Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.arch.embedded > #24560
| From | Philipp Klaus Krause <pkk@spth.de> |
|---|---|
| Newsgroups | comp.arch.embedded |
| Subject | Re: Early 8051 variants with dual dptr (AMD?) |
| Date | 2016-07-07 01:19 +0200 |
| Organization | solani.org |
| Message-ID | <nlk3m5$q3b$1@solani.org> (permalink) |
| References | <nkvuhd$7tf$1@solani.org> <nl03qh$s7i$1@solani.org> <n029nb5r45t3n80p6hjahjdkhivh4k8itf@4ax.com> <td39nbhn82svvq4c2k3r77rkq27hp1mm5k@4ax.com> |
On 30.06.2016 05:28, Martin Riddle wrote: > On Wed, 29 Jun 2016 22:52:02 -0400, Martin Riddle > <martin_ridd@verizon.net> wrote: > >> On Wed, 29 Jun 2016 11:19:31 +0200, Philipp Klaus Krause <pkk@spth.de> >> wrote: >> >>> On 29.06.2016 09:49, Philipp Klaus Krause wrote: >>>> Which were the first 8051 derivatives with multiple dptr? AFAIK the >>>> Siemens 80C517 was the first with 8 dptr. I've read that AMD had an >>>> early dual dptr vairant, but couldn't find a datasheet yet. >>>> Which device was the first to use the following scheme: >>>> DPL1 at 0x84, DPH1 at 0x85, DPS at 0x86.0? >>>> >>>> Philipp >>>> >>> >>> I found the AMD 80C521, which looks like a good candiate for the first >>> dual-dptr 8051-variant. But I'm not sure if there might be earlier ones. >>> >>> Philipp >> I vaguely remember a Dallas Part with dual data pointers. Not sure if >> it was among the first tho. Maybe 1996 or so. >> keil has a list and data sheets on their site. >> >> Cheers > In the Phillips IC20 1997 data book the 80C52 has the feature list > 'Second DPTR register' Dated 1996 Aug 16 Hmm, in µCSim the only Philips dual-dptr part is the P89C51R. I wonder which one had dual dptr first. AFAIK the P89C51R had DPS at 0xa2 and neither dpl1 nor dph1. Philipp
Back to comp.arch.embedded | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Early 8051 variants with dual dptr (AMD?) Philipp Klaus Krause <pkk@spth.de> - 2016-06-29 09:49 +0200
Re: Early 8051 variants with dual dptr (AMD?) Philipp Klaus Krause <pkk@spth.de> - 2016-06-29 11:19 +0200
Re: Early 8051 variants with dual dptr (AMD?) Martin Riddle <martin_ridd@verizon.net> - 2016-06-29 22:52 -0400
Re: Early 8051 variants with dual dptr (AMD?) Martin Riddle <martin_ridd@verizon.net> - 2016-06-29 23:28 -0400
Re: Early 8051 variants with dual dptr (AMD?) rickman <gnuarm@gmail.com> - 2016-06-30 00:15 -0400
Re: Early 8051 variants with dual dptr (AMD?) Philipp Klaus Krause <pkk@spth.de> - 2016-06-30 09:37 +0200
Re: Early 8051 variants with dual dptr (AMD?) Martin Riddle <martin_ridd@verizon.net> - 2016-06-30 08:26 -0400
Re: Early 8051 variants with dual dptr (AMD?) Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2016-06-30 22:52 +0200
Re: Early 8051 variants with dual dptr (AMD?) Philipp Klaus Krause <pkk@spth.de> - 2016-07-01 08:06 +0200
Re: Early 8051 variants with dual dptr (AMD?) Philipp Klaus Krause <pkk@spth.de> - 2016-07-07 01:19 +0200
Re: Early 8051 variants with dual dptr (AMD?) Philipp Klaus Krause <pkk@spth.de> - 2016-06-30 09:28 +0200
csiph-web