Search found 87 matches

by egel
Mon Jul 13, 2020 10:42 am
Forum: 32-bit acorn hardware
Topic: Acorn AKA20 We32206 Floating Point Co-Processor
Replies: 28
Views: 1395

Re: Acorn AKA20 We32206 Floating Point Co-Processor

TimoHartong wrote: ↑
Sat Feb 29, 2020 9:49 am
It would fit nicely in my R140 :D .
You can borrow it sometime. I'd like to see it work.
by egel
Mon Jul 13, 2020 10:39 am
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 30
Views: 1305

Re: R260 - missing CPU card?

Trisomie21 wrote: ↑
Sun Jul 12, 2020 11:17 pm
egel wrote: ↑
Sat Jul 04, 2020 11:30 pm
A R260 keyboard looks like this:
overzicht.jpgdetail.jpg
I sadly only have the keyboard
Do you want to sell the keyboard? πŸ€”
Only if you have an R260 with a missing keyboard and you have an A3xx or A4xx keyboard for me. Otherwise I wil have a machine without a keyboard. :D
by egel
Fri Jul 10, 2020 8:42 am
Forum: 32-bit acorn hardware
Topic: RISCPC Power Supply Refurbish
Replies: 35
Views: 1062

Re: RISCPC Power Supply Refurbish

The only thing I've ever replaced in a Risc-PC PSU is the Schottky Barrier Rectifier. I miss that on the list. That part is heavily under dimensioned, but possibly only in the 70W version.
by egel
Tue Jul 07, 2020 3:54 pm
Forum: 8-bit acorn emulators
Topic: Model Master 128+Acorn Z80 Second Processor
Replies: 30
Views: 1211

Re: Model Master 128+Acorn Z80 Second Processor

viewtopic.php?f=32&t=17150

Jonathan Harston solution for a cp/m harddisk is slow and somewhat unstable.
by egel
Sat Jul 04, 2020 11:30 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 30
Views: 1305

Re: R260 - missing CPU card?

That looks like the right keyboard to me? Looks like the keyboard that came with my A540. I guess the RISCiX models could have been different, but seems unlikely. Matches the picture in the brochure - http://chrisacorns.computinghistory.org.uk/docs/Acorn/Brochures/Acorn_APP480_R260.pdf edit: actual...
by egel
Tue Jun 30, 2020 10:11 pm
Forum: 8-bit acorn hardware
Topic: VIDEONULA questions
Replies: 41
Views: 1488

Re: VIDEONULA questions

Will a VideoNuLA fit next to an ATPL Sidewise ROM board? From what I can see it will be very tight. p1030777.jpg Yes it fits. It's on the same level now. A challenge is to lay the fly-lead in such a way that the big yellow spring clip falls between the small chips so that the Sidewise ROM board fit...
by egel
Tue Jun 30, 2020 9:53 am
Forum: 8-bit acorn hardware
Topic: Model B+ boot problems
Replies: 13
Views: 425

Re: Model B+ boot problems

Have you checked the keyboard cable? Is it in the right place? Shifted one place gives weird effects.
by egel
Sat Jun 27, 2020 10:11 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron Plus 3 are they collectable
Replies: 44
Views: 1449

Re: Acorn Electron Plus 3 are they collectable

acorndave wrote: ↑
Sat Jun 27, 2020 8:07 pm
One bundled with an Elk here for Β£425 !!!

Personally think that's very ambitious

https://www.ebay.co.uk/itm/New-BBC-Acor ... SwBO1eHmDH
But the seller thinks it is a hard drive unit.
by egel
Wed Jun 24, 2020 12:22 pm
Forum: introduce yourself
Topic: here is a new frog challenger
Replies: 21
Views: 1324

Re: here is a new frog challenger

That is like an Olivetti Prodest PC128S emulating an Olivetti Prodest PC128. That sounds easier than it is.
by egel
Tue Jun 23, 2020 12:47 pm
Forum: 8-bit acorn hardware
Topic: TOP 5 interest of the RASP PI CO PRO ?
Replies: 71
Views: 2161

Re: TOP 5 interest of the RASP PI CO PRO ?

drfloyd wrote: ↑
Tue Jun 23, 2020 12:10 pm
DOS... i can run lot of MSDOS game ????? If yes, perhaps....
Not a lot of DOS games.

But there are other uses, you can also use a Raspberry Pi, with an other levelshifter, as a hard disk controller and some other things (Pi1Mhz) or as an RGB to HDMI converter.
by egel
Fri Jun 19, 2020 7:30 pm
Forum: 8-bit acorn hardware
Topic: BBC MASTER 128 Vs 512 ?
Replies: 9
Views: 350

Re: BBC MASTER 128 Vs 512 ?

Does it read natively MSDOS? No, it runs Dos Plus. That is a DOS emulation on top of CP/M-86 writen by Digital Research. It can run some MS-DOS 2 and CP/M programs. The graphics are almost CGA, no brown but yellow. But it can do this, what no other CGA-only machine can: 90427468_3304394452906052_26...
by egel
Tue Jun 16, 2020 10:40 am
Forum: 8-bit acorn hardware
Topic: TURBO MMC or GOTEK ?
Replies: 58
Views: 1631

Re: TURBO MMC or GOTEK ?

What about a hardisk ? (I read for exemple that DOOM perhaps need a Harddisk as the files are big) What is the solution to simulate harddisk ? More or less real harddisks are: There's BeebSCSI or BeebSCSI via RPi or SCSI Host Adaptor (again, based on BeebSCSI design) to hook up to more modern SCSI ...
by egel
Tue Jun 16, 2020 10:12 am
Forum: 8-bit acorn hardware
Topic: VIDEONULA questions
Replies: 41
Views: 1488

Re: VIDEONULA questions

That's interesting. My ATPL Sidewise has worked the contacts loose in the ADC socket, and yesterday I sat a set of dual-wipe sockets inbetween the Sidewise and the motherboard to improve the electrical contact until I get the soldering iron out, and I still managed to fit the keyboard and case on. ...
by egel
Mon Jun 15, 2020 7:01 pm
Forum: 8-bit acorn hardware
Topic: VIDEONULA questions
Replies: 41
Views: 1488

Re: VIDEONULA questions

Will a VideoNuLA fit next to an ATPL Sidewise ROM board? From what I can see it will be very tight. Not next to but it should fit *under* the ATPL board. You may want to raise the ATPL board up a little by using a couple of sockets just to be absolutely sure of clearance. I include one turned pin s...
by egel
Mon Jun 15, 2020 1:22 pm
Forum: 8-bit acorn hardware
Topic: VIDEONULA questions
Replies: 41
Views: 1488

Re: VIDEONULA questions

Will a VideoNuLA fit next to an ATPL Sidewise ROM board? From what I can see it will be very tight.
by egel
Mon Jun 15, 2020 10:06 am
Forum: wanted
Topic: Millipede AlphaLock software
Replies: 4
Views: 460

Re: Millipede AlphaLock software

Which Paul should I contact?
I've tried to contact Q3D/Riscos.com, but haven't received a reply.
by egel
Fri Jun 05, 2020 1:57 pm
Forum: 8-bit acorn software: other
Topic: What was 'Microtext'?
Replies: 3
Views: 332

Re: What was 'Microtext'?

by egel
Tue Jun 02, 2020 7:12 pm
Forum: 32-bit acorn hardware
Topic: Mouse and keyboard
Replies: 7
Views: 281

Re: Mouse and keyboard

acorndave wrote: ↑
Tue Jun 02, 2020 6:38 pm
There's a pic here

https://www.iconbar.com/hardware/iyonix ... g/bits.jpg
Direct linking to an image file is not allowed, but the image is somewhere on this page:

https://www.iconbar.com/forums/viewthre ... newsid=919
by egel
Tue Jun 02, 2020 1:12 pm
Forum: 8-bit acorn hardware
Topic: Pi1MHz Software
Replies: 39
Views: 1373

Re: Pi1MHz Software

dp11 wrote: ↑
Sun May 31, 2020 12:17 pm
DSI won't work currently , it might be possible.
Would composite also be possible? And not to much work?
by egel
Tue Jun 02, 2020 12:16 pm
Forum: archive requests
Topic: Essential Software Master 512 Utilities
Replies: 1
Views: 282

Re: Essential Software Master 512 Utilities

Some but not all were attached in a crippled version with the Master 512 Technical Guide published by Dabs Press
http://www.cowsarenotpurple.co.uk/bbcco ... s-disc.zip
by egel
Sun May 31, 2020 11:46 am
Forum: 8-bit acorn hardware
Topic: Pi1MHz Software
Replies: 39
Views: 1373

Re: Pi1MHz Software

dp11 wrote: ↑
Sat May 30, 2020 8:39 pm
Only Pizero kernel.img at the moment . I'll do a full build soon.
Will a DSI connected LCD display also work, like the Raspberry Pi Touch Display?
by egel
Sat May 30, 2020 7:35 pm
Forum: 8-bit acorn hardware
Topic: Pi1MHz Software
Replies: 39
Views: 1373

Re: Pi1MHz Software

Lardo Boffin wrote: ↑
Sat May 30, 2020 4:22 pm
Interesting sounding project! What hardware is required to connect the Pi to the 1MHz bus? Obviously a level shifter of some sort but what are the specifics?
Thanks!
viewtopic.php?f=3&t=18513
by egel
Wed May 27, 2020 11:54 am
Forum: archive requests
Topic: Euclid manual
Replies: 18
Views: 924

Re: Euclid manual

eelco108 wrote: ↑
Thu May 21, 2020 11:10 am
The 1989 version of the manual does mention RISC OS, so my guess would be that is was written with RISC OS 3 in mind (no version number mentioned anywhere).
It was more likely with RISC OS 2 in mind. RISC OS 2 was called RISC OS before RISC OS 3 came out in 1991.
by egel
Thu May 21, 2020 2:26 pm
Forum: archive requests
Topic: Essential Software Master 512 Utilities
Replies: 1
Views: 282

Essential Software Master 512 Utilities

Essential Software made some nice programs for the Master 512. Some you can find at http://www.cowsarenotpurple.co.uk/bbccomputer/master512/software.html , but has someone archived the rest somewhere? According to the Master 512 Technical Guide these should exist too: * Printscreen Utilities: GRDUMP...
by egel
Sun May 10, 2020 12:39 pm
Forum: 8-bit acorn hardware
Topic: Pi1MHz future supported devices
Replies: 15
Views: 757

Re: Pi1MHz future supported devices

Some other wild ideas:

Add more members of the family? like the Hybrid Music 2000

Network? viewtopic.php?f=3&t=16565

Video Digitiser? a Pi can have a camera

mouse ?

USB harddisk ?
by egel
Fri May 08, 2020 4:27 pm
Forum: 8-bit acorn hardware
Topic: Collecting (historical) uses for second processors
Replies: 10
Views: 496

Re: Collecting (historical) uses for second processors

from http://www.cowsarenotpurple.co.uk/bbccomputer/master512/compatibility-info.pdf SOFTWARE THAT SHOULD WORK ON THE MASTER 512 (ISSUE 10) TITLE VER. SUPPLIER COMMENT Ability 1.2 Migent Except Comms & tutor Ability Plus Migent Except Comms & tutor Accountant 1.0 Sage Some colour problems Accountant ...
by egel
Sun May 03, 2020 3:12 pm
Forum: 8-bit acorn hardware
Topic: New SCSI Host Adaptor
Replies: 91
Views: 3900

Re: New SCSI Host Adaptor

In my collection of old SCSI disks I searched for a working disk. I haven't found one yet. What properties should I search for so there is a chance it will work? What I have found so far that they should be able to have SCSI-1 and 265 bit sectors. Is this correct? Or should the disk have even more p...
by egel
Tue Apr 28, 2020 4:19 pm
Forum: 8-bit acorn hardware
Topic: Master 128 Sideways RAM options
Replies: 3
Views: 247

Re: Master 128 Sideways RAM options

master128.png ROM 0,1,2,3 are the two cartridge slots LK18 plug, made West: Paged ROM/RAM Select. Two position link. When fitted in the West position, this link causes 16Kbyte of RAM to appear in each of the "sideways" memory "slots" 6 and 7. When fitted in the East position, a 32Kbyte ROM occupyin...

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