-
Buzzing SpectrumPicked up a Spectrum + (48k) today at a car boot, for 3 quid:-P On the plus side it does work, however it does buzz pretty bad. What normally causes …
... originally made as a + and was never contained in a rubber key case. The ... Issue 4S ever show up in a rubber key case? Well, apart from ... transferred from a + with a bad membrane to a rubber key with a good membrane ... -
Buzzing SpectrumPicked up a Spectrum + (48k) today at a car boot, for 3 quid:-P On the plus side it does work, however it does buzz pretty bad. What normally causes …
... Issue 4S ever show up in a rubber key case?)[/QUOTE]
a rubber key that was marked "Manufactured ... "... etc. on it, it was a 4S. Having said that, I ... my board got swapped for a 3B occasionally, but it was ... -
New for 2009 - mc onelinersI found the limit of one line and one screen's worth of program really useful in (re-)learning BASIC, so I've decided to carry the format over into m…
[code]
IN A,(C)
CP 191
[/code]
I would use this to make it issue independant:
[code]
IN A,(C)
CPL
AND 31
[/code]
The LD BC,32766 can be replaced with LD B,127 -
New for 2009 - mc onelinersI found the limit of one line and one screen's worth of program really useful in (re-)learning BASIC, so I've decided to carry the format over into m…
... keyboard caps to v
in a,(c)
cp 191
... keyboard space to b
in a,(c)
cp 191
... ;source of random bytes in ROM
ld d ... bc
ld a,b
or c
jr nz, ... wait
jp principalloop
;return score in ... -
Keyboard Input$/scan problemHi, I'm finally fulfilling my promise to get a reasonable understanding of the Speccy and embarking upon attempting a few simple routines in Assembl…
... /> I hate to sound like a bad craftsman blaming his tools ... not recognise the instruction 'IN A,(C)' or 'OUT (C),D' :-? ...... so I decided ... ~ only rewriting line 4 as: 'IN A,(FEh)' and exclude line 10 ... use since it's built in to the emulator. -
Keyboard Input$/scan problemHi, I'm finally fulfilling my promise to get a reasonable understanding of the Speccy and embarking upon attempting a few simple routines in Assembl…
... advice.
Just wrote a short and sweet routine that ... won't recognise the instruction 'IN A, (C)'. Shame really ~ but at least ... -
The best ... beginning with "G"Name (in your opinion) your "Best game beginning with [A to Z, one letter per post]". So, for the letter "G", which do you think are the: [B]Best …
... />
Best sound or music (in a game): [B]Gyroscope[/B] - Not ... too.
Best graphics (in a game): [B]Gyron[/B] - Torus ... big ones in glorious 3D. Throw in a 3 colour map with no ... colour clash, a spinning pre ... -
New Spectrum Computer DevelopmentHey does anyone know of any decent new Spectrum clones being developed? I find it amazing how Zilog still produce a Z80 backwards compatible chip (an…
... The only clone with a cat in hell's chance of ... 's not much point in building a Speccy clone (other than ... built-in ZXCF and other goodies that fit in a rubber key case. Building a ... hobbyist clone in the spirit ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
Am I right in thinking if you use [B]IN A,(C)[/B] or any ... register with the [B]IN r,(C)[/B ... if you're a hex nut
[B]IN A,(C)[/B]
in [B]A[/B] rather than any ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... ]Am I right in thinking if you use [B]IN A,(C)[/B] or ... any register with the [B]IN r,(C)[/B ... if you're a hex nut
[B]IN A,(C)[/B]
in [B]A[/B] rather than any ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... ]Am I right in thinking if you use [B]IN A,(C)[/B] or ... any register with the [B]IN r,(C)[/B ... if you're a hex nut
[B]IN A,(C)[/B]
[/QUOTE ... ]
Yes... although in the case ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... br /> testearly xor a
ld a,r
in a,(c) ; read floating bus ... nz
ld a,r
in a,(c) ; read floating bus ... -
Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…
...
LD A,255
OUT (C),A ;signal CTS = ... 1
LD C,247 ;now ... port
loopaddr IN A,(C) ;12
JP P ... -
+3 Centronics port: How does it work?I've been trying to follow the code with Fuse's debugger and I can't see it writing anywhere except to port 0x1ffd. It also jumps through some fairly…
... /> jr nc, lpt_write
ld a, c ;Byte to output
ld ... bc,0FFDh
out (c),a ;Latch output lines
ld ... /> out (c),a
ld a,(hl)
ei
out (c),a ;and up ... ;Read the BUSY line
in a,(c)
rra ;into the carry ... -
+3 Centronics port: How does it work?I've been trying to follow the code with Fuse's debugger and I can't see it writing anywhere except to port 0x1ffd. It also jumps through some fairly…
... ; read busy bit
in a,(c) ;
bit 0,a ;
jr nz ... a,0x7f ; test for space
in a,(0xfe) ;
rra ;
ret c ... a,0xfe ; test for shift
in a,(0xfe) ;
rra ;
ret c ... -
spectrum cloneI was wondering if it would be a fairly straightforward job making a clone of the spectrum? Could someone get a spectrum circuit board made complete…
... of today can be a much smaller circuit than the ... room for things like a built-in ZX-CF or similar. The ... "today's ULA".
A few months ago someone posted ... their clone that fit in a rubber key case, except in that instance it ... -
2 new FPGA based clone from russiaFirst of all I wanna introduce you to the [B]ZX Evo[/B] by NedoPC -> [URL="http://www.nedopc.com/zxevo/zxevo.php"]http://www.nedopc.com/zxevo/zxevo.p…
... like it could all fit in a rubber key case, right?) I ... need to get some practice in SMD soldering first though ... (and bear in mind I'm not a hardware guy so ... ), most of the 'cleverness' in all of these projects is ... in the FPGA rather than ... -
Preliminary MontyHey All... A new 2009 production (port from Atari) of a game called "Preliminary Monty" is out. It is a VERY nice platform game - with a bit "crude…
... support kempston joystick port and IN A,(#1F) will always return ... . All unused ports work as IN A,(#FF) !!!
If ... inactive, you must disable joystick in game !
...
IN A,(C) ;if you will read joystick via IN A,(c), then kemp ... -
Preliminary MontyHey All... A new 2009 production (port from Atari) of a game called "Preliminary Monty" is out. It is a VERY nice platform game - with a bit "crude…
... support kempston joystick port and IN A,(#1F) will always return ... . All unused ports work as IN A,(#FF) !!!
If ... inactive, you must disable joystick in game !
...
IN A,(C) ;if you will read joystick via IN A,(c), then kemp ... -
Preliminary MontyHey All... A new 2009 production (port from Atari) of a game called "Preliminary Monty" is out. It is a VERY nice platform game - with a bit "crude…
... support kempston joystick port and IN A,(#1F) will always return # ... . All unused ports work as IN A,(#FF) !!!
If ... 001F
IN A,(C) ;if you will read joystick via IN A,(c), then kemp ... ]
HALT
IN A,(31) ;testing joy port after ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... to the palette and use in to set the mode (counter ... ]
ld bc,$013B
in a,(c) ; Set palette mode on.
a load of outd instructions.
fix or mod?if you have a none working machine.. and you can't get the parts.. would you wait in the hope of getting parts ?
If I had the carcass of a rubber key Spectrum, I think I'd fill it with the eventually-to-come Harlequin. That way it's still a real hardware Speccy (not just an emulator in a rubber key case) and a little different.Official CSSCGC 2010 Competition ThreadDear Wossers, As 'loser' of the 2009 competition, I am now obliged to host the 2010 competition. I have created a site which will provide a hub for …
... broaden the number of competitors a bit. For me it' ... last time I coded a "serious" C/C++ project was about 14 ... for me to see "C++ style" comments in a C listing (really handy ... though!) and also variable declarations anywhere in ...Help fix this keyboard read program?This code runs in an interrupt routine with DI. What would be the simplest way of making it so it doesn't auto repeat a keypress? [code]keys: ld a…
BloodBaz - you corrupt 'b' instantly!
[QUOTE=BloodBaz;424884]
[code]
keys:
ld hl, keyYUIOP
ld b, (hl) ; Get last keypress for YUIOP48K -128K upgradeHas anybody ever made, or is it possible to make an upgrade module for a 48K spectrum that will let you operate it like a 128K Spectrum, and back aga…
... make an upgrade module for a 48K spectrum that will let ... you operate it like a 128K Spectrum, and back again ... /> Yes. I'm currently doing a CPLD version of this mod ... AY, and fit it all in a rubber key Spectrum):
[url]http ...48K -128K upgradeHas anybody ever made, or is it possible to make an upgrade module for a 48K spectrum that will let you operate it like a 128K Spectrum, and back aga…
... ]Yes. I'm currently doing a CPLD version of this mod ... AY, and fit it all in a rubber key Spectrum):
[url]http ...48K -128K upgradeHas anybody ever made, or is it possible to make an upgrade module for a 48K spectrum that will let you operate it like a 128K Spectrum, and back aga…
... ]Yes. I'm currently doing a CPLD version of this mod ... AY, and fit it all in a rubber key Spectrum):
[URL]http ...Delete keyIs it the case that this: [CODE]ld bc, 0xEEFE in a, (c) rrca jp nc, delete_key_pressed[/CODE] will jump if Caps-shift is pressed [B]or[/B] i…
... /> [CODE]ld bc, 0xEEFE
in a, (c)
rrca
jp nc ... ?
[/QUOTE]
Keys in multiple half-row reads behave ...
