Breakout (Seletron) (TTL)

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EMU Infos
dumper f205v, Kirmo
date 15/10/2006
emulator
dev
PCB Infos
name 483
description Breakout (Seletron) [TTL]
year 1978
manufacturer Seletron

Contents

Technical references

CPUs

QTY Type clock position function
1x oscillator 4MHz 1j

ROMs

QTY Type position status
1x 82S23 2b dumped

RAMs

QTY Type position
1x 74S201 2h
1x 7489 1b

PLDs

QTY Type position status

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

483

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