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LCIII and serial printing

H

Hjalmar

Experienced Member
Joined
Apr 28, 2022
Messages
89
I recapped a LCIII and everything seems to work fine except when I go to print. An error message pops up that the serial port is in use by another program. I tried removing anything from the Extensions folder that might affect the serial port and still have the same error. Is there a program or utility that would tell me what has a hold of that port.

I did reverse the one cap on the motherboard that is mislabeled.

Thanks,
Todd
 
I basically don't know much about Macs or apple products in general. I just keep picking them up for cheap and end up recapping them.
You hit the nail on the head, went into chooser and selected the printer and port and disabled Apple Talk and now everything works. Thanks for pointing me in the right direction.

Todd
 
If you want a free speed boost, you can move a couple of resistors around and upgrade the machine to LCIII+ spec of 33 MHz. You'll want to put a heatsink on the 68030 though.

Those early Motorola parts ran smoking hot. I replaced the MC part on mine with a Freescale 68030 and have it at 33 MHz. Thing barely gets warm.

1763295404213.png
 
Thanks, I'll keep that in mind. Not really sure what I'm going to do with it.
Todd
 
GiGaBiTe said:
If you want a free speed boost, you can move a couple of resistors around and upgrade the machine to LCIII+ spec of 33 MHz. You'll want to put a heatsink on the 68030 though.

Those early Motorola parts ran smoking hot. I replaced the MC part on mine with a Freescale 68030 and have it at 33 MHz. Thing barely gets warm.

View attachment 1311291
Click to expand...
I did the mod on mine and did not add a heatsink because of clearance fears. Works fine, even for extended periods, without crashing
 
Hjalmar said:
Thanks, I'll keep that in mind. Not really sure what I'm going to do with it.
Todd
Click to expand...

It's good for playing some of the more demanding 68k era games. Sim City, Sim City 2000, Sim Tower, etc.

maxtherabbit said:
I did the mod on mine and did not add a heatsink because of clearance fears. Works fine, even for extended periods, without crashing
Click to expand...

Mine at the stock 25 MHz, the CPU was so hot that you couldn't hold your finger on it for more than a few seconds. At 33 MHz, it'd start evaporating water. It would run for maybe 10-15 minutes before it started getting unstable and crash. It doesn't do that anymore with the Freescale part.

My Performa 600 with a 33 MHz rated part also gets hotter than the blazes of hell, I'll probably replace that one with a Freescale 68030 as well when I have the chance. I'm still looking for a IIvx motherboard as a donor for cache chips.

When I still had the original MC part, I found some low profile 40mm heatsinks that would fit on the CPU and not interfere with the PDS slot network card. I tucked a small 40mm blower next to it to blow over the heatsink and it worked well.
 
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GiGaBiTe said:
It's good for playing some of the more demanding 68k era games. Sim City, Sim City 2000, Sim Tower, etc.



Mine at the stock 25 MHz, the CPU was so hot that you couldn't hold your finger on it for more than a few seconds. At 33 MHz, it'd start evaporating water. It would run for maybe 10-15 minutes before it started getting unstable and crash. It doesn't do that anymore with the Freescale part.

My Performa 600 with a 33 MHz rated part also gets hotter than the blazes of hell, I'll probably replace that one with a Freescale 68030 as well when I have the chance. I'm still looking for a IIvx motherboard as a donor for cache chips.

When I still had the original MC part, I found some low profile 40mm heatsinks that would fit on the CPU and not interfere with the PDS slot network card. I tucked a small 40mm blower next to it to blow over the heatsink and it worked well.
Click to expand...
my understanding is that the original part was made on two different process nodes, the latter version generates less heat
 
maxtherabbit said:
my understanding is that the original part was made on two different process nodes, the latter version generates less heat
Click to expand...

Yeah, the later Freescale parts were on a smaller process node and generated significantly less heat. They're also in a plastic package vs a ceramic of the original parts.
 
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