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C64 -> Serial -> IBM ?

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Earle F. Philhower III

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Nov 29, 1993, 12:07:18 PM11/29/93
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Has anyone built a RS232 level converter for the C64 (convert +5v <-> +12V on Tx, Rx)?
Is it as simple as it would seem?
Do I just need to hook up a 1488 & 1489 w/the proper voltage supplies, or do I need
to do some black magic?

(I just tried X1541, to no avail. It probably won't work on my funky laptop parallel
port!)

Any help MUCH appreciated!

Earle F. Philhower III
ephi...@motown.ge.com <<-- Preferred
st91...@dunx1.ocs.drexel.edu <- Alternate
ahma...@duvm.ocs.drexel.edu < Last Ditch Effort

William L. Mays, X3448

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Dec 1, 1993, 5:46:29 PM12/1/93
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Yes, it is that simple, IF you do not need any hardware handshake
at either end. Need to use X-ON/X-OFF flow control ("three wire")
or you may need to use converter chips for 2 or 3 more signals.

Give me a call sometime, main plant ext 3448.
---
Speaking only for myself: Bill Mays
\ / WM...@MOTOWN.GE.COM
\/
/\ Same place, same job,
/ \ my mark. third company.


Jonathan Harris

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Dec 2, 1993, 1:29:19 PM12/2/93
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In article <2dj6s5$h...@cnn.MOTOWN.GE.COM>, wm...@motown.ge.com (William L. Mays, X3448) writes:
> Yes, it is that simple, IF you do not need any hardware handshake
> at either end. Need to use X-ON/X-OFF flow control ("three wire")
> or you may need to use converter chips for 2 or 3 more signals.

Could you elaborate for a real C64 novice? Like which pins go where etc.


> Give me a call sometime, main plant ext 3448.

That's not really an option for me!

--
Jonathan Harris (CS4) blob
jh...@dcs.ed.ac.uk
Department of Computer Science, University of Edinburgh, Scotland.

Andreas Boose

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Dec 3, 1993, 4:18:00 PM12/3/93
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EPHI...@MOTOWN.GE.COM writes:

>Has anyone built a RS232 level converter for the C64 (convert +5v <-> +12V on
>Tx, Rx)? Is it as simple as it would seem?
>Do I just need to hook up a 1488 & 1489 w/the proper voltage supplies, or do
>I need to do some black magic?

This is a very simple circuit I often used,
it needs only a 5V power supply:

Userport C64 C64 RS232
_________
| |
PA2 M-----------11-| |-14------------------- TXD (2)
PB1 D-----------10-| |--7------------------- RTS (4)
PB6 K-----------12-| MAX 232 |-13------------------- CTS (5)
FLAG2 B---X--------9-| |--8------------------- RXD (3)
PB0 C---| | |--3--|+-|
VCC 2-----------16-| |--1-----| DB25-connector
GND N------X----15-| |
X--|+-2-| |--5--|+-|
X--+|-6-|_________|--4-----|
|
|---------------------------------------- GND (7)

-|+- capacitor 22uF/16V
- +

Andreas

## CrossPoint v2.92 R ##


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