




               MVSEX REV B TECHNICAL SPECIFICATIONS 




1.0 INTRODUCTION
----------------

Basic MVSEX1 features:

 - 128Kbyte CMOS SRAM               - 128Kbyte FLASH solid state disk
 - Uninterruptable Power Supply     - 8 bit A-to-D converter (2 chan RC)
 - 5 serial ports (8250,SUART,SYNC) - 3 parallel w/ctl (35 bits max)
 - Battery backed Calendar/Clock    - Built-in LED display
 - Keyboard input                   - LCD interface
 - Memory expandable to 64mbyte     - Industry standard PC bus
 - 2 DMA channels (8237)            - 15 IRQs (8259)  
 - 3 hardware timers (8253)         - BIOS with serial program download

The MVSEX2 adds the following features:

 - 512Kbyte CMOS SRAM               - 256Kbyte FLASH solid state disk
 - On-board 3 voltage Power Supply  - Socket for up to 8meg EPROM (27080)
 - Power down mode (100ua)          - All CMOS (20ma OPERATING current)
 - ISA/104 bus (sdrv,mtrm,ccc)      - 12bit 4chan 200khz ADC

The MVSEX 80386 single board computer is a direct upgrade to the MVSBC
product line.  Most of the tools and documentation developed for the 8088
cards are applicable to the 386.  Since the MVSEX is virtually identical to
the chip set of a standard PC motherboard, development is very straight
forward with minimal learning curve.

Options:

   - 128k, 256k, 512k, and 1mbyte on-board FLASH solid state disks
   - 128k, 512k, and 1mbyte on-board CMOS SRAM
   - Development kit with BIOS source, parallel download, Borland C, tutorial
   - 8/12/16 bit high speed A-to-D and D-to-A converters
   - TRIAC, optoisolator, and relay cards
   - Numeric and alphnumeric keypads
   - Alphanumeric and graphic panel LCD displays
   - Miniature thermal printer
   - Temperature and tach sensors
   - Power supplies and chassis kits
   - Ribbon cable and circuit board type backplanes
   - Modem and sound card development kits

Three levels of programming capability:

    method     code  data    software    tools

1. COM file    <64k  <1mb      easy     compilers like Turbo C, no DOS needed
2. EXE file    <1mb  <1mb    moderate   DOS and/or locate utility required
3. Protected   <64mb <64mb   advanced   32 bit operating system and compiler



2.0 SPECIFICATIONS
------------------

Size: 3.2" x 4.5" x .5"
Temperature: -65 to 110 degrees C
Relative Humidity: 0 to 95 percent non-condensing
Vibration: 10 to 60 hz 2mm p-p
CPU Oscillator: 50mhz


         

3.0 I/O CONNECTOR PINOUT
------------------------

pin bit function    dir       pin bit function    dir

 1  4.7 Port4 Bit 7  o         2  4.6 Port4 Bit 6  o 
 3  4.5 Port4 Bit 5  o         4  4.4 Port4 Bit 4  o
 5  4.3 Port4 Bit 3  o         6  4.2 Port4 Bit 2  o
 7  4.1 Port4 Bit 1  o         8  4.0 Port4 Bit 0  o
 9      Reset hi     i        10      Ground        
11      WDTOUT       o        12      BAT+          
13      SMIACTL      o        14      SMIL         i
15      COM5 RxD     i        16      VCC2          
17      IRQ14        i        18      IRQ13        i
19      TMRGAT2      i        20      TMRCLK2      i
21      TMROUT2      o        22      +5v           
23  2.1 FLASH Strobe b        24  1.3 COM3 Rx      r
25      AIN0                  26      AIN1          
27      COM2 Rx(Rx1) r        28  2.7 COM4 Rx      r
29  2.5 COM1 Rx(Rx0) r        30      polarizing key
31  2.0 LPT1 Busy    b        32  1.5 KbdClk       b
33      KbdDat/DSR1L b        34      Ground        
35  3.7 Port3 Bit 7  b        36      +12v          
37  3.6 Port3 Bit 6  b        38      -12v          
39  3.5 Port3 Bit 5  b        40      Ground        
41  3.4 Port3 Bit 4  b        42      +5v           
43  3.3 Port3 Bit 3  b        44  2.3 LPT2 Busy    b
45  3.2 Port3 Bit 2  b        46      Reset lo     b
47  3.1 Port3 Bit 1  b        48  2.4 LPT2 Strobe  b
49  3.0 Port3 Bit 0  b        50  1.4 LCD Strobe   b
51  1.0 LPT1 Strobe  b        52  1.7 RTC Strobe   b
53      COM5 TxD     o        54  1.6 LED lo       b
55      LPT3/DTR1L   b        56  1.2 COM4 Tx      t
57  2.6 COM1 Tx(Tx0) t        58      NMI          i
59      COM2 Tx(Tx1) t        60  1.1 COM3 Tx      t

b = TTL bidirectional
r = Rx: TTL and 12-110vac inverted input
i = TTL input with pull-up or pull down
o = TTL output
t = Tx: 12v inv, 5v inv, or 5v non-inv output




4.0 PC BUS PINOUT
-----------------

SOLDER SIDE:            COMPONENT SIDE:
 pin signal              pin signal

  B1  GND                 A1 *A25
  B2  RES                 A2  D7
  B3  VCC                 A3  D6
  B4 *A24                 A4  D5
  B5 *A23                 A5  D4
  B6 *A22                 A6  D3
  B7  -12                 A7  D2
  B8 *A21                 A8  D1
  B9  +12                 A9  D0
 B10  GND                A10  RDY
 B11  MWRL               A11  AEN
 B12  MRDL               A12  A19
 B13  IOWL               A13  A18
 B14  IORL               A14  A17
 B15 *A20                A15  A16
 B16  NC                 A16  A15
 B17  DAK1L              A17  A14
 B18  DRQ1               A18  A13
 B19  NC                 A19  A12  
 B20  NC                 A20  A11
 B21  NC                 A21  A10
 B22  NC                 A22  A09
 B23  NC                 A23  A08
 B24  IRQ                A24  A07
 B25  IRQ                A25  A06
 B26  NC                 A26  A05
 B27  TC                 A27  A04
 B28  ALE                A28  A03
 B29  VCC                A29  A02
 B30  NC                 A30  A01
 B31  GND                A31  A00

*optional


5.0 I/O MAP
-----------

ADDRESS     DESCRIPTION                                                RESET

       DMA Controller and Bus Arbiter
0000  DMA0TAR0/1                                                         xx
0001  DMA0BYC0/1                                                         xx
0002  DMA1TAR0/1                                                         xx
0003  DMA1BYC0/1                                                         xx
0008  DMACMD11/DMASTS                                                    00
0009  DMASRR                                                             00
000A  DMAMSK                                                             04
000B  DMAMOD1                                                            00
000C  DMACLRBP (not a register, logic control signal only)                
000D  DMACLR (not a register, logic control signal only)                
000E  DMACLRMSK (not a register, logic control signal only)                
000F  DMAGRPMSK                                                          03

       Master Interrupt Controller (Int IRQs 0-7)
0020  ICW1m/IRRm/ISRm/OCW2m/OCW3m                                        xx
0021  ICW2m/ICW3m/OCW3m/OCW1m/POLLm                                      xx

       Address Configuration Register 
0022  REMACFG                                                           0000
 d15  Enable Expanded I/O (set by EIEIO sequence)
 d6   Remap COM1 address  (0=dos and hi  1=hi only)
 d5   Remap COM2 address
 d4   Remap Slave 8259
 d3   Remap Master 8259
 d2   Remap DMA address
 d0   Remap Timer Control Unit

       Timer Control Unit (8254)
0040  TMR0                                                               xx
0041  TMR1                                                               xx
0042  TMR2                                                               xx
0043  TMRCON                                                             00

       DMA Page Registers
0083  DMA1TAR2                                                           xx
0085  DMA1TAR3                                                           xx
0086  DMA0TAR3                                                           xx
0087  DMA0TAR2                                                           xx
0098  DMA0BYC2                                                           00
0099  DMA1BYC2                                                           00

0092  A20 Gate and Fast-Reset                                            00

       Slave Interrupt Controller (Ext IRQs, 2nd 8259)
00A0  ICW1s/IRRs/ISRs/OCW2s/OCW3s                                        xx
00A1  ICW2s/ICW3s/OCW3s/OCW1s/POLLs                                      xx

0100-0101  Port 4 (4.7-4.0 outputs)
02F8-02FC  Primary Serial UART (8250)
03F8-03FC  Secondary Serial UART (8250)

The following registers can only be accessed after running the Enable 
Internal Expanded I/O (EIEIO) sequence described below:

F010  DMA0REQ0/1                                                         00
F011  DMA0REQ2/3                                                         00
F012  DMA1REQ0/1                                                         00
F013  DMA1REQ2/3                                                         00
F018  DMABSR                                                             F0
F019  DMACHR\DMAIS                                                       00
F01A  DMACMD2                                                            08
F01B  DMAMOD2                                                            00
F01C  DMAIEN                                                             00
F01D  DMAOVFE                                                            0A
F01E  DMACLRTC                    not a register, logic control signal only

F400  CS0ADL  chip select 0 lo address                                 0000
F402  CS0ADH  chip select 0 hi address                                 0000
F404  CS0MSKL chip select 0 lo mask                                    0000
F406  CS0MSKH chip select 0 hi mask                                    0000
F408  CS1ADL  chip select 1 lo address                                 0000
F40A  CS1ADH  chip select 1 hi address                                 0000
F40C  CS1MSKL chip select 1 lo mask                                    0000
F40E  CS1MSKH chip select 1 hi mask                                    0000
F410  CS2ADL  chip select 2 lo address                                 0000
F412  CS2ADH  chip select 2 hi address                                 0000
F414  CS2MSKL chip select 2 lo mask                                    0000
F416  CS2MSKH chip select 2 hi mask                                    0000
F418  CS3ADL  chip select 3 lo address                                 0000
F41A  CS3ADH  chip select 3 hi address                                 0000
F41C  CS3MSKL chip select 3 lo mask                                    0000
F41E  CS3MSKH chip select 3 hi mask                                    0000
F420  CS4ADL  chip select 4 lo address                                 0000
F422  CS4ADH  chip select 4 hi address                                 0000
F424  CS4MSKL chip select 4 lo mask                                    0000
F426  CS4MSKH chip select 4 hi mask                                    0000
F428  CS5ADL  chip select 5 lo address                                 0000
F42A  CS5ADH  chip select 5 hi address                                 0000
F42C  CS5MSKL chip select 5 lo mask                                    0000
F42E  CS5MSKH chip select 5 hi mask                                    0000
F430  CS6ADL  chip select 6 lo address                                 0000
F432  CS6ADH  chip select 6 hi address                                 0000
F434  CS6MSKL chip select 6 lo mask                                    0000
F436  CS6MSKH chip select 6 hi mask                                    0000
F438  UCSADL  upper chip select lo address                             FF6F?
F43A  UCSADH  upper chip select hi address                             FFFF
F43C  UCSMSKL upper chip select lo mask                                FFFF
F43E  UCSMSKH upper chip select hi mask                                FFFF

F480  SSIOTBUF sync serial tx buffer                                   0000
F482  SSIORBUF sync serial rx buffer                                   0000
F484  SSIOBAUD sync serial baud rate register                          0000
F486  SSIOCON1 sync serial control 1                                   00C0
F488  SSIOCON2 sync serial control 2                                   0000
F48A  SSIOCTR  sync serial counter                                     0000

F4A0  RFSBADR  refresh controller                                      0000
F4A2  RFSCIR   refresh controller                                      0000
F4A4  RFSCON   refresh controller                                      0000
F4A6  RFSADD   refresh controller                                      00FF

F4C0  WDTRLDH watchdog timer reload hi                                 0000
F4C2  WDTRLDL watchdog timer reload lo                                 0000
F4C4  WDTCNTH watchdog timer counter hi                                0000
F4C6  WDTCNTL watchdog timer counter lo                                0000
F4C8  WDTCLR  watchdog timer clear                           not a register         0000
F4CA  WDTSTATUS watchdog timer status                                  0000

F800  Power Controller                                                   00
F804  Clock Prescaler Hi                                                 00
F805  Clock Prescaler Lo                                                 00

 on reset parallel bits have weak pull up/down til first out to PxCFG:
F820  P1CFG port 1 mode (1=peripheral 0=I/O port)               dduuuuuu 00
F822  P2CFG port 2 mode                                         udduuuuu 00
F824  P3CFG port 3 mode                                         dddddddd 00
F826  PINCFG pin configuration register                                  00
 d6  0=cs6l 1=refresh
 d5  0=rereq,busyl,errorl 1=tmrout2,tmrclk2,tmrgate2
 d4  0=dack0l 1=cs5l
 d3  0=eopl 1=cts1l
 d2  0=dack1l 1=txd1
 d1  0=srxclk 1=dtr1l
 d0  0=ssiotx 1=rts1l
F830  DMACFG DMA configuration register                                  00
F832  INTCFG interrupt configuration register                            00
F834  TMRCFG timer configuration register                                00
F836  SIOCFG serial I/O configuration register                           00
F860  P1PIN port 1 pin status (input)                                    xx
F862  P1LTC port 1 data                                                  FF
F864  P1DIR port 1 direction (0=comp out 1=open drain out or in)         FF
F868  P1PIN port 2 pin status                                            xx
F86A  P1LTC port 2 data                                                  FF
F86C  P1DIR port 2 direction                                             FF
F870  P1PIN port 3 pin status                                            xx
F872  P1LTC port 3 data                                                  FF
F874  P1DIR port 3 direction                                             FF

For PC compatibilty reasons addresses above F000 are available only after
the Enable Internal Expanded I/O (EIEIO) sequence is executed as follows:

 cli
 mov ax,80h
 xchg al,ah
 out 23h,al
 xchg al,ah
 out 22h,al
 out 22h,ax




6.0 MEMORY MAP
--------------

0000000-007FFFF  On-board CMOS SRAM
0080000-00BFFFF  PC bus (user) memory
00C0000-00FFFFF  On-board ROM
0100000-3FFFFFF  Protected Mode memory




                         LIMITED WARRANTY 

MVS will repair, free of charge, products suffering from manufacturing
defects for a period of 5 years after invoice.  This will be done only if
the product has not been misused (improper voltage, physical alteration,
etc.).  Otherwise a minimum service charge is required.  In either case it
is necessary to contact MVS for a Returned Merchandise Authorization (RMA)
number and return instructions before shipping the unit.

