EMU Infos
| dumper |
f205v. Kirmo
|
| date |
15/10/2006
|
| emulator |
|
| dev |
|
PCB Infos
| name |
483
|
| description |
Breakout (Seletron) [TTL]
|
| year |
1978
|
| manufacturer |
Seletron
|
Technical references
CPUs
| QTY
|
Type
|
clock
|
position
|
function
|
| 1x |
oscillator |
4MHz |
1j |
|
ROMs
| QTY
|
Type
|
position
|
status
|
| 1x |
82S23 |
2b |
dumped
|
RAMs
PLDs
Others
1x 22x2 JAMMA edge connector
1x trimmer (volume)
1x 8x2 switches DIP
Notes
update 20140630: Kirmo dumped the PROM
update 20140107: kirmo send the following: "Crystal frequency: depending on jumper (2jk): 4MHz , 8MHz , 16 MHz
Main clock frequency : 4 MHz (if an 8 or 16 MHz crystal is used, then the 74LS74 (3J) will cut the frequency down to 4 MHz)
RAM : 1x 74S201 (2H ; 256bit , 256x1 ; bricks in the wall) ; 1x 7489 (1B ; 64bit , 16x4 ; it's in the score section - maybe score memory?)
NOTE: RAM 7489 is open-collector (pull-up resistences are present on the pcb)
Files
-
PCB component side
-
PCB solder side
-
ROMs
483
ROMs
