Digital Electronics and Software Projects

MiniMAX-40 Processor Module

MiniMAX-40 is a single board credit card size microcomputer which employs the V40HL from NEC and a Xilinx XC3020, XC3030 or XC3042 LCA. It has 32-512kB battery backed SRAM and 128-512kB Flash EPROM on board. Also a real-time clock and a "silicon serial number" are implemented.

Here are the miniMAX-40 schematics as a zipped PDF-File (75kB):

EMU-40 is the development tool for miniMAX-40 ("emulator"). It is plugged between miniMAX-40 and the target hardware. EMU-40 downloads programs from a PC, test-runs them on miniMAX-40 and optionally programs the Flash-EEPROM on miniMAX-40. The RS-232 communication with a PC can run at up to 115kBd and it is optically insulated for safety reasons.

Here are the schematics of EMU-40 as a zipped PDF-File (101kB):

miniMAX-40 and EMU-40 have been described in a series of articles for the German electronics magazine ELRAD (Michael Krämer, Im Gleichklang, ELRAD 1996, Heft 2, 3 und 5).

Software

For the miniMAX-project I have written two software packages, which could be of interest for other projects as well. UniLoc is a locator tool and UniMOS is a real time and/or time sliced operating system kernel.

UniLoc V2.3

Download

UniLoc isfreeware
UniLoc creates Intel-Hex or Motorola S-record output files from .EXE input files
UniLoc relocates relative segments/groups to any absolute location within the address space
DOS and OS/2 version included
Adapted startup code for Borland C/C++ 3.1 included

178 kB

UniMos

Download

Multitasking kernel for 8088/188 compatible processors
Event driven or time sliced algorithm
System size is only limited by available memory
High speed by coding in assembler
Timeouts for all system functions that can wait for events
Fully functional demo version which can also run under DOS
Source files available here
UniMos is freeware for private and commercial purposes. No warranty, (maybe) no support!

Demo: 114 kB

PDF Doc: 449 kB

(German only)