Difference between revisions of "SIMPLE-6802"

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Line 48: Line 48:
  
 
{| class="wikitable"
 
{| class="wikitable"
−
! PART
+
! 27512
−
! PIN 1
+
! 27256
−
! PIN 27
+
! 27128
 +
! 2764
 +
! 28C64
 +
! PIN
 +
!
 +
! PIN
 +
! 2764
 +
! 28C64
 +
! 27128
 +
! 27256
 +
! 27512
 
|-
 
|-
−
| 27128 EPROM
+
| A15
−
| VPP (5V)
+
| VPP
−
| PGM (5V)
+
| VPP
 +
| VPP
 +
| N/C
 +
| 1
 +
|
 +
| 28
 +
| VCC
 +
| VCC
 +
| VCC
 +
| VCC
 +
| VCC
 +
|-
 +
| A12
 +
| A12
 +
| A12
 +
| A12
 +
| A12
 +
| 2
 +
|
 +
| 27
 +
| PGM
 +
| WE*
 +
| PGM
 +
| A14
 +
| A14
 +
|-
 +
| A7
 +
| A7
 +
| A7
 +
| A7
 +
| A7
 +
| 3
 +
|
 +
| 26
 +
| A13
 +
| N/C
 +
| A13
 +
| A13
 +
| A13
 
|-
 
|-
−
| 27C256 EPROM
+
| A6
−
| VPP (5V)
+
| A6
−
| A14 (GND)
+
| A6
 +
| A6
 +
| A6
 +
| 4
 +
|
 +
| 25
 +
| A8
 +
| A8
 +
|
 +
| A8
 +
| A8
 
|-
 
|-
−
| 27C512 EPROM
+
| A5
−
| A15 (GND)
+
| A5
−
| A14 (GND)
+
| A5
 +
| A5
 +
| A5
 +
| 5
 +
|
 +
| 24
 +
| A9
 +
| A9
 +
|
 +
| A9
 +
| A9
 
|-
 
|-
−
| AT28C64 EEPROM
+
| A4
−
| N/C
+
| A4
−
| WE (5V)
+
| A4
 +
| A4
 +
| A4
 +
| 6
 +
|
 +
| 23
 +
| A11
 +
| A11
 +
|
 +
| A11
 +
| A11
 +
|-
 +
| A3
 +
| A3
 +
| A3
 +
| A3
 +
| A3
 +
| 7
 +
|
 +
| 22
 +
| OE*
 +
| OE*
 +
|
 +
| OE*
 +
| OE*
 +
|-
 +
| A2
 +
| A2
 +
| A2
 +
| A2
 +
| A2
 +
| 8
 +
|
 +
| 21
 +
| A10
 +
| A10
 +
|
 +
| A10
 +
| A10
 +
|-
 +
| A1
 +
| A1
 +
| A1
 +
| A1
 +
| A1
 +
| 9
 +
|
 +
| 20
 +
| CE*
 +
| CE*
 +
|
 +
| CE*
 +
| CE*
 +
|-
 +
| A0
 +
| A0
 +
| A0
 +
| A0
 +
| A0
 +
| 10
 +
|
 +
| 19
 +
| D7
 +
| D7
 +
|
 +
| D7
 +
| D7
 +
|-
 +
| D0
 +
| D0
 +
| D0
 +
| D0
 +
| D0
 +
| 11
 +
|
 +
| 18
 +
| D6
 +
| D6
 +
|
 +
| D6
 +
| D6
 +
|-
 +
| D1
 +
| D1
 +
| D1
 +
| D1
 +
| D1
 +
| 12
 +
|
 +
| 17
 +
| D5
 +
| D5
 +
|
 +
| D5
 +
| D5
 
|-
 
|-
−
| SST27SF256 FLASH
+
| D2
−
| VPP (5V)
+
| D2
−
| A14 (GND)
+
| D2
 +
| D2
 +
| D2
 +
| 13
 +
|
 +
| 16
 +
| D4
 +
| D4
 +
|
 +
| D4
 +
| D4
 
|-
 
|-
−
| SST27SF512 FLASH
+
| GND
−
| A15 (GND)
+
| GND
−
| A14 (GND)
+
| GND
 +
| GND
 +
| GND
 +
| 14
 +
|
 +
| 15
 +
| D3
 +
| D3
 +
|
 +
| D3
 +
| D3
 
|-
 
|-
 
|}
 
|}

Revision as of 16:22, 16 September 2022

SIMPLE-6802 REV1 FRONT (BLK).png

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

SIMPLE-6802 REV1 CAD.PNG

J1 - RS-232 Serial

  • DB-9 Male
  • Pinout
  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

27512 27256 27128 2764 28C64 PIN PIN 2764 28C64 27128 27256 27512
A15 VPP VPP VPP N/C 1 28 VCC VCC VCC VCC VCC
A12 A12 A12 A12 A12 2 27 PGM WE* PGM A14 A14
A7 A7 A7 A7 A7 3 26 A13 N/C A13 A13 A13
A6 A6 A6 A6 A6 4 25 A8 A8 A8 A8
A5 A5 A5 A5 A5 5 24 A9 A9 A9 A9
A4 A4 A4 A4 A4 6 23 A11 A11 A11 A11
A3 A3 A3 A3 A3 7 22 OE* OE* OE* OE*
A2 A2 A2 A2 A2 8 21 A10 A10 A10 A10
A1 A1 A1 A1 A1 9 20 CE* CE* CE* CE*
A0 A0 A0 A0 A0 10 19 D7 D7 D7 D7
D0 D0 D0 D0 D0 11 18 D6 D6 D6 D6
D1 D1 D1 D1 D1 12 17 D5 D5 D5 D5
D2 D2 D2 D2 D2 13 16 D4 D4 D4 D4
GND GND GND GND GND 14 15 D3 D3 D3 D3

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

Software

SmithBUG Builds for SIMPLE-MC6802 CPU Card

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

SIMPLE-6802 REV1 MECHS.PNG

Assembly Sheet

SIMPLE-6802 Rev 1 Assembly Sheet

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