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Videx vs chinesium videx clones [message #347440] Mon, 03 July 2017 17:01 Go to next message
Anonymous
Karma:
Originally posted by: Jorge

I have a question:

Why is it that the Videx original only works in slot 3 but all the chinesium clones work in any slot? *Cn00L with the Videx gives garbage (but always the same garbage as if it was reading the wrong page into the ROM) for anything but slot n=3. I've got several videx and all of them do the same... Grrr !

Any ideas?

Thanks,
--
Jorge.
Re: Videx vs chinesium videx clones [message #347450 is a reply to message #347440] Tue, 04 July 2017 12:29 Go to previous messageGo to next message
Michael J. Mahon is currently offline  Michael J. Mahon
Messages: 1767
Registered: October 2012
Karma: 0
Senior Member
Jorge <jorge@jorgechamorro.com> wrote:
> I have a question:
>
> Why is it that the Videx original only works in slot 3 but all the
> chinesium clones work in any slot? *Cn00L with the Videx gives garbage
> (but always the same garbage as if it was reading the wrong page into the
> ROM) for anything but slot n=3. I've got several videx and all of them do
> the same... Grrr !
>
> Any ideas?
>
> Thanks,

Perhaps because slot 3 was already the "standard" slot for 80-column
output, the Videx firmware was written to assume residence in slot 3.

There is some penalty in code and complexity to make a card
slot-independent.

--
-michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
Re: Videx vs chinesium videx clones [message #347455 is a reply to message #347440] Tue, 04 July 2017 14:31 Go to previous messageGo to next message
David Schmenk is currently offline  David Schmenk
Messages: 374
Registered: December 2012
Karma: 0
Senior Member
On Monday, 3 July 2017 14:01:27 UTC-7, Jorge wrote:
> I have a question:
>
> Why is it that the Videx original only works in slot 3 but all the chinesium clones work in any slot? *Cn00L with the Videx gives garbage (but always the same garbage as if it was reading the wrong page into the ROM) for anything but slot n=3. I've got several videx and all of them do the same.... Grrr !
>
> Any ideas?
>
> Thanks,
> --
> Jorge.

Regardless wether the ROM was meant to work in slot 3 or not (I don't recall seeing any slot 3 specific code in the Video ROM), you should still be able to list it in the slot specific ROM address - assuming the qualify the ROM access with /IO-SELECT (can't imagine why they wouldn't). Do you still see the ROM at $C300 even when it's plugged in to a different slot?
Re: Videx vs chinesium videx clones [message #347456 is a reply to message #347450] Tue, 04 July 2017 15:03 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Tuesday, July 4, 2017 at 6:29:15 PM UTC+2, Michael J. Mahon wrote:
> Jorge wrote:
>> I have a question:
>>
>> Why is it that the Videx original only works in slot 3 but all the
>> chinesium clones work in any slot? *Cn00L with the Videx gives garbage
>> (but always the same garbage as if it was reading the wrong page into the
>> ROM) for anything but slot n=3. I've got several videx and all of them do
>> the same... Grrr !
>>
>> Any ideas?
>>
>> Thanks,
>
> Perhaps because slot 3 was already the "standard" slot for 80-column
> output, the Videx firmware was written to assume residence in slot 3.
>
> There is some penalty in code and complexity to make a card
> slot-independent.

If I put a chinese clone in slot 2 and an original Videx in slot 3 and do *C300<C200.C2FFV all bytes match ( if I recall correctly ).
Re: Videx vs chinesium videx clones [message #347457 is a reply to message #347455] Tue, 04 July 2017 15:07 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Tuesday, July 4, 2017 at 8:31:11 PM UTC+2, David Schmenk wrote:
> On Monday, 3 July 2017 14:01:27 UTC-7, Jorge wrote:
>> I have a question:
>>
>> Why is it that the Videx original only works in slot 3 but all the chinesium clones work in any slot? *Cn00L with the Videx gives garbage (but always the same garbage as if it was reading the wrong page into the ROM) for anything but slot n=3. I've got several videx and all of them do the same.... Grrr !
>>
>> Any ideas?
>>
>> Thanks,
>> --
>> Jorge.
>
> Regardless wether the ROM was meant to work in slot 3 or not (I don't recall seeing any slot 3 specific code in the Video ROM), you should still be able to list it in the slot specific ROM address - assuming the qualify the ROM access with /IO-SELECT (can't imagine why they wouldn't). Do you still see the ROM at $C300 even when it's plugged in to a different slot?

I have not checked that, but will do asap and let you know. But I guess the answer is going to be no...

The Videx cards have a bunch of "jumpers" without pins, those of the kind that you have to cut the copper and/or bridge by soldering, I wonder if they may have something to do with this.
Re: Videx vs chinesium videx clones [message #347642 is a reply to message #347455] Thu, 06 July 2017 17:12 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Tuesday, July 4, 2017 at 8:31:11 PM UTC+2, David Schmenk wrote:
>
> Regardless wether the ROM was meant to work in slot 3 or not (I don't recall seeing any slot 3 specific code in the Video ROM), you should still be able to list it in the slot specific ROM address - assuming the qualify the ROM access with /IO-SELECT (can't imagine why they wouldn't). Do you still see the ROM at $C300 even when it's plugged in to a different slot?

Now I've checked that:

The Cnxx ROM is only visible in the slot the card is plugged in, as it should be, and the C800..CFFF ROM is enabled properly after an access to Cnxx.

Anf the funny things I've discovered so far are:

1.- If the card (and I've got several Videx and all of them do the same) is plugged in an even numbered slot (2,4 or 6) the code I see @ Cn00L is the wrong page. (The previous page of what it ought to be it seems).

2.- In slots 1,3,5 and 7, the code I see @ Cn00L is ok, BUT, the card only works in slot 3, e.g., if I do a C100G or a 1 ctrl-P or a PR#1 it doesn't work and hangs the a2 and I have to reset to recover.

3.- The Videoterm Reference manual says clearly that you can plug it in any slot, but it also says clearly a few pages later that you must plug it in slot 3... Wahaha.

I have several apple IIs, IIes and platinums and all the Videx in all of them behave the same so it's not the apple II.

Also, the ROM in the Videx is a 2708 (unlike the chinese which have 2716s) and that needs (or so it seems) +12v at some pin which I don't remember now, so... if you swap it and put a 2716... you fry it. Whahaha, great!

Any ideas?
Thanks,
--
Jorge.
Re: Videx vs chinesium videx clones [message #347647 is a reply to message #347642] Thu, 06 July 2017 18:22 Go to previous messageGo to next message
David Schmenk is currently offline  David Schmenk
Messages: 374
Registered: December 2012
Karma: 0
Senior Member
On Thursday, 6 July 2017 14:12:11 UTC-7, Jorge wrote:
> On Tuesday, July 4, 2017 at 8:31:11 PM UTC+2, David Schmenk wrote:
>>
>> Regardless wether the ROM was meant to work in slot 3 or not (I don't recall seeing any slot 3 specific code in the Video ROM), you should still be able to list it in the slot specific ROM address - assuming the qualify the ROM access with /IO-SELECT (can't imagine why they wouldn't). Do you still see the ROM at $C300 even when it's plugged in to a different slot?
>
> Now I've checked that:
>
> The Cnxx ROM is only visible in the slot the card is plugged in, as it should be, and the C800..CFFF ROM is enabled properly after an access to Cnxx..
>
> Anf the funny things I've discovered so far are:
>
> 1.- If the card (and I've got several Videx and all of them do the same) is plugged in an even numbered slot (2,4 or 6) the code I see @ Cn00L is the wrong page. (The previous page of what it ought to be it seems).
>
> 2.- In slots 1,3,5 and 7, the code I see @ Cn00L is ok, BUT, the card only works in slot 3, e.g., if I do a C100G or a 1 ctrl-P or a PR#1 it doesn't work and hangs the a2 and I have to reset to recover.
>
> 3.- The Videoterm Reference manual says clearly that you can plug it in any slot, but it also says clearly a few pages later that you must plug it in slot 3... Wahaha.
>
> I have several apple IIs, IIes and platinums and all the Videx in all of them behave the same so it's not the apple II.
>
> Also, the ROM in the Videx is a 2708 (unlike the chinese which have 2716s) and that needs (or so it seems) +12v at some pin which I don't remember now, so... if you swap it and put a 2716... you fry it. Whahaha, great!
>
> Any ideas?
> Thanks,
> --
> Jorge.

Well, this got my curious. I admit I've never had my Videx in any slot other than 3. So I pulled out my bench ][+ and Videoterm with ROM v 2.3 and plugged it in. Slot 3 worked like a champ. And none of the other slots worked. It acted like it did something, but no video or keyboard response. I was able to see the per-slot ROM in each slot as I would have expected, but it just wouldn't work.

The manual said any slot should be functional, but slot 3 would only work with Pascal and CP/M, as expected. Maybe the earlier ROMs worked in any slot, but not 2.3?
Re: Videx vs chinesium videx clones [message #347657 is a reply to message #347647] Thu, 06 July 2017 19:59 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Friday, July 7, 2017 at 12:22:52 AM UTC+2, David Schmenk wrote:
>
> Well, this got my curious. I admit I've never had my Videx in any slot other than 3. So I pulled out my bench ][+ and Videoterm with ROM v 2.3 and plugged it in. Slot 3 worked like a champ. And none of the other slots worked. It acted like it did something, but no video or keyboard response. I was able to see the per-slot ROM in each slot as I would have expected, but it just wouldn't work.
>
> The manual said any slot should be functional, but slot 3 would only work with Pascal and CP/M, as expected. Maybe the earlier ROMs worked in any slot, but not 2.3?

But, do you see the same code in Cnxx in even and odd slots? I don't, in odd numbered slots a Cn00L begins with a BIT something but in even slots shows something else entirely... ?
Re: Videx vs chinesium videx clones [message #347707 is a reply to message #347657] Fri, 07 July 2017 10:49 Go to previous messageGo to next message
David Schmenk is currently offline  David Schmenk
Messages: 374
Registered: December 2012
Karma: 0
Senior Member
On Thursday, 6 July 2017 16:59:11 UTC-7, Jorge wrote:
> On Friday, July 7, 2017 at 12:22:52 AM UTC+2, David Schmenk wrote:
>>
>> Well, this got my curious. I admit I've never had my Videx in any slot other than 3. So I pulled out my bench ][+ and Videoterm with ROM v 2.3 and plugged it in. Slot 3 worked like a champ. And none of the other slots worked. It acted like it did something, but no video or keyboard response. I was able to see the per-slot ROM in each slot as I would have expected, but it just wouldn't work.
>>
>> The manual said any slot should be functional, but slot 3 would only work with Pascal and CP/M, as expected. Maybe the earlier ROMs worked in any slot, but not 2.3?
>
> But, do you see the same code in Cnxx in even and odd slots? I don't, in odd numbered slots a Cn00L begins with a BIT something but in even slots shows something else entirely... ?

I'm away over the weekend so I'll check when I get back. It looked like similar code in each slot, but I'll verify.
Re: Videx vs chinesium videx clones [message #347724 is a reply to message #347642] Fri, 07 July 2017 13:38 Go to previous messageGo to next message
Patrick Schaefer is currently offline  Patrick Schaefer
Messages: 67
Registered: October 2012
Karma: 0
Member
Am 06.07.2017 23:12 schrieb Jorge:

> 1.- If the card (and I've got several Videx and all of them do the
> same) is plugged in an even numbered slot (2,4 or 6) the code I
> see @ Cn00L is the wrong page. (The previous page of what it ought
> to be it seems).

Have a look at the Videoterm schematic. Address lines A0..A8 are
connected directly to the EPROM. A0..A7 is what makes the "00" of $Cn00.
And A8 -- oops -- is the lowest part of the "n". Whenever A8 is low
during the /IOSEL access (which is the case for the even-numbered
slots), you will get the wrong page.

To fix this, A8 would have to be ORed with /(/IOSEL). Similar to that
printer card: http://john.ccac.rwth-aachen.de:8000/patrick/data/Printer.pd f


> 3.- The Videoterm Reference manual says clearly that you can plug it
> in any slot, but it also says clearly a few pages later that you must
> plug it in slot 3... Wahaha.

And you can get it in any color, as long as it is green ;-)


Patrick
Re: Videx vs chinesium videx clones [message #347741 is a reply to message #347724] Fri, 07 July 2017 17:34 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: R.Kiefer.SPAEM

Patrick Schaefer wrote:

> To fix this, A8 would have to be ORed with /(/IOSEL). Similar to that
> printer card: http://john.ccac.rwth-aachen.de:8000/patrick/data/Printer.pd f

Jorge, do you mean the card you asked for the missing chips two weeks
ago? You added at one position a 74LS02. Probably you should think about
that .....

- Ralf
Re: Videx vs chinesium videx clones [message #348143 is a reply to message #347741] Wed, 12 July 2017 21:44 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Friday, July 7, 2017 at 11:34:18 PM UTC+2, Ralf Kiefer wrote:
>
> Jorge, do you mean the card you asked for the missing chips two weeks
> ago? You added at one position a 74LS02. Probably you should think about
> that .....
>

Hi Ralf !

That one is working fine... in any slot :-) only the genuine Videx-es fail. Here's the thing:

In the beginning... all the Videx-es worked fine in any slot, that much I know for sure because I had one that I've lost and I checked that one in other slots many years ago. Even the original 1980 Videx reference manual first edition says:

Page 2-3: "[...] The Videoterm board may go into any of the other slots [...]"

Then, later, in the fourth edition (1982) reference manual, on page "IX" says:

"IMPORTANT NOTICE: THE VIDEOTERM MUST NOW BE PLACED ONLY IN SLOT 3" and more:

http://imgur.com/a/IoVVd

So I think I need to find an old EPROM if I want to use them in other slots, or make one because the complete ROM listings come in the reference manuals.

--
Jorge.
Re: Videx vs chinesium videx clones [message #348257 is a reply to message #348143] Thu, 13 July 2017 16:12 Go to previous messageGo to next message
Patrick Schaefer is currently offline  Patrick Schaefer
Messages: 67
Registered: October 2012
Karma: 0
Member
Am 13.07.2017 03:44 schrieb Jorge:

> So I think I need to find an old EPROM if I want to use them in other
> slots, or make one because the complete ROM listings come in the
> reference manuals.

If you want to be independent of the level at addess line A8, you'll
need an EPROM with the same data in the pages $2xx and $3xx.

As explained before, Videx connected A8 directly to the EPROM, which
means /IOSEL selects EPROM page $3xx for Slot 1, 3, 5, 7 and page $2xx
for Slot 2, 4, 6.


Patrick
Re: Videx vs chinesium videx clones [message #348265 is a reply to message #348257] Thu, 13 July 2017 17:49 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Thursday, July 13, 2017 at 10:12:41 PM UTC+2, Patrick Schaefer wrote:
> Am 13.07.2017 03:44 schrieb Jorge:
>
>> So I think I need to find an old EPROM if I want to use them in other
>> slots, or make one because the complete ROM listings come in the
>> reference manuals.
>
> If you want to be independent of the level at addess line A8, you'll
> need an EPROM with the same data in the pages $2xx and $3xx.
>
> As explained before, Videx connected A8 directly to the EPROM, which
> means /IOSEL selects EPROM page $3xx for Slot 1, 3, 5, 7 and page $2xx
> for Slot 2, 4, 6.
>
>
> Patrick

Yes, yes, I know, looking at the ROM listing in the first edition of the reference manual there are two entry points in two succesive pages. I'll just have to copy that listing by hand into another EPROM, I think.

Thanks,
--
Jorge.
Re: Videx vs chinesium videx clones [message #348273 is a reply to message #348265] Thu, 13 July 2017 18:55 Go to previous messageGo to next message
Patrick Schaefer is currently offline  Patrick Schaefer
Messages: 67
Registered: October 2012
Karma: 0
Member
Am 13.07.2017 23:49 schrieb Jorge:

> Yes, yes, I know, looking at the ROM listing in the first edition of
> the reference manual there are two entry points in two succesive
> pages. I'll just have to copy that listing by hand into another EPROM,
> I think.

2708 are not very common today. You can use a 2716 instead, if you bend
pin 19 and 21 outside the socket. Pin 21 (Vpp) of the chip should to be
connected to Pin 24 (Vcc), Pin 19 (A10) to Pin 12 (Gnd).

Leaving both pins unconnected might also work if you burn the data two
times, starting at $000 and at $400 (so that A10 is don't care).


Patrick
Re: Videx vs chinesium videx clones [message #348288 is a reply to message #348265] Thu, 13 July 2017 20:30 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: James Davis

Hi Jorge,

I have a Videx-UltraTerm REV.C CARD for sale as is, if you are interested: https://groups.google.com/forum/#!topic/comp.sys.apple2.mark etplace/sj2KiKimgOs

James Davis
Re: Videx vs chinesium videx clones [message #348289 is a reply to message #348288] Thu, 13 July 2017 21:10 Go to previous messageGo to next message
David Schmenk is currently offline  David Schmenk
Messages: 374
Registered: December 2012
Karma: 0
Senior Member
On Thursday, 13 July 2017 17:30:57 UTC-7, James Davis wrote:
> Hi Jorge,
>
> I have a Videx-UltraTerm REV.C CARD for sale as is, if you are interested: https://groups.google.com/forum/#!topic/comp.sys.apple2.mark etplace/sj2KiKimgOs
>
> James Davis

^^^^^^^^^^^^^^^^^^^^^^^
That's the one you want!
Re: Videx vs chinesium videx clones [message #348312 is a reply to message #348288] Fri, 14 July 2017 04:08 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Friday, July 14, 2017 at 2:30:57 AM UTC+2, James Davis wrote:
> Hi Jorge,
>
> I have a Videx-UltraTerm REV.C CARD for sale as is, if you are interested: https://groups.google.com/forum/#!topic/comp.sys.apple2.mark etplace/sj2KiKimgOs
>
> James Davis

I'd love to have one of these beautys, yes, of course! PM me at jorge at jorgechamorro dot com please.

I have always wanted to cannibalize one of these wide screen things:

http://www.ebay.com/itm/282491035184

To use it with a Videx... hahaha, how cool is that? Even more reason yet to want to do that with an Ultraterm.

Magnavox and Brother word processors, and the hp 87 and 2764a, all have those cool wide format CRTs.

--
Jorge.
Re: Videx vs chinesium videx clones [message #348375 is a reply to message #348312] Fri, 14 July 2017 14:13 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: James Davis

On Friday, July 14, 2017 at 1:08:45 AM UTC-7, Jorge wrote:
> On Friday, July 14, 2017 at 2:30:57 AM UTC+2, James Davis wrote:
>> Hi Jorge,
>>
>> I have a Videx-UltraTerm REV.C CARD for sale as is, if you are interested: https://groups.google.com/forum/#!topic/comp.sys.apple2.mark etplace/sj2KiKimgOs
>>
>> James Davis
>
> I'd love to have one of these beautys, yes, of course! PM me at jorge at jorgechamorro dot com please.
>
> I have always wanted to cannibalize one of these wide screen things:
>
> http://www.ebay.com/itm/282491035184
>
> To use it with a Videx... hahaha, how cool is that? Even more reason yet to want to do that with an Ultraterm.
>
> Magnavox and Brother word processors, and the hp 87 and 2764a, all have those cool wide format CRTs.
>
> --
> Jorge.

OK Jorge,

So, if you are really interested and not broke, go to this link < https://groups.google.com/forum/#!topic/comp.sys.apple2.mark etplace/sj2KiKimgOs>, read what it says about placing a bid on the Videx-UltraTerm REV.C CARD I have for sale, and email your bid to me via the 'reply privately' link there.

James Davis
Re: Videx vs chinesium videx clones [message #348426 is a reply to message #348289] Sat, 15 July 2017 02:29 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Friday, July 14, 2017 at 3:10:07 AM UTC+2, David Schmenk wrote:
> On Thursday, 13 July 2017 17:30:57 UTC-7, James Davis wrote:
>>
>> I have a Videx-UltraTerm REV.C CARD for sale
>
> ^^^^^^^^^^^^^^^^^^^^^^^
> That's the one you want!

It seems that card needs a monitor with long persistance phophor (P39?) because in order to generate the high resolution modes it uses the interlaced mode of the 6845 in which scan lines are only updated at half the normal update rate.

I can do that too with any Videx or clone with a couple of POKEs, BTW, but the flicker you get is annoying.
Re: Videx vs chinesium videx clones [message #348427 is a reply to message #348375] Sat, 15 July 2017 02:31 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Friday, July 14, 2017 at 8:13:28 PM UTC+2, James Davis wrote:
> On Friday, July 14, 2017 at 1:08:45 AM UTC-7, Jorge wrote:
>> On Friday, July 14, 2017 at 2:30:57 AM UTC+2, James Davis wrote:
>>> Hi Jorge,
>>>
>>> I have a Videx-UltraTerm REV.C CARD for sale as is, if you are interested: https://groups.google.com/forum/#!topic/comp.sys.apple2.mark etplace/sj2KiKimgOs
>>>
>>> James Davis
>>
>> I'd love to have one of these beautys, yes, of course! PM me at jorge at jorgechamorro dot com please.
>>
>> I have always wanted to cannibalize one of these wide screen things:
>>
>> http://www.ebay.com/itm/282491035184
>>
>> To use it with a Videx... hahaha, how cool is that? Even more reason yet to want to do that with an Ultraterm.
>>
>> Magnavox and Brother word processors, and the hp 87 and 2764a, all have those cool wide format CRTs.
>>
>> --
>> Jorge.
>
> OK Jorge,
>
> So, if you are really interested and not broke, go to this link < https://groups.google.com/forum/#!topic/comp.sys.apple2.mark etplace/sj2KiKimgOs>, read what it says about placing a bid on the Videx-UltraTerm REV.C CARD I have for sale, and email your bid to me via the 'reply privately' link there.
>
> James Davis

It seems I'll need to buy a long persistance monitor before... :-/

--
Jorge.
Re: Videx vs chinesium videx clones [message #348428 is a reply to message #348273] Sat, 15 July 2017 02:59 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Jorge

On Friday, July 14, 2017 at 12:55:49 AM UTC+2, Patrick Schaefer wrote:
> Am 13.07.2017 23:49 schrieb Jorge:
>
>> Yes, yes, I know, looking at the ROM listing in the first edition of
>> the reference manual there are two entry points in two succesive
>> pages. I'll just have to copy that listing by hand into another EPROM,
>> I think.
>
> 2708 are not very common today. You can use a 2716 instead, if you bend
> pin 19 and 21 outside the socket. Pin 21 (Vpp) of the chip should to be
> connected to Pin 24 (Vcc), Pin 19 (A10) to Pin 12 (Gnd).
>
> Leaving both pins unconnected might also work if you burn the data two
> times, starting at $000 and at $400 (so that A10 is don't care).

Yes, I've done something like that in the past a few times to replace F8 ROMs with 2716s. Will keep an extra eye on the 2708 +12v pin this time to make sure I don't fry any more 2716s...

The Videoterm maps half the IOStrobe c800.cfff space to ROM and half to RAM, IIRC.

Thanks!
--
Jorge.
Re: Videx vs chinesium videx clones [message #348434 is a reply to message #348426] Sat, 15 July 2017 06:56 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: R.Kiefer.SPAEM

Jorge wrote:

> It seems that card needs a monitor with long persistance phophor (P39?)
> because in order to generate the high resolution modes it uses the
> interlaced mode of the 6845 in which scan lines are only updated at half
> the normal update rate.

The Apple /// monitor.

- Ralf
Re: Videx vs chinesium videx clones [message #348455 is a reply to message #348434] Sat, 15 July 2017 13:42 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Tom Porter

I was almost finished with a VID-X driver so those people could make or create specific VIDEX games like PONG or whatever... the guy from Brazil I was working with finally got a IIE and didn't need such a driver, so the work stopped. If memory serves me right, we got PLOT and the X,Y down pat, and was just about finished with SCRN but didn't finish... If someone wants to work with me (just test code)... we could finish it and them make a few games for it...
Re: Videx vs chinesium videx clones [message #348456 is a reply to message #348455] Sat, 15 July 2017 13:42 Go to previous messageGo to next message
Anonymous
Karma:
Originally posted by: Tom Porter

We've got a new file called VIDTERM.INF!

This is your new video driver.

It currently has PLOT/UNPLOT & HLIN ON/HLIN OFF
and VLIN ON/OFF.

To use in basic, it replaces the following commands as stated:

PLOTS
OLD: COLOR=1:PLOT X,Y
NEW: CALL 30000,X,Y
---
OLD: COLOR=0:PLOT X,Y
NEW: CALL 30020,X,Y

HLIN
OLD: COLOR=1:HLIN X1,X2 AT Y
NEW: CALL 30050,X1,X2,Y
---
OLD: COLOR=0:HLIN X1,X2 AT Y
NEW: CALL 30075,X1,X2,Y

VLIN
OLD: COLOR=1:VLIN Y1,Y2 AT X
NEW: CALL 30250,Y1,Y2,X
---
OLD: COLOR=0:VLIN Y1,Y2 AT X
NEW: CALL 30275,Y1,Y2,X

EXPLAINED ENTRY....

TO MAKE A VLIN AT 3,25 AT 8 JUST ENTER [ CALL 30250,3,25,8 ]
EVERYTHING HAS A COMMA BETWEEN IT...
PLOTS MUST HAVE 2 DATA PEICES
HLIN/VLIN MUST HAVE 3 DATA PEICES


I debugged it and went thru the code manually, should work fine, I hope?!?
There is no error checking, so if you enter a invalid parameter (out of screen bounds)
it will glitch on you, and do unpredictable things....

IF THE NEW PROGRAM.... [ CURSER2 ] works without glitches then the library is a-ok!
Re: Videx vs chinesium videx clones [message #348457 is a reply to message #348456] Sat, 15 July 2017 13:49 Go to previous message
Anonymous
Karma:
Originally posted by: Tom Porter

According to my notes... the above works... I don't have a VIDTERM so I cant 'test it today'... here is a copy of the driver/work I did on it.. I believe I was pretty close to having an SCRN, but its been a while.

https://www.dropbox.com/s/16ksx3li58l3aw6/Ricardo%205.40l.ds k?dl=0
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