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- Path: rjo02.embratel.net.br!usenet
- From: emenezes@embratel.net.br (Evandro Menezes)
- Newsgroups: comp.sys.amiga.misc,comp.sys.amiga.advocacy,alt.folklore.computers
- Subject: Re: First multitasking OS for home computers
- Date: Sun, 14 Jan 1996 20:59:05 GMT
- Organization: Empresa Brasileira de Telecomunicacoes
- Message-ID: <30f9330f.13824238@news.embratel.net.br>
- References: <4cmd5g$7h0@coranto.ucs.mun.ca> <4cpcnc$hmg@sue.cc.uregina.ca>
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-
- bayko@ARISTOTLE.CS.UREGINA.CA (John Bayko) wrote:
-
- > But if you stretch the definition of both 'multitasking' and
- >'Operating System', then the ZX-81 qualifies, I think - the Z-80 both
- >drove the display, and ran programs in the retrace interval. And it
- >was only $150US (actually, it did this *because* it was only $150US -
- >it only had 4 ICs in the entire thing - Z-80, RAM chip, ROM chip, and
- >glue logic).
-
- Yes, that can be said. After all, display refreshing was a background (or
- foreground?) task handled by the CPU.
-
- Just for the record: the ZX-81 has had few chips only in a later phase when
- the glue logic chips were replaced by a custom gate-array.
-
- []'s
-
-