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Glitch Works 8085 SBC rev 3

GW-8085SBC-3

User’s Manual and Assembly Guide

Revision 1, 2018-06-30

2018 The Glitch Works

http://www.glitchwrks.com/

This manual is licensed under a

Creative Commons “Attribution-NonCommercial-ShareAlike 4.0” license.

Содержание 8085 SBC

Страница 1: ...rev 3 GW 8085SBC 3 User s Manual and Assembly Guide Revision 1 2018 06 30 c 2018 The Glitch Works http www glitchwrks com This manual is licensed under a Creative Commons Attribution NonCommercial Sh...

Страница 2: ...cklist 5 3 3 Insert Socketed ICs 6 3 4 Solder Console Cable 6 4 Initial Checkout and Testing 7 4 1 Troubleshooting 7 4 2 Repair and Service 7 5 Technical Notes 8 5 1 Board Control Register 8 5 2 Board...

Страница 3: ...atically selected by option switches on reset power up This also allows for in board updates to GWMON without overwriting the current known good copy 2 Configuration The 8085 SBC rev 3 includes a numb...

Страница 4: ...rk both J1 and J2 must be strapped for 2 3 2 3 Interrupt Jumpering The five hardware interrupt lines of the Intel 8085 are pulled down to an inactive state with 4 7 k resistors While they are not used...

Страница 5: ...rn adafruit com adafruit guide excellent soldering 3 1 Assembling the 8085 SBC rev 3 If you purchased a full Glitch Works parts kit we recommend completing all assembly sections since extra features c...

Страница 6: ...at U21 Install 28 pin sockets at U15 U16 U17 and U19 Install a 40 pin socket at U9 Install 22 F 10V capacitors at C8 and C17 bend leads with needle node pliers Install micro tact pushbutton at SW1 In...

Страница 7: ...table to build a console cable appropriate to your intended terminal J6 Pin DB25F DCE Pin DB25F DTE Pin Function 1 5 4 Request to Send 2 3 2 Transmit Data 3 2 3 Receive Data 4 4 5 Clear to Send 5 7 7...

Страница 8: ...observed during assembly workshops Recheck configuration options Ensure your serial terminal or terminal emulator software is properly config ured and that your cable is wired correctly a RS 232 light...

Страница 9: ...ows the 8085 to read ROM code at 0x0000 on reset Writing a 0 to this bit clears it and immediately switches off the ROM Boot functionality Typically ROM boot code should contain a jump to a startup ro...

Страница 10: ...p flop ROM Boot is enabled when this bit reads 1 Bit 4 reflects the status of the ROM Enabled flip flop ROM is enabled when this bit reads 1 Bits 5 7 reflect the state of the ROM Page Address latch wh...

Страница 11: ...lting in SW3 1 4 being ignored ROM BASE always at 0xF000 All later parts kits include 10 k or smaller resistor packs for both positions Thanks to Josh Bensadon for reporting this error 6 2 ROM Compati...

Страница 12: ...chased a full Glitch Works parts kit be sure it includes the following 1x 20 pF radial ceramic capacitor 19x 0 01 F axial ceramic capacitor yellow bead 2x 10 nF 16 V radial ceramic capacitor 2x 22 F 1...

Страница 13: ...S 232 level shifter 1x DS1233 EconoReset 2x 8 position DIP switch 3x red T 5 LED 1x mini tact pushbutton switch 1x 22 pin breakaway header strip 2x jumper shunt 1x 2 position Molex KK 100 header 1x 5...

Страница 14: ......

Страница 15: ...16 A13 26 RESET_IN 36 AD5 17 A14 27 CLK_OUT 37 AD6 18 A15 28 HLDA 38 AD7 19 S0 29 HOLD 39 U9 8085 GND GND VCC VDD VSS C19 C C20 C C21 C C22 C C23 C C24 C C12 C W1 MTG W2 MTG W3 MTG W4 MTG GND Mounting...

Страница 16: ...74LS32 BR W RD STATUS_REG_CS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SW2 I O BASE BA7 BA6 BA5 BA4 BA3 BA2 RP2 10K GND VCC AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 Q11 1 Q5 2 Q4 3 Q6 4 Q3 5 Q2 6 Q1 7 Q0 9 CLK 10...

Страница 17: ...e Select Logic Memory Devices CONTROL_REG_CS A B 1 A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 B7 11 B6 12 B5 13 B4 14 B3 15 B2 16 B1 17 B0 18 CE 19 U18 74LS245 STATUS_REG_CS RPA0 RPA1 RPA2 ROM_ENABLED RO...