Today I received.....

on-topic Acorn-related news and discussions not covered by the other forums
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CMcDougall
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Re: Today I received.....

Post by CMcDougall » Thu May 24, 2018 9:06 pm

^ put it in the dishwasher Dave 8)
Elminster wrote:suspect it varies greatly depending on what area you are in
for FTTC it does not matter about exchange, thats just how far your dial tone travels (& ADSL 8/0.448), can be 10,000+m my usual fix anyways! #-o
then if <400m from the FC (VDSL), spitting out 40/10 , 55/10 or 80/20, it will be about same in house, after 800m it can more than half
just like mine, 800m 80/20 at FC, 33/6 at house :(
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Elminster
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Re: Today I received.....

Post by Elminster » Thu May 24, 2018 9:28 pm

CMcDougall wrote:^ put it in the dishwasher Dave 8)
Elminster wrote:suspect it varies greatly depending on what area you are in
for FTTC it does not matter about exchange, thats just how far your dial tone travels (& ADSL 8/0.448), can be 10,000+m my usual fix anyways! #-o
then if <400m from the FC (VDSL), spitting out 40/10 , 55/10 or 80/20, it will be about same in house, after 800m it can more than half
just like mine, 800m 80/20 at FC, 33/6 at house :(
Think you misquoted me. Maybe you meant to quote something else. I was referrring to the reliability of the service. Virgin was always busted when I was in Stevemage.

VincentVega
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Re: Today I received.....

Post by VincentVega » Wed May 30, 2018 5:50 pm

Inspired by a thread elsewhere on here, a Batronix EPROM programmer, together with some EPROMs. They're the OTP type, which is probably fine for my use. (I didn't want to risk getting fakes on eBay). They came in what has to be the longest anti-static bag I've ever seen.

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Also, a region free kit for my Oppo BR/DVD player:

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Commie_User
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Re: Today I received.....

Post by Commie_User » Thu May 31, 2018 12:05 am

Lardo Boffin wrote:
Thu Mar 08, 2018 1:57 pm
Managed to load BBC Basic from disc one, as well as a verify program. The verify program checked all the other discs out as ok.
Yeah, well. Isn't that the same BBC BASIC all the machines have in ROM? Or perhaps it's an upgrade. The C64 had a much needed superior range of BASICs on disk after all.

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Elminster
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Re: Today I received.....

Post by Elminster » Thu May 31, 2018 12:25 am

6809 card by Ben Chong for RC2014.

Got a few.
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6835E3D6-FA44-47F7-BE85-75FBF6B4EA6D.jpeg

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danielj
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Re: Today I received.....

Post by danielj » Thu May 31, 2018 5:14 am

Commie_User wrote:
Thu May 31, 2018 12:05 am
Yeah, well. Isn't that the same BBC BASIC all the machines have in ROM? Or perhaps it's an upgrade. The C64 had a much needed superior range of BASICs on disk after all.
It's BBC BASIC for the Z80 coprocessor. That wasn't in ROM.

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Re: Today I received.....

Post by Commie_User » Thu May 31, 2018 7:25 am

Ah. I see. Thanks.

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robheaton
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Re: Today I received.....

Post by robheaton » Thu May 31, 2018 6:28 pm

Something to speed up my 1541 arrived yesterday...
fastload.jpg

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topcat96
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Re: Today I received.....

Post by topcat96 » Thu May 31, 2018 7:01 pm

robheaton wrote:
Thu May 31, 2018 6:28 pm
Something to speed up my 1541 arrived yesterday...
Get yourself a JiffyDOS chip for your 1541 too and watch it sprint instead of jog \:D/

http://store.go4retro.com/jiffydos-kern ... verlay-ic/
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Lardo Boffin
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Re: Today I received.....

Post by Lardo Boffin » Thu May 31, 2018 7:11 pm

topcat96 wrote:
Thu May 31, 2018 7:01 pm
robheaton wrote:
Thu May 31, 2018 6:28 pm
Something to speed up my 1541 arrived yesterday...
Get yourself a JiffyDOS chip for your 1541 too and watch it sprint instead of jog \:D/

http://store.go4retro.com/jiffydos-kern ... verlay-ic/
Interesting! I have a similar cart and it speeds my SD2IEC up dramatically. I recently got a 1541 disc drive so presumably I just get the 1541 24 pin version of this and plug it into the disc drive? Not actually opened the case yet but need to anyway as the eject mechanism is a bit reluctant. :|
BBC model B 32k issue 4, 16k sideways RAM, Watford 12 ROM board, Retroclinic Datacentre + HDD, Viglen twin 40/80 5.25" discs, acorn cassette, Acorn 6502 coproc
BBC model B 32k issue 7, turboMMC, Opus Challenger 3 512k, Pi 3 coproc
BBC Master

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topcat96
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Re: Today I received.....

Post by topcat96 » Thu May 31, 2018 7:35 pm

Lardo Boffin wrote:
Thu May 31, 2018 7:11 pm
Interesting! I have a similar cart and it speeds my SD2IEC up dramatically. I recently got a 1541 disc drive so presumably I just get the 1541 24 pin version of this and plug it into the disc drive? Not actually opened the case yet but need to anyway as the eject mechanism is a bit reluctant. :|
I have an Epyx Fastload cartridge for my SD2IEC and also JiffyDOS chips in both my C64c and Excelerator+ floppy disk drive. They don't interfere with each other and it's bliss!

If you only have an SD2IEC then stick with just the Fastload cartridge. If you have both the SD2IEC and a 1541 or similar, then I definitely recommend the JiffyDOS upgrade for both C64 and floppy disk drive.

You should also take note that Fastload does NOT speed up loading of all floppy disk based games, JiffyDOS does. Some original games (both cassette and disk based), may refuse to load if they detect any cartridge plugged in - JiffyDOS is immune to such protection schemes :)
Last edited by topcat96 on Thu May 31, 2018 10:01 pm, edited 1 time in total.
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robheaton
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Re: Today I received.....

Post by robheaton » Thu May 31, 2018 9:19 pm

topcat96 wrote:
Thu May 31, 2018 7:01 pm
Get yourself a JiffyDOS chip for your 1541 too and watch it sprint instead of jog \:D/
I have debated getting a JiffyDOS chip, does it really make a massive difference?

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topcat96
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Re: Today I received.....

Post by topcat96 » Thu May 31, 2018 9:51 pm

robheaton wrote:
Thu May 31, 2018 9:19 pm
I have debated getting a JiffyDOS chip, does it really make a massive difference?
I recommend you get one for the C64 and one for your 1541. As shown in the following table you can see the difference it makes:

Taken from the c64 wiki ... All times in seconds.

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Richard Russell
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Re: Today I received.....

Post by Richard Russell » Thu May 31, 2018 10:04 pm

danielj wrote:
Thu May 31, 2018 5:14 am
It's BBC BASIC for the Z80 coprocessor. That wasn't in ROM.
Considerably smaller than 6502 BASIC too, around 12K if I remember rightly, but not as fast. Also a few subtle differences such as the range of floating-point numbers being different.

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Elminster
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Re: Today I received.....

Post by Elminster » Thu May 31, 2018 10:16 pm

I have SWTPC 8k BASIC up and running now, I thought my Acorn's were a bit sluggish at times, but a 1MHz 6800 loading BASIC over 1200 baud serial, and then loading a small Basic program, I can have a nice nap.

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Lardo Boffin
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Re: Today I received.....

Post by Lardo Boffin » Fri Jun 01, 2018 6:29 am

Richard Russell wrote:
Thu May 31, 2018 10:04 pm
danielj wrote:
Thu May 31, 2018 5:14 am
It's BBC BASIC for the Z80 coprocessor. That wasn't in ROM.
Considerably smaller than 6502 BASIC too, around 12K if I remember rightly, but not as fast. Also a few subtle differences such as the range of floating-point numbers being different.
Interesting - is it slow compared to the 6502 co-proc version or the just the native version on the beeb?
BBC model B 32k issue 4, 16k sideways RAM, Watford 12 ROM board, Retroclinic Datacentre + HDD, Viglen twin 40/80 5.25" discs, acorn cassette, Acorn 6502 coproc
BBC model B 32k issue 7, turboMMC, Opus Challenger 3 512k, Pi 3 coproc
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Richard Russell
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Re: Today I received.....

Post by Richard Russell » Fri Jun 01, 2018 8:29 am

Lardo Boffin wrote:
Fri Jun 01, 2018 6:29 am
Interesting - is it slow compared to the 6502 co-proc version or the just the native version on the beeb?
I was comparing a 2 MHz 6502 with a 4 MHz Z80 (or equivalently a 3 MHz 6502 with a 6 MHz Z80), which would have been considered nominally the same speed. Sophie managed to squeeze more performance out of the 6502 than I was able to from the Z80, although it depended very much on the operations concerned. How much of that was down to the skill of the programmer and how much the CPU I can't say!

Edit: Just to add that I was obsessed with code size in those days, so I invariably chose shorter code over faster code, which might not have been the best choice for an interpreter. :?

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Elminster
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Re: Today I received.....

Post by Elminster » Fri Jun 01, 2018 8:41 am

Richard Russell wrote:
Fri Jun 01, 2018 8:29 am
Lardo Boffin wrote:
Fri Jun 01, 2018 6:29 am
Interesting - is it slow compared to the 6502 co-proc version or the just the native version on the beeb?
I was comparing a 2 MHz 6502 with a 4 MHz Z80 (or equivalently a 3 MHz 6502 with a 6 MHz Z80), which would have been considered nominally the same speed. Sophie managed to squeeze more performance out of the 6502 than I was able to from the Z80, although it depended very much on the operations concerned. How much of that was down to the skill of the programmer and how much the CPU I can't say!

Edit: Just to add that I was obsessed with code size in those days, so I invariably chose shorter code over faster code, which might not have been the best choice for an interpreter. :?
Ah you using some particular benchmarks for this. I might trying running them on the 6800, there is 4 or 5 different versions of basic on the SWTPC/6800 might be interesting to compare. Probably this info posted somewhere else (you website I expect) but not looked yet, just occured to me reading this.

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1024MAK
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Re: Today I received.....

Post by 1024MAK » Fri Jun 01, 2018 9:06 am

With the Z80 CPU, there are rather a lot of ways to write space efficient code, but at the expense of the code being rather slow. And when you only had relatively limited memory space...
And the 6502 BBC BASIC (BASIC 2 as in the ROM of the production BBC Model) was one of the fastest BASICs available for 8 bit computers. But of course, it had an entire 16k bytes ROM to itself, plus any I/O operations used the OS ROM, which itself had 15k bytes of ROM.

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Richard Russell
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Re: Today I received.....

Post by Richard Russell » Fri Jun 01, 2018 11:41 am

Elminster wrote:
Fri Jun 01, 2018 8:41 am
Are you using some particular benchmarks for this.
As I've documented elsewhere, I designed the Z80 BBC BASIC interpreter to use variant numerics (rather than floats) partly because it made it appear faster than it actually was with popular benchmark tests of the day. :wink:
1024MAK wrote:
Fri Jun 01, 2018 9:06 am
But of course, it had an entire 16k bytes ROM to itself
I don't think there was any particular size limit on the interpreter in the Z80 Second Processor, but the identical code was used in the Sinclair/Cambridge Z88 and the Amstrad NC100/150/200 which had no ROM to spare.

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1024MAK
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Re: Today I received.....

Post by 1024MAK » Fri Jun 01, 2018 12:36 pm

The only reason that I mentioned ROM capacity, is because most 1980's 8 bit 'home' computers had 24k bytes or less for the BASIC and the equivalent of the OS for that machine.

Mark
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk NOW!
BeebWiki‬ - for answers to many questions...

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sbadger
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Re: Today I received.....

Post by sbadger » Mon Jun 04, 2018 6:24 pm

robheaton wrote:
Thu May 31, 2018 9:19 pm
topcat96 wrote:
Thu May 31, 2018 7:01 pm
Get yourself a JiffyDOS chip for your 1541 too and watch it sprint instead of jog \:D/
I have debated getting a JiffyDOS chip, does it really make a massive difference?
like topcat said. yes, massive. It makes it so very pleasant to use. I use it with a sd2iec and it's soooooo much quicker.
So many projects, so little time...

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marcusjambler
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Re: Today I received.....

Post by marcusjambler » Mon Jun 04, 2018 9:03 pm

Shiny toy off Ebay...
IMG_3608a.jpg
:D

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Pernod
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Re: Today I received.....

Post by Pernod » Mon Jun 04, 2018 9:14 pm

marcusjambler wrote:
Mon Jun 04, 2018 9:03 pm
Shiny toy off Ebay...

IMG_3608a.jpg

:D
Nice, could you add some details to my post at viewtopic.php?f=4&t=13937#p202436

Would like to see some photos of the board (both sides), and the value of the crystal on there, thanks.
- Nigel

BBC Model B, ATPL Sidewise, Acorn Speech, 2xWatford Floppy Drives, AMX Mouse, Viglen case, BeebZIF, etc.

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marcusjambler
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Re: Today I received.....

Post by marcusjambler » Mon Jun 04, 2018 9:26 pm

Nice, could you add some details to my post at viewtopic.php?f=4&t=13937#p202436

Would like to see some photos of the board (both sides), and the value of the crystal on there, thanks.
No problem. I'll get on it in the next few days

Marcus

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lcww1
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Re: Today I received.....

Post by lcww1 » Tue Jun 05, 2018 8:56 pm

Time to upgrade my A3000:
0EEF991F-AE7D-4C82-95B0-8B95B29E49DE.jpeg
VIDC Enhancer pcb from OSHPark

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marcusjambler
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Re: Today I received.....

Post by marcusjambler » Wed Jun 06, 2018 8:29 am

Ooh... That looks interesting....
Are there any boards knocking around?

Marcus

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topcat96
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Re: Today I received.....

Post by topcat96 » Wed Jun 06, 2018 10:00 am

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Sigh!
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daveejhitchins
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Re: Today I received.....

Post by daveejhitchins » Wed Jun 06, 2018 10:09 am

A new pair of socks? . . . :lol:

Dave H :D
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Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

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topcat96
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Re: Today I received.....

Post by topcat96 » Wed Jun 06, 2018 12:09 pm

daveejhitchins wrote:
Wed Jun 06, 2018 10:09 am
A new pair of socks? . . . :lol:

Dave H :D
Ahhh ... if only [-o<
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