| Peter Lacey 2004-06-25, 7:05 pm |
| "Clark F. Morris, Jr." wrote:
>
> Warren Simmons wrote:
>
> The 705 mod III had Receive Serial (set the location for the move or
> store) followed by a Transfer Store Location. The perform thus would
> store the next instruction location in the instruction address of the
> implied or explicit EXIT instruction and the EXIT instruction would
> store the next Instruction address in the EXIT Transfer Store Location
> making a branch to next instruction. The store next instruction
> location and branch of the RCA 301 worked the same way (V1
> store-address,branch address). Unfortunately, the IBM 360 did not have
> a comparable instruction or capability.
Seems to me that we did something very similar: using a S define
constant with the address of where we wanted to go back to plugged into
the address field of the unconditional branch to return: but it only
worked (as I recall) on machines with 32K or less memory.
PL
|