Dear Worfvx,
Sorry for my late answer, the MC3PHAC is really a preprogrammed HC908MR8 device, I´ve got the CW complete project that assembles (yep, .ASM) flawlessly in CW 6.3 running on my WIN10 64-bit (Tks Rod!). There are lots of information on this like An2202, An2988, DRM006 DRM019. Motorola/Freescale really provided excellent documentation.
Check the top of Motor.s listing:
1 1 ;************************************************************************
2 2 ;* *
3 3 ;* Name: Motor.s *
4 4 ;* Project: MC3PHAC Motor Controller *
5 5 ;* Description: top level file *
6 6 ;* Processor: MC68HC908MRx *
7 7 ;* HW: any *
8 8 ;* Revision: 1.1 *
9 9 ;* Date Created: 12/20/1999 *
10 10 ;* Last Revision 02/03/2004 *
11 11 ;* Compiler: CodeWarrior 2.1 *
12 12 ;* Tab Stops: *
13 13 ;* Author: D. L. Wilson *
14 14 ;* Modified by Hayden Fraser *
15 15 ;* Company: Freescale Semiconductor Inc. *
16 16 ;* =================================================================== *
17 17 ;* Copyright (c): FREESCALE Inc.,2004, All rights reserved. *
18 18 ;* =================================================================== *
19 19 ;************************************************************************
Maybe you could still use this code - or parts of it - with the newer S08.
Cheers,
Celso