[Info-vax] fortune mod tonight

Bob Eager news0001 at eager.cx
Mon Oct 17 17:28:02 EDT 2011


On Mon, 17 Oct 2011 17:15:38 -0400, Richard B. Gilbert wrote:

> On 10/17/2011 12:38 AM, cornelius at lps.mayo.edu wrote:
>> Carl Friedberg<frida.fried at gmail.com>  wrote:
>>> No one has mentioned the infamous IBM 7090 instruction:
>>>
>>> HCF       Halt and Catch Fire
>>
>> I have an unsent response which included it, but I mentioned it as an
>> X86 issue  [I think there may have been an Intel bug which people
>> applied that moniker to].
>>
>> So what were the consequences on the 7090?
>>
>> George
> 
> 
> Datamation published a long list of proposed Opcodes.  I may still have
> a copy somewhere.

The Honeywell 516 had a problem with tight loops (a.k.a. JMP .). It 
overheated the core memory.

-- 
Use the BIG mirror service in the UK:
 http://www.mirrorservice.org

*lightning protection* - a w_tom conductor



More information about the Info-vax mailing list