[M100] laser pc4

[Peter Vollan]

I have the very small Laser PC4 portable computer. It works, although it
unfortunately lacks a dialer, but it has no cables. The serial and printer
cables use the same port, a DB15. Any ideas?

Re: [M100] laser pc4

[Peter Vollan]

It has a DB15 connector that you use to plug in the serial transfer
cable or the parallel printer cable. It is not much use for writing if
I cannot get said writing out of it. I could make a cable, but I can't
find anything about the cables or the pinout of the connector.

BTW my unit could have a telephone dialer, but it doesn't.

On Sat, 29 Sep 2018 at 09:16, John R. Hogerhuis  wrote:
>
>
>
> On Sat, Sep 29, 2018, 7:02 AM Bert Put  wrote:
>>
>> Is that correct?  2 Meg of ROM but only 32K of RAM?  I thought the Z80
>> could only address 64K of memory at a time.
>>
>> And BTW, in case no one has said it, thank you for helping keep the list
>> a fun place to be. :-)
>
>
> Well the 8085 only has 64k of address space but we have 64k of rom and 32k of 
> ram. Unless you have a REX in which case it's comparable to the Laser.
>
> It's good to be able to fit more applications.
>
> As to the list, I just sweep the floors :-) Everyone who participates in 
> these discussions, brings new programs and hardware to the group, supports 
> each other make it fun.
>
> -- John

Re: [M100] laser pc4

[John Gardner]

Hi Bert -

The seeming conundrum of 16-bit addressing of > 64K

is accomplished by switching "Banks" of memory - For

instance my 8201a has a 32K ROM,  & 3 banks of 32K

RAM which may be addressed at any one time.

Further,  there's a system bus connector which allows a

plug-in 128K RAM cartridge - Which is also expandable;

pretty slick,  really...

   Jack

On 9/29/18, John R. Hogerhuis  wrote:
> On Sat, Sep 29, 2018, 7:02 AM Bert Put  wrote:
>
>> Is that correct?  2 Meg of ROM but only 32K of RAM?  I thought the Z80
>> could only address 64K of memory at a time.
>>
>> And BTW, in case no one has said it, thank you for helping keep the list
>> a fun place to be. :-)
>>
>
> Well the 8085 only has 64k of address space but we have 64k of rom and 32k
> of ram. Unless you have a REX in which case it's comparable to the Laser.
>
> It's good to be able to fit more applications.
>
> As to the list, I just sweep the floors :-) Everyone who participates in
> these discussions, brings new programs and hardware to the group, supports
> each other make it fun.
>
> -- John
>
>>
>

Re: [M100] laser pc4

[John R. Hogerhuis]

On Sat, Sep 29, 2018, 7:02 AM Bert Put  wrote:

> Is that correct?  2 Meg of ROM but only 32K of RAM?  I thought the Z80
> could only address 64K of memory at a time.
>
> And BTW, in case no one has said it, thank you for helping keep the list
> a fun place to be. :-)
>

Well the 8085 only has 64k of address space but we have 64k of rom and 32k
of ram. Unless you have a REX in which case it's comparable to the Laser.

It's good to be able to fit more applications.

As to the list, I just sweep the floors :-) Everyone who participates in
these discussions, brings new programs and hardware to the group, supports
each other make it fun.

-- John

>

Re: [M100] laser pc4

[Bert Put]

Is that correct?  2 Meg of ROM but only 32K of RAM?  I thought the Z80
could only address 64K of memory at a time.

And BTW, in case no one has said it, thank you for helping keep the list
a fun place to be. :-)

Cheers,Bert

On 09/18/2018 03:13 PM, John R. Hogerhuis wrote:
> I saw your message.
> 
> I think the Laser PC4 qualifies as a true portable by my definition.
> 
> http://bitchin100.com/wiki/index.php?title=True_Portable_Definition
> 
> https://oldcomputermuseum.com/laser_pc4.html
> 
> Whatever experiences you can share would be great.
> 
> -- John.

Re: [M100] laser pc4

[John R. Hogerhuis]

I saw your message.

I think the Laser PC4 qualifies as a true portable by my definition.

http://bitchin100.com/wiki/index.php?title=True_Portable_Definition

https://oldcomputermuseum.com/laser_pc4.html

Whatever experiences you can share would be great.

-- John.

Re: [M100] laser pc4

[Kevin Becker]

I saw your message, but it's not a computer that I am familiar with.

On Tue, Sep 18, 2018 at 3:16 PM, Peter Vollan  wrote:

> Did my message get through? The unit has basic, but it is type I am
> not familiar with
>
> On Sun, 16 Sep 2018 at 23:42, Peter Vollan  wrote:
> >
> > Just picked one up. It has a Thesaurus cartridge.
>

Re: [M100] laser pc4

[Peter Vollan]

Did my message get through? The unit has basic, but it is type I am
not familiar with

On Sun, 16 Sep 2018 at 23:42, Peter Vollan  wrote:
>
> Just picked one up. It has a Thesaurus cartridge.

[M100] laser pc4

[Peter Vollan]

Just picked one up. It has a Thesaurus cartridge.