3 ms·
Do you have any links/info on how that 0-bit byte worked? It sounds like just the right thing for a Friday afternoon read ;D
by eqvinox 2y ago
Do you have any links/info on how that 0-bit byte worked? It sounds like just the right thing for a Friday afternoon read ;D
- larsbrinkhoff 2y agoIt should be in the description for the byte instructions: LDB, DPB, IBP, and ILDB. http://bitsavers.org/pdf/dec/pdp10/1970_PDP-10_Ref/ http://bitsavers.org/pdf/dec/pdp10/1970_PDP-10_Ref/ Basically, loading a 0-bit byte from memory gets you a 0. Depositing a 0-bit byte will not alter memory, but may do an ineffective read-modify-write cycle. Incrementing a 0-bit byte pointer will leave it unchanged.