Difference between revisions of "SIMPLE-6809"

From Land Boards Wiki
Jump to navigation Jump to search
Line 24: Line 24:
 
* 0xC000-0xCFFF 16KB EPROM
 
* 0xC000-0xCFFF 16KB EPROM
  
−
== Connectors ==
+
== Headers / Connectors ==
  
 
=== J1 - RS-232 Serial ===
 
=== J1 - RS-232 Serial ===
Line 37: Line 37:
 
# N/C
 
# N/C
 
# N/C
 
# N/C
 +
 +
=== J2 / J5 -EPROM/EEPROM Select Jumpers ===
 +
 +
{| class="wikitable"
 +
! PART
 +
! J2 PIN 1
 +
! J5 PIN 27
 +
|-
 +
| 27128 EPROM
 +
| VPP (5V)
 +
| PGM (5V)
 +
|-
 +
| 27C256 EPROM
 +
| VPP (5V)
 +
| A14 (GND)
 +
|-
 +
| 27C512 EPROM
 +
| A15 (GND)
 +
| A14 (GND)
 +
|-
 +
| SST27SF256 EEPROM
 +
| VPP (5V)
 +
| A14 (GND)
 +
|-
 +
| SST27SF512 EEPROM
 +
| A15 (GND)
 +
| A14 (GND)
 +
|-
 +
|}
  
 
=== J3 - FTDI / TTL Serial ===
 
=== J3 - FTDI / TTL Serial ===

Revision as of 17:36, 12 September 2022

SIMPLE-6809 REV1 FRONT (BLK).png

Features

  • Build of Grant Searles's Simple 6809 CPU
    • Runs BASIC
  • 6809 CPU
  • 1.8543 MHz
  • 32KB SRAM
  • 16KB EPROM/EEPROM
  • 68B50 Serial Port (ACIA)
    • RS-232 port
    • Header for FTDI
    • 115,200 baud
  • Reset switch with optional Power Supervisor
  • 95x95mm card
  • (4) 6-32 mounting holes

Memory Map

  • 0x0000-0x7FFF 32KB SRAM
  • 0x8000-0x9FFF Free Space (8KB)
  • 0xA000-0xBFFF Serial (ACIA)
  • 0xC000-0xCFFF 16KB EPROM

Headers / Connectors

J1 - RS-232 Serial

  1. N/C
  2. Receive
  3. Transmit
  4. Loop to pin 6
  5. GND
  6. Loop to pin 4
  7. RTS
  8. N/C
  9. N/C

J2 / J5 -EPROM/EEPROM Select Jumpers

PART J2 PIN 1 J5 PIN 27
27128 EPROM VPP (5V) PGM (5V)
27C256 EPROM VPP (5V) A14 (GND)
27C512 EPROM A15 (GND) A14 (GND)
SST27SF256 EEPROM VPP (5V) A14 (GND)
SST27SF512 EEPROM A15 (GND) A14 (GND)

J3 - FTDI / TTL Serial

  1. GND
  2. RTS* (out)
  3. +5V
  4. Receive (in)
  5. Transmit (out)
  6. N/C

J4 - 5V Power

  • 2x4 header

Mechanicals

SIMPLE-6809 REV1 MECHS.PNG

Assembly Sheet

SIMPLE-6809 Rev 1 Assembly Sheet

Retrieved from "http://land-boards.com/blwiki/index.php?title=SIMPLE-6809&oldid=19788"