Jonno Downes wrote:
> On Jan 11, 4:52 am, sicklittlemonkey  wrote:
>> This is actually similar to Brendan's Apple Game Server.
>> Instead of booting, or using a ROM, it's IN#2 and serial.
>>
> Indeed - in fact this project started with the idea of creating
> something inspired by AGS for the C64, once i got that booting
> properly I decided to port it back to the A2.
> 
>> In fact I've just finished adding "TCP Serial" to AppleWin.
>> With this you can run AGS and AppleWin on the same PC.
>> And you can even telnet to AppleWin from another PC. ;-)
> 
> Nice work! Since you're on a roll, can I lobby for adding my current
> emulator wishlist item which is a minimalist firmware card. what I
> imagine is :
> 
> a 28F512 (64KB EPROM) with
> 	* D0..D7 & A0..A7 connected to D0..D7 & A0..A7 of the peripheral card
> bus
> 	* /CE connected to /IOSEL (pin 1 of the peripheral card bus)
> 	* /OE connected to inverted R/W (pin 18 of the peripheral card bus)
> 	* A8..A15 connected to O0..o7 of a 74LS273 (Octal Latch)
> 
> the 74LS273 is wired up with
> 	* CP (clock pulse) connected to inverted /DEVSEL (pin 41 of the bus)
> 	* D0..D7 connected to D0..D7 of the peripheral bus
> 	* O0..O7 connected to A8..A15 of the 28F512
> 	* /MR (master reset) connect to /RES (pin 31 of the bus)
> 
> There would also need to be a 74LS04 (Hex inverter) to invert R/W on
> the bus to
>  /OE on the 28F512, and /DEVSEL on the bus to CP on the 74LS273
> 
> The net effect would be a bank switched EPROM, where any one of 256
> pages
> is selected by writing the bank number to the card's peripharal I/O
> space
> (say $C0A0 for slot 2) and the currently selected bank is visible at
> $Cn00
> to $CnFF (i.e. $C200..$C2FF for slot 2).
> 
> I'd really like to see something like this (or any other way of
> extending the ROM space) get taken up as some kind of standard with
> the emulators (and also eventually be manufactured).

Have you considered using the 2KB I/O bank-switched space at $C800?
It would give you much bigger "pages".  (And I understand that you'd
still like to have the Csxx ROM space bank-switched.)

-michael

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