Power Software Joystick Interface ROM (Electron)

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Pernod
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Power Software Joystick Interface ROM (Electron)

Postby Pernod » Tue Mar 07, 2017 4:05 pm

Does anyone have a copy of the ROM from this Electron joystick interface? Can't find it anywhere :(
- Nigel

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

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CMcDougall
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Re: Power Software Joystick Interface ROM (Electron)

Postby CMcDougall » Tue Mar 07, 2017 6:17 pm

Do you have a pic??
think there is only 2 in existence, I know a man who did dump one of them.... 8)
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Pernod
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Re: Power Software Joystick Interface ROM (Electron)

Postby Pernod » Tue Mar 07, 2017 6:55 pm

- Nigel

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

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Arcadian
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Re: Power Software Joystick Interface ROM (Electron)

Postby Arcadian » Tue Mar 07, 2017 7:03 pm

Oh, I've got one of those somewhere. I'll see if I can dig it out so the ROM can be dumped. (I did dump it years ago together with a load of other Elk roms but the floppy got corrupt).
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk

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Pernod
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Re: Power Software Joystick Interface ROM (Electron)

Postby Pernod » Tue Mar 07, 2017 8:35 pm

Arcadian wrote:Oh, I've got one of those somewhere. I'll see if I can dig it out so the ROM can be dumped.

Awesome, thanks. Would you also be able to tell which ROM bank the interface puts it in?
- Nigel

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

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Arcadian
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Re: Power Software Joystick Interface ROM (Electron)

Postby Arcadian » Wed Apr 19, 2017 6:26 pm

Rom image here:
viewtopic.php?f=32&t=12924

In order to dump the ROM I had to connect the joystick interface to a Rombox (with the Advanced Rom manager eprom installed) connected to an L-shaped Plus 3 connected to an Elk ... the joystick ROM ended up in socket 15.

Tried it with a few games .... Bug Blaster, Repton and Magic Mushrooms all worked fine with 'Method 1' ... but neither Syncron nor Arcadians would function with either method. I notice it didn't allow you to select CTRL as a key input, hence it wouldn't be any good for games that used CTRL for left and A for right (such as Thrust etc).
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For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk

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Pernod
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Re: Power Software Joystick Interface ROM (Electron)

Postby Pernod » Wed Apr 19, 2017 8:47 pm

Running in MAME...
power.jpg

The joystick interface is connected to the Plus 3.
- Nigel

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

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Pernod
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Re: Power Software Joystick Interface ROM (Electron)

Postby Pernod » Sat Apr 22, 2017 2:28 pm

Arcadian wrote:In order to dump the ROM I had to connect the joystick interface to a Rombox (with the Advanced Rom manager eprom installed) connected to an L-shaped Plus 3 connected to an Elk ... the joystick ROM ended up in socket 15.

Since you have a Rombox and Plus3 I'm curious as to what would happen if you put a ROM in the leftmost socket, ie. bank 4, to conflict with the ADFS. Would be interesting to know whether one takes priority over the other or if they are AND'd together or something else.
- Nigel

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

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daveejhitchins
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Re: Power Software Joystick Interface ROM (Electron)

Postby daveejhitchins » Tue May 02, 2017 7:00 am

Pernod wrote:
Arcadian wrote:Since you have a Rombox and Plus3 I'm curious as to what would happen if you put a ROM in the leftmost socket, ie. bank 4, to conflict with the ADFS. Would be interesting to know whether one takes priority over the other or if they are AND'd together or something else.
It just won't work - Data Bus Conflict! That's why I have disable links in both the original and new AP6s.

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
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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Pernod
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Re: Power Software Joystick Interface ROM (Electron)

Postby Pernod » Tue May 02, 2017 1:30 pm

daveejhitchins wrote:It just won't work - Data Bus Conflict! That's why I have disable links in both the original and new AP6s.

Yeah, but if you tried reading that bank what would you get?
- Nigel

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

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daveejhitchins
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Re: Power Software Joystick Interface ROM (Electron)

Postby daveejhitchins » Wed May 03, 2017 9:15 am

Pernod wrote:
daveejhitchins wrote:It just won't work - Data Bus Conflict! That's why I have disable links in both the original and new AP6s.

Yeah, but if you tried reading that bank what would you get?
Well, if you think about it - 2 x data buffers (74LS245?) - One driving low one driving high
74LS245 I Drive.png
As you can see the sink current should win! I'm not sure the 245 driving 15mA is going to be happy! - Effectively, you'll get garbage and possibly a damaged device or two!

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
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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