[simpits-tech] OT for you "back in the day" computer users..

[Alan D. Mazurka]

hi,

it's Prime Macro Assembler - the language of (now non-existant) Prime 
Computers.

we would fat-finger this little diddy on the control panel to see if the 
newly-assembled machine thought it was a computer - as opposed to a bunch 
of parts just recently put together.

it would read the console switches (device address 1620) , output them to 
the LEDS (device address 1720  on the control panel), and just keep on 
doing it. flip a switch, light a LED.

(you're still a geek, but you're in good company :-)

  - adm -

At 05:31 PM 6/15/2004, you wrote:
> > 1000: INA 1620
> > 1001: OTA 1720
> > 1002: JMP 1000
> >
> > ....those were the days.
> >
>
>*sobs*  I am _such_ a geek.
>
>If you're after 6502 code, you missed. :)  OTA and INA are not valid
>opcodes and even if they were, your addressing is off. :)  The instruction
>is one byte and the operands are two bytes, so assuming OTA and INA _were_
>valid, you'd have:
>
>1000   INA $1620
>1003   OTA $1720
>1006   JMP $1000
>
>Which if course would be an endless loop and you'd lock the machine up. :)
>
>
>g.
>
>*wanders away mumbling about indirect addressing modes and cursing Chuck
>Peddle...*
>
>
>
>_______________________________________________
>Simpits-tech mailing list
>Simpits-tech at simpits.org
>http://www.simpits.org/mailman/listinfo/simpits-tech
>To unsubscribe, please see the instructions at the bottom of the above 
>page.  Thanks!


----------

Alan D. 
Mazurka 
adm.design at verizon.net
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.simpits.org/pipermail/simpits-tech/attachments/20040615/2e957f72/attachment-0001.html