Twister Board
16 messages · 2002-08-10 → 2011-09-08 · Yahoo Group era · View archive on archive.org
Participants: Hector Jorge Picone, Don Dindang, Jack, Scott A. Rossell, yarek_com, Jarek Adamski, Jack, j1b3200, marcel.racine22, zxspectrum128
Attachments in thread: 1 (see the archive.org item)
Preserved from the Timex/Sinclair 2068 Yahoo Group (2001–2019), which is no longer online. Text reproduced from the archive.org archive; email addresses masked.
Messages
1. Twister Board
Hector Jorge Picone · Sat, 10 Aug 2002 21:00
Hi,
Anybody can help me?
I´m trying to made a twister board for my TS2068.
Most signals exist in ZX and TS.
But IORQGE ( IORQULA ) and ROSCS are present only in
ZX bus.
Which ones are TS equivalents ?
Thanks,
Hector Picone
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2. RE: [ts2068] Twister Board
Scott A. Rossell · Sat, 10 Aug 2002 23:38
ROSCS is pin 28A on the 2068 backplane and pin 35 on the dock connector.
I'm not sure about the other.
Hope that helps.
See TS2068 Technical Manual for details. You can download it from a handful
of web sites.
-----Original Message-----
From: Hector Jorge Picone [mailto:[email]]
Sent: Saturday, August 10, 2002 7:00 PM
To: [email]
Subject: [ts2068] Twister Board
Hi,
Anybody can help me?
I´m trying to made a twister board for my TS2068.
Most signals exist in ZX and TS.
But IORQGE ( IORQULA ) and ROSCS are present only in
ZX bus.
Which ones are TS equivalents ?
Thanks,
Hector Picone
_________________________________________________________
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3. Re: Twister Board
yarek_com · Sat, 14 Sep 2002 18:54
--- In ts2068@y..., Hector Jorge Picone <dunkel_piky@y...> wrote:
> Hi,
Hello!
> Anybody can help me?
> I´m trying to made a twister board for my TS2068.
> Most signals exist in ZX and TS.
> But IORQGE ( IORQULA ) and ROSCS are present only in
> ZX bus. Which ones are TS equivalents ?
It looks like TS2068 don't have them at all.
The /IORQGE is line connected directly to ULA
(as /IORQ - low state means port operation) and
through a resistor to /IORQ of Z80. So, pulling up
to +5V the /IORQGE results the ULA ports are disabled.
This is important mostly for the ZX Spectrum, where
ULA takes every even address. In TS2068 the ULA uses
only ports #F4, #F5, #F6, #FE and #FF, so most
interfaces will work without the need of /IORQGE
purpose.
The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
line that selects ROM in ZX Spectrum and is connected
through a resistor. So you can pull up to +5V the line
and the internal ROM is disabled. In TS2068 there are
2 ROMs that must be deactivated. As you want to use
ZX Spectrum devices, you need the ZX Spectrum Emulator
cartrige and its ROM must be disabled, too.
In the TC2068 the /ROMCS signal (when high) disables
both ROMs (HOME and EXROM - there are resistors and
diodes to do it) and the ROM in cartridge - using the
/BE signal in cartrigde slot.
So I suggest to connect the /ROMSC line on ZX side to
the /BE (A29 - top) line of TS2068 and ignore the
/IORQGE signal (unless you really need it - I can tell
you what changes inside the TS2068 are needed to get
that signal).
Yarek.
4. Re: Twister Board
Jarek Adamski · Sun, 15 Sep 2002 19:56
--- In ts2068@y..., "yarek_com" <zx@y...> wrote:
> So I suggest to connect the /ROMSC line on ZX side to
> the /BE (A29 - top) line of TS2068 (...)
And it looks like there must be an inverter between
/ROMCS of ZX side (input) and /BE (output).
A pnp transistor with a 5kom resistor on base schould
be fine, too... Emiter to +5V, collector to /BE...
I'll chceck it one more time...
Yarek.
5. Re: [ts2068] Re: Twister Board
Hector Jorge Picone · Sun, 15 Sep 2002 19:02
Yarek,
Thanks a lot for your kindly help.
Hector
--- yarek_com <[email]> escribió: > --- In
ts2068@y..., Hector Jorge Picone
> <dunkel_piky@y...> wrote:
> > Hi,
> Hello!
>
> > Anybody can help me?
> > I´m trying to made a twister board for my TS2068.
> > Most signals exist in ZX and TS.
> > But IORQGE ( IORQULA ) and ROSCS are present only
> in
> > ZX bus. Which ones are TS equivalents ?
> It looks like TS2068 don't have them at all.
>
> The /IORQGE is line connected directly to ULA
> (as /IORQ - low state means port operation) and
> through a resistor to /IORQ of Z80. So, pulling up
> to +5V the /IORQGE results the ULA ports are
> disabled.
> This is important mostly for the ZX Spectrum, where
> ULA takes every even address. In TS2068 the ULA uses
> only ports #F4, #F5, #F6, #FE and #FF, so most
> interfaces will work without the need of /IORQGE
> purpose.
>
> The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
> line that selects ROM in ZX Spectrum and is
> connected
> through a resistor. So you can pull up to +5V the
> line
> and the internal ROM is disabled. In TS2068 there
> are
> 2 ROMs that must be deactivated. As you want to use
> ZX Spectrum devices, you need the ZX Spectrum
> Emulator
> cartrige and its ROM must be disabled, too.
>
> In the TC2068 the /ROMCS signal (when high) disables
> both ROMs (HOME and EXROM - there are resistors and
> diodes to do it) and the ROM in cartridge - using
> the
> /BE signal in cartrigde slot.
>
> So I suggest to connect the /ROMSC line on ZX side
> to
> the /BE (A29 - top) line of TS2068 and ignore the
> /IORQGE signal (unless you really need it - I can
> tell
> you what changes inside the TS2068 are needed to get
> that signal).
>
> Yarek.
>
>
>
_________________________________________________________
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6. Re: [ts2068] Re: Twister Board
Hector Jorge Picone · Mon, 23 Dec 2002 09:56
I will start with this project next holidays....
I will comment any news about.
Merry Christmas and happy New Year in Peace!!!
( Jarek, thanks a lot )
Hector
--- Jarek Adamski <[email]> escribió: > --- In
ts2068@y..., "yarek_com" <zx@y...> wrote:
> > So I suggest to connect the /ROMSC line on ZX side
> to
> > the /BE (A29 - top) line of TS2068 (...)
> And it looks like there must be an inverter between
> /ROMCS of ZX side (input) and /BE (output).
>
> A pnp transistor with a 5kom resistor on base
> schould
> be fine, too... Emiter to +5V, collector to /BE...
>
> I'll chceck it one more time...
>
> Yarek.
>
>
>
_________________________________________________________
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7. Re: [ts2068] Re: Twister Board
Hector Jorge Picone · Sat, 1 Mar 2003 08:59:
Hello, TS lovers ( Yarek )
At ebay, art.3403803086 I found ( yesterday ) a "PCB
for Timex Sinclair 2068 Twister Board" ... Is that the
twister I was looking for time ago?
I can´t see any components in it....how can it get
differents voltages for the ZX bus ?
Help me...
Hector
--- yarek_com <[email]> escribió: > --- In
ts2068@y..., Hector Jorge Picone
> <dunkel_piky@y...> wrote:
> > Hi,
> Hello!
>
> > Anybody can help me?
> > I´m trying to made a twister board for my TS2068.
> > Most signals exist in ZX and TS.
> > But IORQGE ( IORQULA ) and ROSCS are present only
> in
> > ZX bus. Which ones are TS equivalents ?
> It looks like TS2068 don't have them at all.
>
> The /IORQGE is line connected directly to ULA
> (as /IORQ - low state means port operation) and
> through a resistor to /IORQ of Z80. So, pulling up
> to +5V the /IORQGE results the ULA ports are
> disabled.
> This is important mostly for the ZX Spectrum, where
> ULA takes every even address. In TS2068 the ULA uses
> only ports #F4, #F5, #F6, #FE and #FF, so most
> interfaces will work without the need of /IORQGE
> purpose.
>
> The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
> line that selects ROM in ZX Spectrum and is
> connected
> through a resistor. So you can pull up to +5V the
> line
> and the internal ROM is disabled. In TS2068 there
> are
> 2 ROMs that must be deactivated. As you want to use
> ZX Spectrum devices, you need the ZX Spectrum
> Emulator
> cartrige and its ROM must be disabled, too.
>
> In the TC2068 the /ROMCS signal (when high) disables
> both ROMs (HOME and EXROM - there are resistors and
> diodes to do it) and the ROM in cartridge - using
> the
> /BE signal in cartrigde slot.
>
> So I suggest to connect the /ROMSC line on ZX side
> to
> the /BE (A29 - top) line of TS2068 and ignore the
> /IORQGE signal (unless you really need it - I can
> tell
> you what changes inside the TS2068 are needed to get
> that signal).
>
> Yarek.
>
>
>
_________________________________________________________
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Información de Estados Unidos y América Latina, en Yahoo! Noticias.
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8. Re: [ts2068] Re: Twister Board
Don Dindang · Sat, 1 Mar 2003 18:44:
Hello Hector,
This PCB is just reorder the signal at TS2068 edge connector to be the
same order as ZX Spetrum edge connector. So no need any component.
Regards,
Watchara
Hector Jorge Picone <[email]> wrote:Hello, TS lovers ( Yarek )
At ebay, art.3403803086 I found ( yesterday ) a "PCB
for Timex Sinclair 2068 Twister Board" ... Is that the
twister I was looking for time ago?
I can�t see any components in it....how can it get
differents voltages for the ZX bus ?
Help me...
Hector
--- yarek_com <[email]> escribi�: > --- In
ts2068@y..., Hector Jorge Picone
> <dunkel_piky@y...> wrote:
> > Hi,
> Hello!
>
> > Anybody can help me?
> > I�m trying to made a twister board for my TS2068.
> > Most signals exist in ZX and TS.
> > But IORQGE ( IORQULA ) and ROSCS are present only
> in
> > ZX bus. Which ones are TS equivalents ?
> It looks like TS2068 don't have them at all.
>
> The /IORQGE is line connected directly to ULA
> (as /IORQ - low state means port operation) and
> through a resistor to /IORQ of Z80. So, pulling up
> to +5V the /IORQGE results the ULA ports are
> disabled.
> This is important mostly for the ZX Spectrum, where
> ULA takes every even address. In TS2068 the ULA uses
> only ports #F4, #F5, #F6, #FE and #FF, so most
> interfaces will work without the need of /IORQGE
> purpose.
>
> The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
> line that selects ROM in ZX Spectrum and is
> connected
> through a resistor. So you can pull up to +5V the
> line
> and the internal ROM is disabled. In TS2068 there
> are
> 2 ROMs that must be deactivated. As you want to use
> ZX Spectrum devices, you need the ZX Spectrum
> Emulator
> cartrige and its ROM must be disabled, too.
>
> In the TC2068 the /ROMCS signal (when high) disables
> both ROMs (HOME and EXROM - there are resistors and
> diodes to do it) and the ROM in cartridge - using
> the
> /BE signal in cartrigde slot.
>
> So I suggest to connect the /ROMSC line on ZX side
> to
> the /BE (A29 - top) line of TS2068 and ignore the
> /IORQGE signal (unless you really need it - I can
> tell
> you what changes inside the TS2068 are needed to get
> that signal).
>
> Yarek.
>
>
>
_________________________________________________________
Do You Yahoo!?
Informaci�n de Estados Unidos y Am�rica Latina, en Yahoo! Noticias.
Vis�tanos en http://noticias.espanol.yahoo.com
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9. Re: Twister Board
Jack · Sun, 02 Mar 2003 05:38
Hector,
I looked at the auction you mentioned and this does not look like
a "twister" to me. I have a Z-Link and Zebra super-twister and they
do have components as you mention. I'm not sure what these boards
are that the fellow is selling. These are male/male and a twister is
female/male. I did not see that these were really pcb's, there are
no places for components.
Jack
--- In [email], Hector Jorge Picone <dunkel_piky@y...>
wrote:
> Hello, TS lovers ( Yarek )
>
> At ebay, art.3403803086 I found ( yesterday ) a "PCB
> for Timex Sinclair 2068 Twister Board" ... Is that the
> twister I was looking for time ago?
> I can´t see any components in it....how can it get
> differents voltages for the ZX bus ?
> Help me...
>
> Hector
>
>
> --- yarek_com <zx@y...> escribió: > --- In
> ts2068@y..., Hector Jorge Picone
> > <dunkel_piky@y...> wrote:
> > > Hi,
> > Hello!
> >
> > > Anybody can help me?
> > > I´m trying to made a twister board for my TS2068.
> > > Most signals exist in ZX and TS.
> > > But IORQGE ( IORQULA ) and ROSCS are present only
> > in
> > > ZX bus. Which ones are TS equivalents ?
> > It looks like TS2068 don't have them at all.
> >
> > The /IORQGE is line connected directly to ULA
> > (as /IORQ - low state means port operation) and
> > through a resistor to /IORQ of Z80. So, pulling up
> > to +5V the /IORQGE results the ULA ports are
> > disabled.
> > This is important mostly for the ZX Spectrum, where
> > ULA takes every even address. In TS2068 the ULA uses
> > only ports #F4, #F5, #F6, #FE and #FF, so most
> > interfaces will work without the need of /IORQGE
> > purpose.
> >
> > The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
> > line that selects ROM in ZX Spectrum and is
> > connected
> > through a resistor. So you can pull up to +5V the
> > line
> > and the internal ROM is disabled. In TS2068 there
> > are
> > 2 ROMs that must be deactivated. As you want to use
> > ZX Spectrum devices, you need the ZX Spectrum
> > Emulator
> > cartrige and its ROM must be disabled, too.
> >
> > In the TC2068 the /ROMCS signal (when high) disables
> > both ROMs (HOME and EXROM - there are resistors and
> > diodes to do it) and the ROM in cartridge - using
> > the
> > /BE signal in cartrigde slot.
> >
> > So I suggest to connect the /ROMSC line on ZX side
> > to
> > the /BE (A29 - top) line of TS2068 and ignore the
> > /IORQGE signal (unless you really need it - I can
> > tell
> > you what changes inside the TS2068 are needed to get
> > that signal).
> >
> > Yarek.
> >
> >
> >
>
>
> _________________________________________________________
> Do You Yahoo!?
> Información de Estados Unidos y América Latina, en Yahoo! Noticias.
> Visítanos en http://noticias.espanol.yahoo.com
10. Re: [ts2068] Re: Twister Board
Hector Jorge Picone · Sun, 2 Mar 2003 07:40:
Dear TS Lovers,
Jack, Yarek, Don,
Thanks a lot for your opinions and support. I
think this PCB can help me to build a twister.
I can´t find it alone in ebay; all of them were
sold with disks I/F.
Thanks again, my friends.
Hector
_________________________________________________________
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11. Re: [ts2068] Re: Twister Board
Don Dindang · Sun, 2 Mar 2003 10:09: · 📎 1: file
Hector, Jack.
I asked the seller and he gave me the picture of finished board.(see attach file)
He told me that it work as Zebra super twister, there is 74LS138 on board for convert /ROMCS to /BE. He build it for use with Zebra FDD and have some extra PCBs
Hope this help,
Don
"Jack <[email]>" <[email]> wrote: Hector,
I looked at the auction you mentioned and this does not look like
a "twister" to me. I have a Z-Link and Zebra super-twister and they
do have components as you mention. I'm not sure what these boards
are that the fellow is selling. These are male/male and a twister is
female/male. I did not see that these were really pcb's, there are
no places for components.
Jack
--- In [email], Hector Jorge Picone <dunkel_piky@y...>
wrote:
> Hello, TS lovers ( Yarek )
>
> At ebay, art.3403803086 I found ( yesterday ) a "PCB
> for Timex Sinclair 2068 Twister Board" ... Is that the
> twister I was looking for time ago?
> I can�t see any components in it....how can it get
> differents voltages for the ZX bus ?
> Help me...
>
> Hector
>
>
> --- yarek_com <zx@y...> escribi�: > --- In
> ts2068@y..., Hector Jorge Picone
> > <dunkel_piky@y...> wrote:
> > > Hi,
> > Hello!
> >
> > > Anybody can help me?
> > > I�m trying to made a twister board for my TS2068.
> > > Most signals exist in ZX and TS.
> > > But IORQGE ( IORQULA ) and ROSCS are present only
> > in
> > > ZX bus. Which ones are TS equivalents ?
> > It looks like TS2068 don't have them at all.
> >
> > The /IORQGE is line connected directly to ULA
> > (as /IORQ - low state means port operation) and
> > through a resistor to /IORQ of Z80. So, pulling up
> > to +5V the /IORQGE results the ULA ports are
> > disabled.
> > This is important mostly for the ZX Spectrum, where
> > ULA takes every even address. In TS2068 the ULA uses
> > only ports #F4, #F5, #F6, #FE and #FF, so most
> > interfaces will work without the need of /IORQGE
> > purpose.
> >
> > The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
> > line that selects ROM in ZX Spectrum and is
> > connected
> > through a resistor. So you can pull up to +5V the
> > line
> > and the internal ROM is disabled. In TS2068 there
> > are
> > 2 ROMs that must be deactivated. As you want to use
> > ZX Spectrum devices, you need the ZX Spectrum
> > Emulator
> > cartrige and its ROM must be disabled, too.
> >
> > In the TC2068 the /ROMCS signal (when high) disables
> > both ROMs (HOME and EXROM - there are resistors and
> > diodes to do it) and the ROM in cartridge - using
> > the
> > /BE signal in cartrigde slot.
> >
> > So I suggest to connect the /ROMSC line on ZX side
> > to
> > the /BE (A29 - top) line of TS2068 and ignore the
> > /IORQGE signal (unless you really need it - I can
> > tell
> > you what changes inside the TS2068 are needed to get
> > that signal).
> >
> > Yarek.
> >
> >
> >
>
>
> _________________________________________________________
> Do You Yahoo!?
> Informaci�n de Estados Unidos y Am�rica Latina, en Yahoo! Noticias.
> Vis�tanos en http://noticias.espanol.yahoo.com
Yahoo! Groups SponsorADVERTISEMENT
To unsubscribe from this group, send an email to:
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12. Re: Twister Board
Jack · Mon, 03 Mar 2003 06:04
Don,
A twister, maybe, but it is not a super twister! The Zebra super
twister is female/male/male. One male for Spectrum, the other for
TS2068, peripherals. This is more like a Z-Link, female/male. It
can only use Spectrum peripherals, not TS2068!
Jack
--- In [email], Don Dindang <kmitl22@y...> wrote:
>
> Hector, Jack.
> I asked the seller and he gave me the picture of finished board.
(see attach file)
> He told me that it work as Zebra super twister, there is 74LS138 on
board for convert /ROMCS to /BE. He build it for use with Zebra FDD
and have some extra PCBs
> Hope this help,
> Don
> "Jack <jboatno4@o...>" <jboatno4@o...> wrote: Hector,
> I looked at the auction you mentioned and this does not look like
> a "twister" to me. I have a Z-Link and Zebra super-twister and
they
> do have components as you mention. I'm not sure what these boards
> are that the fellow is selling. These are male/male and a twister
is
> female/male. I did not see that these were really pcb's, there are
> no places for components.
>
> Jack
>
> --- In [email], Hector Jorge Picone
<dunkel_piky@y...>
> wrote:
> > Hello, TS lovers ( Yarek )
> >
> > At ebay, art.3403803086 I found ( yesterday ) a "PCB
> > for Timex Sinclair 2068 Twister Board" ... Is that the
> > twister I was looking for time ago?
> > I can´t see any components in it....how can it get
> > differents voltages for the ZX bus ?
> > Help me...
> >
> > Hector
> >
> >
> > --- yarek_com <zx@y...> escribió: > --- In
> > ts2068@y..., Hector Jorge Picone
> > > <dunkel_piky@y...> wrote:
> > > > Hi,
> > > Hello!
> > >
> > > > Anybody can help me?
> > > > I´m trying to made a twister board for my TS2068.
> > > > Most signals exist in ZX and TS.
> > > > But IORQGE ( IORQULA ) and ROSCS are present only
> > > in
> > > > ZX bus. Which ones are TS equivalents ?
> > > It looks like TS2068 don't have them at all.
> > >
> > > The /IORQGE is line connected directly to ULA
> > > (as /IORQ - low state means port operation) and
> > > through a resistor to /IORQ of Z80. So, pulling up
> > > to +5V the /IORQGE results the ULA ports are
> > > disabled.
> > > This is important mostly for the ZX Spectrum, where
> > > ULA takes every even address. In TS2068 the ULA uses
> > > only ports #F4, #F5, #F6, #FE and #FF, so most
> > > interfaces will work without the need of /IORQGE
> > > purpose.
> > >
> > > The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
> > > line that selects ROM in ZX Spectrum and is
> > > connected
> > > through a resistor. So you can pull up to +5V the
> > > line
> > > and the internal ROM is disabled. In TS2068 there
> > > are
> > > 2 ROMs that must be deactivated. As you want to use
> > > ZX Spectrum devices, you need the ZX Spectrum
> > > Emulator
> > > cartrige and its ROM must be disabled, too.
> > >
> > > In the TC2068 the /ROMCS signal (when high) disables
> > > both ROMs (HOME and EXROM - there are resistors and
> > > diodes to do it) and the ROM in cartridge - using
> > > the
> > > /BE signal in cartrigde slot.
> > >
> > > So I suggest to connect the /ROMSC line on ZX side
> > > to
> > > the /BE (A29 - top) line of TS2068 and ignore the
> > > /IORQGE signal (unless you really need it - I can
> > > tell
> > > you what changes inside the TS2068 are needed to get
> > > that signal).
> > >
> > > Yarek.
> > >
> > >
> > >
> >
> >
> > _________________________________________________________
> > Do You Yahoo!?
> > Información de Estados Unidos y América Latina, en Yahoo!
Noticias.
> > Visítanos en http://noticias.espanol.yahoo.com
>
>
> Yahoo! Groups SponsorADVERTISEMENT
>
> To unsubscribe from this group, send an email to:
> [email]
>
>
>
> Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service.
>
>
>
> ---------------------------------
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> Yahoo! Tax Center - forms, calculators, tips, and more
13. Re: Twister Board
Jack · Wed, 05 Mar 2003 06:05
Group,
I'd like to expand a little on the statement, "it can only use
Spectrum peripherals" that I made. The statement is true, however
things like the TS2040, Westridge 2050 and some other interfaces made
for the 2068 are Spectrum compatible so could be used with this
device, and, any peripheral with a through port of the buss could be
plugged on to the 2068 "first in line" with the twister plugged on to
that, then Spectrum items used with the twister. Some peripherals
may not work this way though due to conflicts in addressing. And
some just like to be the only device hooked to the computer.
Jack
--- In [email], "Jack <jboatno4@o...>" <jboatno4@o...>
wrote:
> Don,
>
> A twister, maybe, but it is not a super twister! The Zebra super
> twister is female/male/male. One male for Spectrum, the other for
> TS2068, peripherals. This is more like a Z-Link, female/male. It
> can only use Spectrum peripherals, not TS2068!
>
> Jack
> --- In [email], Don Dindang <kmitl22@y...> wrote:
> >
> > Hector, Jack.
> > I asked the seller and he gave me the picture of finished board.
> (see attach file)
> > He told me that it work as Zebra super twister, there is 74LS138
on
> board for convert /ROMCS to /BE. He build it for use with Zebra FDD
> and have some extra PCBs
> > Hope this help,
> > Don
> > "Jack <jboatno4@o...>" <jboatno4@o...> wrote: Hector,
> > I looked at the auction you mentioned and this does not look like
> > a "twister" to me. I have a Z-Link and Zebra super-twister and
> they
> > do have components as you mention. I'm not sure what these
boards
> > are that the fellow is selling. These are male/male and a
twister
> is
> > female/male. I did not see that these were really pcb's, there
are
> > no places for components.
> >
> > Jack
> >
> > --- In [email], Hector Jorge Picone
> <dunkel_piky@y...>
> > wrote:
> > > Hello, TS lovers ( Yarek )
> > >
> > > At ebay, art.3403803086 I found ( yesterday ) a "PCB
> > > for Timex Sinclair 2068 Twister Board" ... Is that the
> > > twister I was looking for time ago?
> > > I can´t see any components in it....how can it get
> > > differents voltages for the ZX bus ?
> > > Help me...
> > >
> > > Hector
> > >
> > >
> > > --- yarek_com <zx@y...> escribió: > --- In
> > > ts2068@y..., Hector Jorge Picone
> > > > <dunkel_piky@y...> wrote:
> > > > > Hi,
> > > > Hello!
> > > >
> > > > > Anybody can help me?
> > > > > I´m trying to made a twister board for my TS2068.
> > > > > Most signals exist in ZX and TS.
> > > > > But IORQGE ( IORQULA ) and ROSCS are present only
> > > > in
> > > > > ZX bus. Which ones are TS equivalents ?
> > > > It looks like TS2068 don't have them at all.
> > > >
> > > > The /IORQGE is line connected directly to ULA
> > > > (as /IORQ - low state means port operation) and
> > > > through a resistor to /IORQ of Z80. So, pulling up
> > > > to +5V the /IORQGE results the ULA ports are
> > > > disabled.
> > > > This is important mostly for the ZX Spectrum, where
> > > > ULA takes every even address. In TS2068 the ULA uses
> > > > only ports #F4, #F5, #F6, #FE and #FF, so most
> > > > interfaces will work without the need of /IORQGE
> > > > purpose.
> > > >
> > > > The /ROMCS (I think you meant /ROMCS, not /ROSCS) is
> > > > line that selects ROM in ZX Spectrum and is
> > > > connected
> > > > through a resistor. So you can pull up to +5V the
> > > > line
> > > > and the internal ROM is disabled. In TS2068 there
> > > > are
> > > > 2 ROMs that must be deactivated. As you want to use
> > > > ZX Spectrum devices, you need the ZX Spectrum
> > > > Emulator
> > > > cartrige and its ROM must be disabled, too.
> > > >
> > > > In the TC2068 the /ROMCS signal (when high) disables
> > > > both ROMs (HOME and EXROM - there are resistors and
> > > > diodes to do it) and the ROM in cartridge - using
> > > > the
> > > > /BE signal in cartrigde slot.
> > > >
> > > > So I suggest to connect the /ROMSC line on ZX side
> > > > to
> > > > the /BE (A29 - top) line of TS2068 and ignore the
> > > > /IORQGE signal (unless you really need it - I can
> > > > tell
> > > > you what changes inside the TS2068 are needed to get
> > > > that signal).
> > > >
> > > > Yarek.
> > > >
> > > >
> > > >
> > >
> > >
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14. Re: Twister Board
j1b3200 · Sat, 03 May 2003 01:34
--- In [email], Hector Jorge Picone <dunkel_piky@y...>
wrote:
> Hi,
> Anybody can help me?
> I´m trying to made a twister board for my TS2068.
Greetings,
Just a bit of twister history.
I designed the original "Super Twister" board for Zebra back in the
day. Most of the electronics design was done by members of a user
group in Long Island, I collected all the circuits and put them
together on one board. I don't remember all of the details but it
had memory decoding for a replacement rom, a voltage regulator, an
external reset button, some sort of video port and some other
circuit, the purpose of which I do not remember. Sorry but I don't
have the documentation anymore.
The board was designed to fit into a VHS video case case with
cutouts for the connectors. As I recall, the 2068 was the same color
as a silver '82 Honda Civic. I made a few prototype cases and
painted them with a can of DupliColor paint. They sure looked slick
but were too labor intensive for production.
I also wrote an extended BASIC that was called WindowPrint 32/64
which Zebra sold. You can find a copy on the Warjevo web site
somewhere. The 64 column software was advertised to work with the OS-
64 cartridge Zebra developed, actually it was a 64 column driver
which could replace the OS-64 cartridge. Naturally, the one line
BASIC command to kick the 2068 into 64 column mode was never
published in the manual.
There are several PCB prototype houses now that do nice work, some
of them even have free downloadable design software. It might be
worth looking into if you want to create a new twister board.
Regards,
John B.
15. twister board
marcel.racine22 · Sat, 29 Jan 2011 20:00
salut,
I looked in the web and could not find the diagram / schema to build my own twister board. Where can I find them ?
I found a few pictures, a PCB schema. It look like I am missting a piece of electronic in the middle if I look at some pitures.
can anyone help ?
thanks
Marcel
16. Re: twister board
zxspectrum128 · Thu, 08 Sep 2011 05:04
Please email me directly and I will send you the files I have. Those files will also be uploaded to the group, to Speccy.org and worldofspectrum.org soon.
--- In [email], "marcel.racine22" <marcel.racine22@...> wrote:
>
> salut,
>
> I looked in the web and could not find the diagram / schema to build my own twister board. Where can I find them ?
>
> I found a few pictures, a PCB schema. It look like I am missiing a piece of electronic in the middle if I look at some pitures.
>
> can anyone help ?
>
> thanks
>
> Marcel
>