Mike's PCjr Page

Some FTP speed tests I've conducted with the Xircom adapter in bidirectional mode on the Pentium III: ftp.apple.com Default buffer size: 46 kB/s 16384: 85 kB/s 32768: 45 kB/s ftp.simtel.com Default buffer size: 78 kB/s 16384: 135 kB/s 32768: 78 kB/s ftp.microsoft.com Default buffer size: 47 kB/s 163...

Netcat speed test results: Jr receiving data: 28 kB/s Jr sending data: 31 kB/s Why then am I getting only 16 kB/s with FTP when downloading a file to the RAM disk? (Note: I now get 18 kB/s if I increase the size of the buffers to 16384.) Is my RAM disk such a slow dog? Could it be slower than yours?...

I now enjoy 58kB/s with the adapter connected to the Pentium III, so the speed limit of 16kB/s doesn't seem to be related to the adapter itself. I will try the netcat speed test. Regarding the bidirectional mode, well, that's what the packet driver says it is using, so... Why would it lie to me? Com...

Mike, I tried your DOS 5.02 boot disk. It works well, but I get the same transfer rate. A few things I've noticed: Using IRQ 7 is a bit faster than using polling (about 1KB/s faster). The script that zeroes 4 bytes for the software interrupt handler is not required. Bidirectional mode is not faster ...

Well, I'm still getting a maximum transfer rate of 16KB/s, and this is using a crossover cable plugged directly into the other computer. In addition, the only disk I/O involved is in writing the received data to the RAM disk, not to the floppy. Speed seems to be slightly slower when I connect Jr to ...

I'd like to have a diskless PCjr. I hate floppy disks. I want to eliminate them all. :twisted: But this is a long-term objective. (I have a few other projects to carry on first.) It appears that DR-DOS and ROM-DOS are embeddable, but the free versions of those DOSes are not. One would need to purcha...

Very interesting with the cooling trick. Beware of the water condensation on the plastic bag, though. You have to keep it dry. You can also use a hairdryer if you need to check that something will start or stop working when heated. If you need the air to be very hot, just clog the air intake a litt...

Well, I'm not too sure about the dropped packets. When FTP exits, it displays two lines of information; the first one begins with "Tcp:" and the second one, with "Packets:". I was reading the "Dropped:" value on the second line, but I suppose I should have read the valu...

Mike, My flakey Xircom adapter is set to bidirectional mode, and I'm getting a transfer rate of about 16 KB/s when downloading a 140 KB file from my local FTP server to my PCjr RAM disk. Should I expect more speed? It is slower than INTERLNK, which doesn't even use the bidirectional mode. Why is tha...

Got 10 adapters, Jon? What for? I guess I should have taken two, after all!

Christian