1541 Ultimate 6pin expansion header ... how does it work?
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From: BruceMcF on 12 Apr 2008 10:28 TSIA, more or less. I've seen that the 1541 Ultimate has a 6-pin expansion header, described as being included so it can support an autoboot via cassette port mode ... .... but does anyone have the spec for how it works and how its programmed? I want to see whether (yes, as always) it can be set up for an "SPI" serial peripheral interface, this time looking to a small Z80 board to provide a parallel co-processing CP/M ... IOW, as if the CP/M was in the drive rather than embedded inside the keyboard as in the C128.
From: bud on 13 Apr 2008 01:06 Group: comp.sys.cbm Date: Sat, Apr 12, 2008, 7:28am (CDT-2) From: agila61(a)netscape.net (BruceMcF) script: >... IOW, as if the CP/M was in the drive >rather than embedded inside the keyboard >as in the C128. Uhmm, Bruce, only the Z80 is in the 'keyboard' (machine) on the 128. CP/M still boots from a disk. salaam, dowcom To e-mail me, add the character zero to "dowcom". i.e.: dowcom(zero)(at)webtv(dot)net. -- http://community.webtv.net/dowcom/DOWCOMSAMSTRADGUIDE MSWindows is television, Linux is radar.
From: BruceMcF on 13 Apr 2008 10:45 On Apr 13, 1:06 am, dow...(a)webtv.net (bud) wrote: > Group: comp.sys.cbm Date: Sat, Apr 12, 2008, 7:28am (CDT-2) From: > agil...(a)netscape.net (BruceMcF) > script: > >... IOW, as if the CP/M was in the drive > >rather than embedded inside the keyboard > >as in the C128. > Uhmm, Bruce, only the Z80 is in the 'keyboard' (machine) on the 128. > CP/M still boots from a disk. I'm taking it from this that (1) you don't know the answer to the question but (2) you are angling to enter the quibblers haul of fame. When CP/M boots from disk, where does the running BDOS reside? where does the running BIOS reside? When the CCP runs, where does it reside? Where do RSX's reside? Where does the running application reside? Don't be intentionally dense when reading because you are focusing on playing meaningless Usenet news "gotcha" games ... there's no long term benefit on your side from doing that.
From: bud on 14 Apr 2008 01:16 Group: comp.sys.cbm Date: Sun, Apr 13, 2008, 7:45am (CDT-2) From: agila61(a)netscape.net (BruceMcF) script: >I'm taking it from this that >(1) you don't know the answer to the >question Correct >but (2) you are angling to enter the >quibblers haul of fame. Hadn't thought of it, but since you mention it >When CP/M boots from disk, where >does the running BDOS reside? where >does the running BIOS reside? When >the CCP runs, where does it reside? >Where do RSX's reside? Where does >the running application reside? Now I am beginning to understand (?) You didn't intend 'embedded' as I normally understand it. So, you want to run CP/M in a disk drive? >Don't be intentionally dense when >reading because you are focusing >on playing meaningless Usenet >news "gotcha" games ... there's >no long term benefit on your side >from doing that. Thanks for the advice. salaam, dowcom To e-mail me, add the character zero to "dowcom". i.e.: dowcom(zero)(at)webtv(dot)net. -- http://community.webtv.net/dowcom/DOWCOMSAMSTRADGUIDE MSWindows is television, Linux is radar.
From: BruceMcF on 14 Apr 2008 18:10
On Apr 14, 1:16 am, dow...(a)webtv.net (bud) wrote: > Now I am beginning to understand (?) You didn't intend 'embedded' as I > normally understand it. > So, you want to run CP/M in a disk drive? Why not? A C64 disk drive is a small computer with a disk but without a console that talks to the C64 over a serial port (albeit not an RS-232C port). Lots of CP/M applications are perfectly happy working with that kind of setting. The C64/C128 polling the IEC, sorting out input requests and output to display ... the CP/M would be running entirely parallel to the C64, with its own RAM. |