68300

Rowen,
 
The registers that are used to set up the TPU are at a base offset of $ff fe00.  This is where the module configuration register, the Channel Function Select registers, Host Service Request Registers, etc. are located.
 
The parameter RAM is located at a base offset of $ff ff00 or $7f ff00, depending upon the programming of the MM bit in the Module Configuration Register.
 
I don't know what header file would start at an offset of $a000.  Are you using custom microcode for the TPU or are you using the standard TPU functions?
 
 
 
What may be happening is that the original programmer is using $FF FE00 to tell the program WHERE the registers are located.
 
The file at $A000 may be the actual program that programs the registers located at $FF FE00.
 
This is just a guess.
 
Regards,
 
Charlie

-----Original Message-----
From: Rowen [mailto:sanuriel@...]
Sent: Monday, August 11, 2003 2:29 PM
To: 68300@yahoogroups.com
Subject: [68300] Trouble programming TPU


Hello all,

I'm currently working on a project that involves a MC68332 in which 
I need it to be able to read the length of pulses using its TPU 
lines. However I have a few issues. First of all until this point 
the only assembly I've programmed has been for Intel processors so 
it feels very unfamiliar here. Secondly the device has two header 
files that seem called by a main header file. One says "TpuBase = 
00a000" the other states "tpubase = fffe00" I'm not sure which is 
right, but I know I can't get a program to compile to get this thing 
working...Thanks all

Rowen 



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