3 Jul
1997
3 Jul
'97
9:44 a.m.
In message <199707031310.GAA04318(a)mx5.u.washington.edu> classiccmp(a)u.washington.edu
writes:
-tony
I got more into the guts of the HP-71, which was a
20-bit, nybble-oriented.
It had a Saturn chip (I think), on which I programmed in FORTH. A FORTH
chip was talked about for the HP-41 (never heard it called a coco, though)
but I don't know if it jelled.
'Coconut' was certainly the code-name for the HP41
I also like the HP71B. They're very easy to find in the UK at the moment, and
tend to sell for about \pounds 20.00. Forth/assembler ROMs are a lot rarer,
though, but the built-in Basic is quite nice.
I was very lucky - I managed to obtain all the technical docs on the HP71B,
including a commented source of the ROMs. It's a very interesting machine
internally. The Saturn (which is used in a lot of later HP handhelds,
including the HP48 family) is a strange chip. I'd not call it 20 bit, though.
Addresses (nybble addresses!) are 20 bits, most registers are 64 bits, and the
ALU is (I think) 4 bits. Call it whatever size you like.
5 Jul
5 Jul
4:59 a.m.
New subject: HP71B
Hello -
I hope you are the Tony Duell that posted this. If you are not, please accept my
apology and ignore this message.
I have a HP-71 with the FORTH ROM. I am interested in getting a copy of the
technical docs. Do you know of any source for them? Or, assuming no copyright
infringements, would you be willing to make a copy? Another option would be for
me to make a copy and return the originals to you.
Do you know of any HP 42 calculators for sale?
I also have one BIG favor to ask. I am trying to get a subscription to two
magazines published in the UK: Elektor Electronics and Electronics and Wireless
World. Could I send you the money to purchase a copy of each for me?
Thanks for your time.
John
In message <199707031310.GAA04318(a)mx5.u.washington.edu> classiccmp(a)u.washington.edu
writes:
-tony
--
***********************************************************************
* John Ott * Email: ott(a)saturn.ee.nd.edu *
* Dept. Electrical Engineering * *
* 275 Fitzpatrick Hall * *
* University of Notre Dame * Phone: (219) 631-7752 *
* Notre Dame, IN 46556 USA * *
***********************************************************************
I got more into the guts of the HP-71, which was
a 20-bit, nybble-oriented.
It had a Saturn chip (I think), on which I programmed in FORTH. A FORTH
chip was talked about for the HP-41 (never heard it called a coco, though)
but I don't know if it jelled.
'Coconut' was certainly the code-name for the HP41
I also like the HP71B. They're very easy to find in the UK at the moment, and
tend to sell for about \pounds 20.00. Forth/assembler ROMs are a lot rarer,
though, but the built-in Basic is quite nice.
I was very lucky - I managed to obtain all the technical docs on the HP71B,
including a commented source of the ROMs. It's a very interesting machine
internally. The Saturn (which is used in a lot of later HP handhelds,
including the HP48 family) is a strange chip. I'd not call it 20 bit, though.
Addresses (nybble addresses!) are 20 bits, most registers are 64 bits, and the
ALU is (I think) 4 bits. Call it whatever size you like.
10032
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ard＠p850ug1.demon.co.uk -
jott＠maddog.ee.nd.edu