Welcome, Guest. Please login or register.

Author Topic: A small problem, what do I do?  (Read 1767 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline pyrreTopic starter

A small problem, what do I do?
« on: October 03, 2007, 12:20:07 PM »
I have a dead A500 +, and a fully working A2000.
The 2000 has a kick 1.2 in it, and is only worth playing games  using the floppy.

But the 500+ has kick 2.04 and 1 meg chip ram.
The kickstart is easy to put in the A2000. (it should work just fine).  But the chip ram, is it as easy as just to swap the agnus chips, and i have 1 meg chip in a2000.
Or is it a bigger job than that?
Amiga 1200 Tower Os 3.9
BPPC 603e+ 040-25/200, 256MBram, BVIsionPPC, Indivision AGA MK2.
Amiga 2000 (rev 4.0) Os 1.2/1.3
2088 bridgeboard, 2MB ram card, 2091 SCSI.
Amiga 500+ Os 2.1
Derringer 030, 32MBram, Buddha in sidecar, Indivision ECS.
Amiga CD32
Video decoder
 

Offline Zac67

  • Hero Member
  • *****
  • Join Date: Nov 2004
  • Posts: 2890
    • Show only replies by Zac67
Re: A small problem, what do I do?
« Reply #1 on: October 03, 2007, 02:05:00 PM »
Just transplant the Agnus, adjust the jumper settings (deactivate _EXRAM (open J500) and reroute A19: J101-> 2-3) and you're set.

Oh yes: there's no way to put the PLCC Angus into the early German A2000 model (A2000"A").

PPS: Better be extra careful when pulling Agnus - these old sockets tend to be brittle and you'll be sorry when it breaks.
 

Offline pyrreTopic starter

Re: A small problem, what do I do?
« Reply #2 on: October 03, 2007, 04:33:17 PM »
Thanks, i will have a look at that.
And I will be careful with the agnus sockets
Amiga 1200 Tower Os 3.9
BPPC 603e+ 040-25/200, 256MBram, BVIsionPPC, Indivision AGA MK2.
Amiga 2000 (rev 4.0) Os 1.2/1.3
2088 bridgeboard, 2MB ram card, 2091 SCSI.
Amiga 500+ Os 2.1
Derringer 030, 32MBram, Buddha in sidecar, Indivision ECS.
Amiga CD32
Video decoder
 

Offline tokyoracer

  • Hero Member
  • *****
  • Join Date: Feb 2006
  • Posts: 1590
    • Show only replies by tokyoracer
Re: A small problem, what do I do?
« Reply #3 on: October 04, 2007, 10:52:59 AM »
Some simple stuff you may already know but oh well, make sure you take care removing them. Anti-static stuff like wrist bands are recomended ir just toutching metal stuff for a while will do too.
Also flat head screwdrivers on each side of the chip and pull it out at both sides at the same time. If it is still sort-of in the very gently pull it out bit by bit on each side. If any legs bend you can just about get away with it but oviously each time youi bend them you weeken it so try and be careful. You can get one of these special removers on amigakit if desired too.

Top Tip: Just don't let impatience get the better of you. =P
 

Offline nBit7

  • Full Member
  • ***
  • Join Date: Jul 2007
  • Posts: 143
    • Show only replies by nBit7
Re: A small problem, what do I do?
« Reply #4 on: October 04, 2007, 01:01:06 PM »
Quote
Anti-static stuff like wrist bands are recomended ir just toutching metal stuff for a while will do too.


Just touching ground/metal every so often is a common misconception.  I used to subscribe to it too.  

In the last ESD training coarse I attended it was clearly demonstrated that only a few seconds after grounding oneself enough static could easy be generated to fry a transistor (or IC). The static was measured with a static field meter.  I later played with one of these meters myself and strongly agree that just touching ground momentarily is not good enough.  Also you don't have to touch for long to discharge (not a while like you stated, its almost instantaneous).  But you can be back up to a pre-discharge level doing normal movement in seconds.  So if you are not using a strap or holding your metal for the entire duration, then you might as well not worry at all.
 

Offline ajlwalker

  • Sr. Member
  • ****
  • Join Date: May 2004
  • Posts: 458
    • Show only replies by ajlwalker
Re: A small problem, what do I do?
« Reply #5 on: October 04, 2007, 01:06:03 PM »
Great, now I don't feel an idiot for leaving my foot against the radiator for the entire duration. :lol: