jeff@uf.msc.umn.edu (Jeff Turner) (06/11/91)
Has anyone heard of the 6808? I have a couple of computers that use them (video games actually) and would like to know the chip's instruction set. Can anyone point me towards book that describes its operation? Thanks, Jeff. --- Jeff Turner EMAIL: jeff@msc.edu Minnesota Supercomputer Center, Inc. VOICE: (612) 626-0544 Minneapolis, Minnesota 55415 FAX: (612) 624-6550
kdarling@hobbes.catt.ncsu.edu (Kevin Darling) (06/11/91)
jeff@uf.msc.umn.edu (Jeff Turner) writes: >Has anyone heard of the 6808? I have a couple of computers that use them >(video games actually) and would like to know the chip's instruction set. The Motorola 6808 is a 6800 with an internal cpu clock circuit. So any old 6800/6802/6808 manual or book will do. cheers - kevin <kdarling@catt.ncsu.edu>
larry@chinet.chi.il.us (Larry DeMar) (06/11/91)
In article <4257@uc.msc.umn.edu> jeff@uf.UUCP (Jeff Turner) writes: >Has anyone heard of the 6808? I have a couple of computers that use them >(video games actually) and would like to know the chip's instruction set. > This is actually a 6800, with the 6800 instruction set. The original 6800 had an external clock which required a clock chip and a crystal. About 10 years ago, they came out with the 6802 and 6808 which have an internal clock and just require the external crystal. They largely discontinued the 6800 at that time. One of the two chips (6802 or 6808) has internal ram also but I don't remember which is which. -- ------------------------------------------ Email: chinet!larry@gargoyle.uchicago.edu
kindred@pyrite.telesci.UUCP (David L Kindred (Dave)) (06/11/91)
In article <4257@uc.msc.umn.edu> jeff@uf.msc.umn.edu (Jeff Turner) writes:
Has anyone heard of the 6808? I have a couple of computers that use them
(video games actually) and would like to know the chip's instruction set.
The 6808 is a 6802 without the 6802's internal RAM. The 6802 is a
6800 with a small internal RAM, and most important, an internal clock
circuit. There are no instruction set differences between the 6800,
6802, and 6808.
Of course, double check that indeed you've got the 6808 and no the
68008, which is a 68000 with an 8-bit external bus.
Can anyone point me towards book that describes its operation?
Look for any of the old 6800 books. (If you need a list, let me know).
- Dave
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Snail: TeleSciences C O Systems, 351 New Albany Rd, Moorestown, NJ 08057-1177"stan phillips" <stan.phillips@canrem.uucp> (06/13/91)
Conf: U-M6809 (1132) Direction: FORWARD ???????????????????????????????????????????????????????????????????????????????? JT>Original subject: 6808 JT>Has anyone heard of the 6808? I have a couple of computers that use them JT>(video games actually) and would like to know the chip's instruction set. JT>Can anyone point me towards book that describes its operation? Hi there. The 6808 is the same as the 6800 but has the crystal and clock circuits built in. This would explain the use in video games as it is cheaper on chips and assembly. Stan Phillips --- ? DeLuxe?/386 1.12 #2050 ? Have a good day. -- Canada Remote Systems. Toronto, Ontario NorthAmeriNet Host
dnichols@ceilidh.beartrack.com (DoN Nichols) (06/16/91)
In article <1991Jun11.035945.8760@chinet.chi.il.us> larry@chinet.chi.il.us (Larry DeMar) writes: >One of the two chips (6802 or 6808) has internal ram also but I >don't remember which is which. The 6802 is the one that had the ram (128 or 256 bytes, I forget which). I used it to make a IEEE488-to-Diablo controller for a friend to hook his bare-bones Diablo to his PET. -- Donald Nichols (DoN.) | Voice (Days): (703) 664-1585 D&D Data | Voice (Eves): (703) 938-4564 Disclaimer: from here - None | Email: <dnichols@ceilidh.beartrack.com> --- Black Holes are where God is dividing by zero ---