Sujet : Re: Whether something is RISC or not (Re: PDP-8 theology, not Concertina II Progress)
De : ldo (at) *nospam* nz.invalid (Lawrence D'Oliveiro)
Groupes : comp.archDate : 16. Apr 2024, 02:35:06
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <uvkh3q$ihej$2@dont-email.me>
References : 1 2 3 4 5 6 7 8 9
User-Agent : Pan/0.155 (Kherson; fc5a80b8)
On Sun, 14 Jan 2024 14:30:51 -0500, EricP wrote:
Furthermore, the address and data registers and buses are 16 bits and
the high 16-bits are shared ...
No, in the 68000 family the A- and D- registers are 32 bits.
If you compare the earlier members with the 68020 and later, it becomes
clear that the architecture was designed as full 32-bit from the
beginning, and then implemented in a cut-down form for the initial 16-bit
products. Going full 32-bit was just a matter of filling in the gaps.
Re: Whether something is RISC or not (Re: PDP-8 theology, not Concertina II Progress)
Re: Whether something is RISC or not (Re: PDP-8 theology, not Concertina II Progress)