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Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…
... /> ret ;
err5:
rst 0x08 ;
defb 0x04 ;
calculate the address
ld a ... -
Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…
... a register and easily calculate the real address ... control code
RST 16 ; fast call
... control code
RST 16 ; fast call
... white\\
RST 16 ; fast call
... AT synbol
RST 16 ; fast call
< ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... br /> sbc hl, de ; calculate offset between start of channels ... hl), b ; reset AT_FLAG
rst 8 ; error "B Integer out ... now DE = %010RR000rrrCCCCC
; Calculate location of the character font ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... br /> sbc hl, de ; calculate offset between start of channels ... hl), b ; reset AT_FLAG
rst 8 ; error "B Integer out ... now DE = %010RR000rrrCCCCC
; Calculate location of the character font ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... 1
sbc hl, de ; calculate offset between start of channels ... ), b ; reset AT_FLAG
rst 8 ; error "B Integer out ... now DE = %010RR000rrrCCCCC
; Calculate location of the character font ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... 1
sbc hl, de ; calculate offset between start of channels ... ), b ; reset AT_FLAG
rst 8 ; error "B Integer out ... now DE = %010RR000rrrCCCCC
; Calculate location of the character font ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... 1
sbc hl, de ; calculate offset between start of channels ... ), b ; reset AT_FLAG
rst 8 ; error "B Integer out ... now DE = %010RR000rrrCCCCC
; Calculate location of the character font ... -
Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…
A standalone routine to calculate integer percentages.
It's ... /> ;Exit with C holding the Percentage value (0-100)
;
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... /> ret ;
err5:
rst 8 ;
defb 4 ;
calculate the address
ld a ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... LD DE,(chans) ; Calculate the offset to the channel ... />
;*********************************************************************************
; the RST $10 replacement routine
; accepts ... the printroutine to replace RST 10/be used in ...BIFROST* Advanced Programming - part 6The purpose of this demo is somewhat different from previous ones. Instead of teaching a new technique, the main goal here is to demonstrate how much…
... [*]Frame 1: Check keys, erase, calculate new position and redraw player ... /> [*]Frame 2: Erase, calculate new position and redraw enemy ... Frame 1: Check keys, erase, calculate new position and redraw player ... that BIFROST* preserves calls to RST #38 by default. It ...Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
Disentangling your code looked too much trouble, so I wrote a quicker BASIC version then an assembler version of that (although that's rather slow even so). It could be written to run more quickly by not using the FP calculator but I expect that it would ...Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
Here's a much quicker version; the BASIC now only takes 50 seconds, and the assembler is reduced from 318 secs to 17 secs. There's still scope for further improvements. The significant change is that it only executes the inner Y loop with valid plot points ...pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... />
The entire code to calculate queue size (or check if ... A* requires processing a significant percentage of the map (such as ...pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... *, it's also required to calculate and add estimated distance to ... make it cover a large percentage of the map anyway. There ... every iteration will need to calculate estimated distance to all goals ...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…
... /> org 0x0007
rom0_entry:
rst start ; jump back to start ... 0x0028
calc:
jp calculate ; immediate jump
; THE ...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…
... to save new array?
rst error ; error
... get first number
rst get_char ; get next character
report_r:
rst error ; report
defb ... /> ld b, (ix + 16) ; calculate
ld c, (ix + 15 ...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…
... ; stack counter
rst get_char ; get current character ... 0x2a20
report_3:
rst error ; else
... br /> call get_hl_x_de ; calculate number of bytes
... ; stack length
rst get_char ; get current character ...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…
...
; THE 'CALCULATE' SUBROUTINE
org 0x33d4
calculate:
call stk_pntrs ; HL ... br /> add hl, de ; calculate address
ld e, ( ... org 0x3535
report_a:
rst error ; error
defb ...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…
... org 0x3621
report_bd:
rst error ; error
defb Integer_out_of_range ... cursor address
and a ; calculate
sbc hl, de ; length ... org 0x3749
report_6b:
rst error ; error
defb Number_too_large ...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…
... br /> add hl, bc ; calculate offset
ld c, (hl ... ; jump if not
rst error ; else
defb ... org 0x1bec
report_n:
rst error ; else
defb ... org 0x1c2e
report_2:
rst error ; else
defb ...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…
... pointer
add hl, bc ; calculate end of line address
report_b2:
rst error ; else
defb Integer_out_of_range ... hl ; stack error address
rst error ; report
defb RETURN_without_GOSUB ...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…
... org 0x39d2
renum_param:
rst get_char ; get next character
renum_error:
rst error ; report
defb Parameter_error ... ; get increment
call hl_equ_hl_x_de ; calculate offset
ld de, (mem_0_2 ...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…
... preserve HL and BC
rst print_a ; print one character< ... column
call cl_addr ; calculate address
ld a, ...Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... DE,16384 : EXX then replace RST $10 with:
[code]
djnz PRINTAB
pop de ;calculate next position
inc e ...Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
Here's something which I converted from a BASIC routine in ZX Computing. The smallint conversion can be discarded if row,col are not derived from some calculation which might render a floating point result. (I can't get the code block to print fixed width, ...Celebrate 20 years of windows 95with the start sound slowed down 4000% lol http://www.factmag.com/2015/08/25/windows-95-startup-sound-slowed-down-4000-percent/
... soon as you try to calculate anything based on "100% slower ... soon as they see a percentage sign they just engage idiot ...Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
... set memory block to write RST command to the address ... reached the breakpoint. The breakpoint (RST command) would cause passing control ... use set block to replace RST command with previous contents of ... a watch) the PC would calculate symbol address and call get ...
