test-drb November 1998

test-drb@ccmp.vtda.org

185 participants
940 discussions

6501 and 6500/1 (was Re: Revamped Web site up)

by rcini＠email.msn.com

OK, I looked at the data sheet: "The 6500/1 is a complete, high-performance 8-bit NMOS microcomputer on a single chip, ans it totally upward/downward software compatible with all members of the 6500 family." "The 6500/1 consists of a 6502 CPU, an internal clock oscillator, 2048 bytes of Read Only Memory (ROM), 64 bytes of Random Access Memory (RAM) and flexible interface circuitry. The interface circuitry includes a 16-bit programmable counter/latch with four operating modes, 32 bidirectional input/output lines (including two edge-sensitive lines), five interrupts and a counter I/O line." "Mask Programmable Options: Internal pull-up resistors on ports A, B, C, D. Selectable for 8-bit port groups only, not for individual port lines. Internal pull-up resistor on the CNTR line." Kind of sounds like a 6502 and a 6522 rolled together with a small ROM and some RAM. Other interesting tidbits: no mention of 6800 compatibility; separate power pin for the internal RAM; five interrupts include reset, NMI, two edge-sensitive, counter overflow. None of the data sheets that I have (not even the "family" ones) mention a 6501. Rich Cini/WUGNET - ClubWin!/CW7 - MCP Windows 95/Windows Networking - Collector of "classic" computers <========= reply separator ==========>

25 years, 8 months

Short Intro

by allisonp＠world.std.com

< Just curious if anyone remembers a magazine called "Kilobaud" - Seems < like it had a short life. Yes I remember it, mostly hardware bent and good too. Lasted at least four years. Allison

25 years, 8 months

OT: Very (sorry)... Hey! Digital camera going for $75

by manney＠lrbcg.com

www.fastmodems.com is selling Mitsubishi DJ-1000's for $75.

25 years, 8 months

WSJ Article posted (psst. don't tell Dow Jones & Co.)

by rcini＠email.msn.com

As promised: http://highgate.comm.sfu.ca/~rcini/classiccmp/pdf/wsj1030.pdf Don't try the link immediately...I'm uploading stuff later tonight. Rich Cini/WUGNET - ClubWin!/CW7 - MCP Windows 95/Windows Networking - Collector of "classic" computers <========= reply separator ==========>

25 years, 8 months

Revamped Web site up

by rcini＠email.msn.com

On Thu, 5 Nov 1998 14:28:21 +1, "Hans Franke" <franke(a)sbs.de> wrote: >>The 6500/x wasn't a clone at all - maybe a simplified design >>using the same philosophy about a CPU, but the 6500/1 >>(or 6501) did use the 6800 Bus _and_ was pin compatible, This is true. I looked in some other data that I have (I think in the Rockwell R6500 Hardware Book, I think), where it explicitly says that. Rich Cini/WUGNET - ClubWin!/CW7 - MCP Windows 95/Windows Networking - Collector of "classic" computers <========= reply separator ==========>

25 years, 8 months

MOS 6530's (Was: KIM-1 (Was: Apple I clone (was Apple I Computer

by dcoward＠pressstart.com

>> There was one version of one of the CBM disk drives (I think it was the >> 8252LP) where a 6530 was replaced by a daughtboard containing (I think) >> an 6532 + a ROM + TTL glue. I don't know how universal that solution is, >> but I guess something could be worked out. > >Jep, thats exactly the soulution I was suggesting. > Just grab one of these people that want to build a 64 bit Z80 computer or a IMSAI clone. Builting a 6530 daugther board should be a piece of cake for them. And as a hint, have them compare the schematics of the KIM with the schematics of the VIM or the SYM. They use 6532s. ========================================= Doug Coward Press Start Inc. Sunnyvale,CA =========================================

25 years, 8 months

Classics made the WSJ Again

by rcini＠email.msn.com

On Thu, 5 Nov 1998 07:40:18 EST, SUPRDAVE(a)aol.com wrote: >>everyone start scouring the thrift stores and radio rallies and buy up >>everything now! prices for old worthless computers shirley will go up now! ...and stop calling me Shirley! Rich Cini/WUGNET - ClubWin!/CW7 - MCP Windows 95/Windows Networking - Collector of "classic" computers <========= reply separator ==========>

25 years, 8 months

ePay revisited once more

by rhblake＠bigfoot.com

For those of you that are tired of hearing about the online auctions I exxpress my apologies. For those of you that use eBay to sell I need to express a little concern about their fee system so that you can watch your accounts. Seems I've had three items in the $25 to $1000 range sell and should have seen a 2.5% fee added as a "final value fee". Well an example is an item that sold for $242.50 at close. The fee listed is $6.69 rather than the 6.06 that 4 of my calculators ran up. I'm not an accountant but I know how to do percentages. The fee of 5% for items under $25 come up fine. I had two printers sell today and they are also wrong. One sold for $41.00 and has a fee of $1.65 rather than the 2.5% fee of $1.03 and the other sold at $31.27 with fee listed as $1.41 instead of the 2,5% fee of 78 cents. I've written eBay support but don't expect an answer until Monday. My whole point of this is to go back and check the fees on your items! You might very well be getting ripped without knowing it. Sure I'm only screwed on a buck or two but eBay is making out when you consider the volume sold every day. If 1000 items closed daily and each seller was overcharged 25 cents they'd have $250 more than they were supposed to. You get my point I hope and will now have the foreskin, er, foresight to check the account detail and their math. Thanks for the time in listening to my babble.

25 years, 8 months

NCR server

by CharlesII＠nwonline.net

Does anyone know anything about a NCR model 0202 server?

25 years, 8 months

PDP-11/23+ CPU needed...

by sethm＠loomcom.com

A non-text attachment was scrubbed... Name: not available Type: text Size: 587 bytes Desc: not available Url : http://www.classiccmp.org/pipermail/cctalk/attachments/19981106/52af9358/at…

25 years, 8 months

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test-drb November 1998