##  $Id: README,v 1.2 1997/03/11 15:42:57 joel Exp $#Description: efi68k============CPU: MC68HC000 @16MHzRAM: 256kROM: 256k   Based upon a 16MHz 68HC000, efi332 is a minimally configured 4x6inch single board computer. It includes the following majorcomponents: (a) 256k SRAM (km681000l), (b) 256 EPROM (27C010), (c) DP8570A (clock/timer/calendar), (d) MAX791 (cpu supervisory chipwith battery backup switch-over and watch dog timer), and (e) NS16550DN (UART). The following interrupt functions have also beenincorporated: UART, TIMER, Watch Dog, and Low Line voltage (trips at4.85V; enough time to save the cpu reg before reset is asserted onpower down).   The schematic for efi68k is freely available via e-mail. Send"index diy_efi" to majordomo@coulomb.eng.ohio-state.edu. Retrieve thefiles related to 68hc000-1.00 with the "get diy_efi <filename>"command. efi68k does not have an available printed circuit board, butcan be wire-wrapped in about four days. Cost is about $100US.TODO:=====- add the "tm27 vector" ... can we use a trap instruction?- generate include/coverhd.c to perform the tmtest.- the interrupt drive I/O should be integrated into the RTEMS.- finish the ROM memory model.- add separate interrupt stack (low priority).                                       John S Gwynne                                          Gwynne.1@osu.edu_______________________________________________________________________________               T h e   O h i o - S t a t e   U n i v e r s i t y    ElectroScience Laboratory, 1320 Kinnear Road, Columbus, Ohio 43212, USA                Telephone: (614) 292-7981 * Fax: (614) 292-7297-------------------------------------------------------------------------------