*** M E M O R U M ***

It's interesting that the CMOS/NMOS issues we've found were mentioned on that thread too. The MTX plus is CMOS as is one MTX, the other I've reverted back to NMOS for testing. The cards I've been using are, the STEC128mb cards you sent, Kingston 4gb and Integral 2gb. No issues really with any of the...

@martin: I assume you can safely use the chained CTC channels because you've not got to worry about the comms card ? Is there any reason for not just switching to 16MHz at boot - is 8MHz because that's what works reliably or just an example ? Actually the 2nd channel comes from the tape interface, ...

The MTXplus has some very fancy clock controls designed by Tony Brewer. The CPU is booting at 4mhz, but can be switched up to 16mhz in 16 steps. http://primrosebank.net/computers/mtx/projects/mtxplus/firmware/mtxplus_fw_clocks.htm The same system keeps track of VDP writes and automatically inserts Z...

No ram expansions for either of the MTXs here. However that image seem to be working OK on the MTX plus which is configured for 448k. There's a few odd characters, and an "X" appearing on the end of lines. fuzix.jpg I'm wondering if the odd characters are down to scrolling getting out of alignment ?...

These are the boot stings at FFC0 for the various bits of hardware in my collection. Andy's SD card based hardware Rememotech - @REM03 Rememorizor - @REZ03 80C55 based 16 bit IDE CFX - @CFX01 MTXplus - @CFX01 Direct connected 8 bit IDE CFX-II - @CFX02 CFX3 Prototype - @CFX03 All the various CPM syst...

something like a USER EXEC "filename" for CFX/CFX-II looks reasonably doable. Looking at the rom sources .basic LD SP,(SSTACK) XOR A LD (PAGE),A OUT (&00),A LD (PRORPL),A RST &10 ; output routine DB &A3 ; send 3 bytes to the screen DB &1B DS "V" DB &FF DB &6F ; select VS7 and clear DB &A5 ; send 5 b...

I've had fun with this card with my own boot ROMs and it seems to take longer than many to initialize and respond post reset. The propeller boot time adds about a half second extra to the start up time with the CFX-II. It doesn't sound a lot, but because the MTX does almost no boot checks, it notic...

Is the stuff that CP/M does calling via 0xFFF9 documented somewhere. I can see the call ends up loading 0x34 sectors to CE80 but not how you set which sector to start or what happens if you call it multiple times. The FDX technical manual section 1.6 has the basic details of the high memory allocat...

Since CPM doesn't know anything about partitions, on boot it just reads track 0, sector 1 (of 128 bytes) to 0100 and then jumps to 0100 with the stack set to 0200. The silicon disc code looks for C3 01 40 to make sure the image is valid (JP 0140) but the CF code, like the original floppy doesn't. It...

I always used Newword in non document mode for creating assembler files.

It came with the system and is a heck of a lot more friendly than the CPM editor ED.COM.