin 1, pin 2 to pin 2, etc. plus gives me a MOLEX connector for power (pins 43 and 44 on the 44 pin side).
My assumption was that this cable should work. Pin 1 on the 44 pin side should be connected to Pin 1 on the 40 pin side.
Is this assumption correct?
NiceI could change the SPI speed, so the transfer rate is now 150 kB/s for writing, 220 kB/s for reading for the Pi Pico version, not far away from the Teensy versions speed, which are 220 and 260.