Difference between revisions of "SIMPLE-6809"
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== Mechanicals == | == Mechanicals == | ||
Revision as of 11:54, 13 September 2022
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Contents
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
- DB-9 Male
- Pinout
- N/C
- Receive
- Transmit
- Loop to pin 6
- GND
- Loop to pin 4
- RTS
- N/C
- N/C
J2 / J5 -EPROM/EEPROM Select Jumpers
| PART | PIN 1 | PIN 27 |
|---|---|---|
| 27128 EPROM | VPP (5V) | PGM (5V) |
| 27C256 EPROM | VPP (5V) | A14 (GND) |
| 27C512 EPROM | A15 (GND) | A14 (GND) |
| AT28C64 EEPROM | N/C | WE (5V) |
| SST27SF256 FLASH | VPP (5V) | A14 (GND) |
| SST27SF512 FLASH | A15 (GND) | A14 (GND) |
J3 - FTDI / TTL Serial
- GND
- RTS* (out)
- +5V
- Receive (in)
- Transmit (out)
- N/C
J4 - 5V Power
- 2x4 header
Software
Mechanicals
