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SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> ld (hl), a ; store it
ld a, b ; mask to A
inc ... /> defs 96, 255 ; unused locations (ROM 0)
.endif
.ifdef ... /> defs 75, 255 ; unused locations (ROM 0)
.endif
.ifdef ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... a ; LD A, 0
ld bc, paging ; VRAM / ROM
out (scld), a ... ; set mode
ld a, 16 ; ...
ld a, b ; high byte to A
cp ... :
call mode_switch ; ensure ROM 0
org ... -
LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…
... how it makes such a song and dance about ...
Yes, it is a LOAD "" CODE game. It is ... will have been returning to ROM code, and the BASIC ... Author. If you take a snapshot just before the ... [code]
SAVE "BA" CODE a,b:RANDOMIZE USR 24027
[/code] -
LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…
... will have been returning to ROM code, and the BASIC interpreter ... /> [code]
SAVE "BA" CODE a,b:RANDOMIZE USR 24027
[/code ... [I]"SAVE "BA" CODE a,b:RANDOMIZE USR 24027"[/I] instructions ... as simple as possible to a complete programming stupido... but ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... routine to use
ld a, b ; retrieve it
and 0x78 ... out VRAM
ld a, %00001111 ; ROM 0, VRAM 1, RAM 7 ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... 21, 255 ; unused locations (ROM 0)
.endif
b
ld a, b ; df-sz to a
inc a ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... counters
ld a, b ; B to A
and %00000111 ... , 255 ; unused locations (ROM 0)
.endif
IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... just after you. After a bit of bother getting ... interface. Sometimes I get a multicoloured/tartan screen but ... PSU plug or socket being a bit loose.
ROM will page out. Pressing ... all drives. Running a [B]Format "m";0[/B] got them back ...harvard architecture spectrum clone.I got my first +2 before christmas. I'd never given the 128k spectrums much thought, always been a 48k rubber key tradionalist. :smile: I've been me…
... liked:-
[CODE]0x0000 ROM ROM ROM ROM RAM RAM RAM RAM
to (8k) 8 9 A B C D E F
ROM and RAM control
... Bits 0-2 select 0x0000 ROM and RAM selection
...Turbo save?I'm doing some experiments with turbo loaders, and I don't know how to save turbo blocks on virtual tapes. Spectaculator and fuse don't seem to save…
... [b]DEF FN A(A,B,C)=USR 65170[/b]. When using FN, A is ... /> - 65192 --> a=0 to save, a=1 to load, ix ... SAVE (ix=start, de=lenght, a=flag?)
- 65333 --> ... +L: POKE 65453,176+L[/b] (line 9925).
ROM routines, so maybe there ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... : none found.
[B]2. Joystick[/B]
If the integrated ... , and checked minimal voltage for a 27C64 ROM (allthough the ZX Spectrum ... suggested.
[B]7. Adding a separate 5V[/B]
Like on ...How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... routines you would do a loop and routine would ... the font together with a bit of code from ... loadfont:
ld hl,font ; ROM font.
ld de,60000 ... to alter.
font1 ld a,(hl) ; get bitmap.
... ; decrement counter.
ld a,b ; high byte.
or ...Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…
... the user wants to run a 'B'-routine, he enters the corresponding ... a '.' to the syntax
- The dot-command quickly loads the 'B'-rom ... into the 'A'-RAM (if not done ... only paged in when the 'B'-ROM is paged in.
Maybe ...Mercenary 1+2 CompendiumDear all users of +3 disks, I am an eager fan of Mercenary game, in which I made a good deal of progress years ago. I was looking for some standart …
... make it load as a savegame, using ROM routines. This option involves ... it to standard ROM load.
b) Load Mercenary 2 ... in memory.
[B]EDIT:[/B] Some useful data for Mercenary ... those patches to load from ROM routines... to convert them ...Mercenary 1+2 CompendiumDear all users of +3 disks, I am an eager fan of Mercenary game, in which I made a good deal of progress years ago. I was looking for some standart …
... make it load as a savegame, using ROM routines. This option involves ... it to standard ROM load.
b) Load Mercenary 2 ... in memory.
[B]EDIT:[/B] Some useful data for Mercenary ... those patches to load from ROM routines... to convert them ...quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... fixes their location), otherwise the ROM will re-allocate space to ... /> [code]
1 [b]DEF FN a(a$,b$)=0:[/b] CLEAR 65535-768: LET ... p(23639)+8/[b]
3 [b]RANDOMIZE FN a("a","b"): POKE da+3 ... GO SUB 90
7 [b]LET a$=b$[/b]
10:
15 ...IF1Bis problems. The Edge of the Spectrum...Advice is sought from the learned on WoS. I just bought an Interface 1Bis from sunny South Africa. It arrived fast, but unfortunately doesn't work.…
... 0016 : d37f ENB_WR OUT (ROM),A; Page out RAM
... 0025 : ed41 OUT (C),B
0027 : cb6a BIT ... /> 0031 : ed41 OUT (C),B
0033 : 1800 JR ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... can be made ready a lot sooner, as there ... ]almost[/I] there. With a bit of collaboration, instead of ... act as a second-screen and mapped over the ROM; then, ... tell it it's board A, B, etc. Then the top ... support everything, and as a game developer I could ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... br />
That's a feature inherited from the Timex ... on ULA-based 128s. A different approach would be ... act as a second-screen and mapped over the ROM; then, ... tell it it's board A, B, etc. Then the top ... which will run on a 128 with a full ULAplus) provides ...Interface 1bis updateSupport for connecting a standard PC keyboard to the interface?s PS/2 socket, in place of a mouse, has been added. The external keyboard?s output is …
... ? joystick signals are asserted, a duplex asynchronous serial communication cable ... the correct output routine when a ?B? channel is opened.
... , either through a RS232 trans-receiver, for a serial model, ... of the interface?s BASIC ROM reads port #DF, and ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... multicolour screens mapped across the ROM and lower 16K address spaces ... . (That the ROM occasionally writes to itself is ... easily overcome by not using ROM routines. But note that ... such as a [B]128K +2, +2A, +3[/B]. Or a single port interface ...Unusual custom turbo loaders - with sourcesI have always been fascinated by turbo loaders; my games all feature a TZX version with one of such schemes implemented, and I have been experimentin…
... four speeds: Normal (same as ROM loading), Medium (not very fast ... /> JR NC,65224
LD A,B
CP 212
JR ... /> LD (HL),A
XOR A
LD (65391),A
LD IX ... /> JR NC,65224
LD A,B
CP 212
JR ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... idea of printing a different character without printing a different character.
a 2-frame cycle, it could ... like (taking as an example a character with 4 aspects and ...analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …
... being able to patch the ROM. It's only using two ... =40," "(TO 5-LEN b$);b$:
LET a=a+3: GO TO 8942 ... /> 8946 PRINT CHR$ b0;: LET a=a+1:
GO TO 8944 ... )
inc bc
ld a,b
or c
jp ...Skooldaze and Back to Skool loading problemsIve got both of these on original Microsphere release and Ive never come across two titles that are so azimuth reliant before!! I mean it has to be …
... in there at a right rate of ...
I had a quick peek at the ... , the standard Speccy ROM routine times bits at ... states for a 0, and 1710T for a 1.
ROM loader) which was ... too much for a lot of setups, ... uses standard ROM timings...
< ...ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... the CPU and/or the ROM might also be bust.
a test? You'd obviously need ... sockets for the CPU and ROM respectively.
Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…
... that TR4/TR5 have failed. A supply rail test as Zorn ... 's have failed such that a data line is being held ... reset). Less likely would be a CPU or ROM failure.
Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
For starters, shouldn't the ROM call be:
[code] ... />
[code]ld (point+2),a ;load de with new start ... ]
At the start A = 0, so this would immediately ...
[B] ld a,(counter)
add a,e
ld e,a[/B]
Issue 6 repair with a twist...(Starting with a slight grump - the forum ate my first attempt at this so this'll probably end up being a bit terse :)) I got a Issue 6 48K machine …
... March testing into the test ROM, which can be obtained [ ... br /> dec bc
ld a, b
or c
jr ... br /> dec bc
ld a, b
or c
jr ... b, a
ld a, ixh
or b
ld ixh, a
ld a ...clear a windowed area of the screenHi everyone! Ain't been on here for donkeys, but have recently started messing around with a little game. I'm looking for ideas/opinions on the bes…
... want to clear at the ROM?[/QUOTE]
Could I ... e,a ;update the destination lo-byte (rrrccccc)
ld a,b ;A =0 ...
adc a,d ;if the row ...
