Difference between revisions of "SIMPLE-6802"
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* Build of [http://searle.x10host.com/6809/Simple6809.html Grant Searles's Simple 6809 CPU] | * Build of [http://searle.x10host.com/6809/Simple6809.html Grant Searles's Simple 6809 CPU] | ||
| − | ** Runs | + | ** Runs SmithBUG |
* 68B02 CPU | * 68B02 CPU | ||
| − | ** 1.8432 MHz | + | ** 1.8432 MHz clock |
| + | ** MC6802 is fully compatible with MC6800 but without messy two-phase clocking | ||
* 32KB SRAM | * 32KB SRAM | ||
* 16KB EPROM/EEPROM | * 16KB EPROM/EEPROM | ||
Revision as of 12:00, 13 September 2022
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Features
- Build of Grant Searles's Simple 6809 CPU
- Runs SmithBUG
- 68B02 CPU
- 1.8432 MHz clock
- MC6802 is fully compatible with MC6800 but without messy two-phase clocking
- 32KB SRAM
- 16KB EPROM/EEPROM
- 16KB reserved
- 8KB (28C64 parts can be used)
- 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
- 0x8000-0xBFFF 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
SmithBUG Builds for SIMPLE-MC6802 CPU Card
- SIMPLE-6802 Wiki Page
- Pre-built for 4KB, 8K, 16KB EPROMs
Building Code
- Uses a68 assembler
- Command line makes S-Record output
- Use srec_cat to shift from EPROM absolute addresses to 0x0000 as HEX file
4KB Build
A68 SMITHBUG_SIMPLE-6802_F000.ASM -l SMITHBUG_SIMPLE-6802_F000.LST -s SMITHBUG_SIMPLE-6802_F000.S srec_cat SMITHBUG_SIMPLE-6802_F000.s -offset - -minimum-addr SMITHBUG_SIMPLE-6802_F000.s -o smithbug_F000.hex -Intel
8KB Build
A68 SMITHBUG_SIMPLE-6802_E000.ASM -l SMITHBUG_SIMPLE-6802_E000.LST -s SMITHBUG_SIMPLE-6802_E000.S srec_cat SMITHBUG_SIMPLE-6802_E000.s -offset - -minimum-addr SMITHBUG_SIMPLE-6802_E000.s -o smithbug_E000.hex -Intel
16KB Build
A68 SMITHBUG_SIMPLE-6802_C000.ASM -l SMITHBUG_SIMPLE-6802_C000.LST -s SMITHBUG_SIMPLE-6802_C000.S srec_cat SMITHBUG_SIMPLE-6802_C000.s -offset - -minimum-addr SMITHBUG_SIMPLE-6802_C000.s -o smithbug_C000.hex -Intel
SmithBUG Commands
; M MOVE MEMORY ; E CHANGE MEMORY ; G GO TO PROGRAM ; R PRINT ; T TRACE PROGRAM ; @ ASCII CONVERSION ; H PRINTER ON ; V VIEW MEMORY ; I FILL MEMORY ; J JUMP TO TARGET PROGRAM ; F FIND ; Q HARDWARE LOCATION ; D DISASSEMBLE CODE ; K CONTINUE AFTER BREAK ; 1 BREAKPOINT ONE ; 2 BREAKPOINT TWO ; & S1 LOAD PROGRAM ; * HARDWARE LOCATION (TBA) ; O ECHO ON ; N ECHO OFF
Mechanicals
