Need fast printing procedure 6*8

Hello everyone! The subject is useful, but with certain conditions: - So that the speed is more or less decent - So as not to use additional already shifted fonts (I know what will happen a little slower, but as much as possible) - So that I can print one character and one line - To avoid using a buffer for text (42 bytes as usual) I hope you can help, there is nowhere else to look for help. Alexander

Hello Alexander! 04 Oct 02 12:56, Alexander Shushkov -> All: AS> A similar subject, but with certain conditions: AS> - So that the speed is more or less decent Criteria for "decency"? [Windows killed] AS> - So that you can print both one character and a line Here's the bummer. If you print one character at a time, it will be much slower than output immediately in a block (4 characters in 3 spaces). AS> - To avoid using a buffer for text (42 bytes as usual) If you output in a block, then a buffer is simply necessary. You decide what is more important to you: the speed of withdrawal or the possibility of withdrawing one symbol. And look at your project more carefully: maybe there you can get out text in blocks. Or use two printers: one is fast, but in blocks, and the second one-character. Alexand

Hello, Alexander! 04 Oct 02 12:56, Alexander Shushkov -> All: AS> A similar subject, but with certain conditions: AS> - So that the speed is more or less decent AS> - So as not to use additional already shifted fonts (I know what will happen AS> somewhat slower, but as much as possible) AS> - So that you can print one character and a line AS> - To avoid using a buffer for text (42 bytes as usual) What is more important to you? To consume little memory, or to work quickly? Get the driver from Isdos. I had Soretz somewhere... If speed is not too critical, I can give you a 5*8 printer from ZXZIP. Let It’s slow, but it’s clearly visible and there’s more information on the screen. WBR, Jason. /*e-mail: jason2000(scary dog)yandex.ru ICQ: 62235830*/ /np:/ *silence*

Hello, Alexander! 04 Oct 02 12:56, Alexander Shushkov -> All: Hello All! Is it possible even faster, higher, stronger... without opening cycles? ╒═══< Begin file: print42a.asm >════════ PR42_Y DB 0 ;Y-print position (0-23) PR42_X DB 0 ;X print position (0-255) ;************************************************ ;print character [A] PR42_A exx : ld bc,(PR42_Y) ;24 ld d,FONT/256 : ld e,a ;11 ;35 ;--------------------------------------- ld a,c : and %00011000 ;11 or #40 : ld h,a ;11 ld a,b : and %11111000 ;11 ld l,a ;4 ld a,c : and %00000111 ;11 or l : rrca : rrca : rrca ;16 ld l,a ;4 ;--------------------------------------- ;68 ld a,b : ld b,8 : rrca ;15 and %00000011 : jr z,PR42_A0 ;14 ;137 dec a : jr z,PR42_A2 ;11 ;148 dec a : jr z,PR42_A4 ;11 ;159 ;--------------------------------------- ;154 PR42_A6 ld c,%00000011 ;7 PR42_A7 ld a,(de) : rlca : rlca ;15 xor (hl) : and c : xor (hl) ;18 ld (hl),a : inc l ;11 ld a,(de) ;7 rlca: rlca: rrd;26 ld (hl),a : dec l : inc h,d ;19 djnz PR42_A7 ;13 exx : ret ;14; ---- ;7+109*8-5+14 = 888 + 154 = 1042 ;--------------------------------------- PR42_A4 ld c,%11000000 ;7 PR42_A5 rrd : ld a,(de) ;25 rrca : rrca : rrca : rrca ;16 rld : inc l ;22 xor (hl) : and c : xor (hl) ;18 ld (hl),a : dec l : inc h,d ;19 djnz PR42_A5 ;13 exx : ret ;14 ; ---- ;7+113*8-5+14 = 920 + 159 = 1079 ;--------------------------------------- PR42_A2 ld c,%00111111 ;7 PR42_A3 ld a,(de) : rrca : rrca ;15 xor (hl) : and c : xor (hl) ;18 ld (hl),a : inc h,d ;15 djnz PR42_A3 ;13 exx : ret ;14 ; ---- ;7+61*8-5+14 = 504 + 148 = 652 ;--------------------------------------- PR42_A0 ld c,%11111100 ;7 PR42_A1 ld a,(de) ;7 xor (hl) : and c : xor (hl) ;18 ld (hl),a : inc h,d ;15 djnz PR42_A1 ;13 exx : ret ;14 ; ---- ;7+53*8-5+14 = 440 + 137 = 577 ;--------------------------------------- ;min: 577 ;max: 1079 ;byte: 114 ╘═══< End file: print42a.asm >══════════ Счастливо. Михаил. + Origin: SPbZXNet'2001 (500:812/8) WBR, Jason./*e-mail: jason2000(scary dog)yandex.ru ICQ: 62235830*/ /np:/ *silence*

Hello, Alexander! 04 Oct 02 12:56, Alexander Shushkov -> All: Hello Mikhail! 11 Mar 01 21:21, Mihail Zharov -> All: MZ> Is it possible even faster, higher, stronger... MZ> without cycle expansion? MZ> ╒═══< Begin file: print42a.asm >════════ MZ> PR42_Y DB 0 ;Y-print position (0-23) MZ> PR42_X DB 0 ;X-print position (0-255) The least significant bit of the X coordinate is ignored, ^^^^^ i.e. your signet is honorable :) [--skip--] MZ> PR42_A6 ld c,%00000011 ;7 MZ> PR42_A7 ld a,(de) : rlca : rlca ;15 MZ> xor (hl) : and c : xor (hl) ;18 MZ> ld (hl),a : incl ;11 MZ> ld a,(de) ;7 MZ> rlca : rlca : rrd ;26 MZ> ld (hl),a : dec l : inc h,d ;19 MZ> djnz PR42_A7 ;13 MZ> exx : ret ;14 MZ> ;--- MZ> ;7+109*8-5+14 = 888 This flow can be speeded up a little. Here: HL = address on screen DE = font address B=8PR42_A6 LD A,(HL) ;07 RRCA : RRCA : LD C,A ;12 LD A,(DE) ;07 RLCA : RL C : RLCA : RL C ;24 LD (HL),C : INC L : RRD ;27 LD (HL),A : DEC L : INC H,D ;19 DJNZ PR42_A6 ;13 EXX : RET ;14 ;--- ;109*8-5+14 = 881 A total of 7 bars, and for the scorpion - another 15, by reducing odd-clock instructions in the cycle. [--skip--] ... + Origin: not present (500:812/8.29) WBR, Jason. /*e-mail: jason2000(scary dog)yandex.ru ICQ: 62235830*/ /np:/ *silence*

Thanks for the answer...

Hello Alexander! Friday, 04 October 2002, at 12:56:32 Alexander Shushkov -> All. AS> A similar subject, but with certain conditions: AS> - So that the speed is more or less decent How many clock cycles is this per character? Or in other words - “decent” in relation to what? After all, no one specifically writes “brakes”... ;) They write for a specific program, but what is it for you? How many bytes can you allocate in main memory? AS> - To avoid using additional already shifted fonts AS> (I know there will be several AS> slower, but as much as possible) You cannot use fast font, where the bytes of the character matrix offset by 256 bytes? Why? Is the font full (256 characters - 2 kilos) or not? AS> - So that you can print both one character and a line Outer loop over a one-character typewriter, but better, two different/specialized items. AS> - To avoid using a buffer for text (as usual 42 AS> bytes) Bad. All the requirements together are a terrible drag on the line. It will turn out approximately: for _one_ character, from 600 to 1200 clock cycles, about 150 bytes; for _line_ it turns out to be over 36,000 cycles. (all repetitions are collapsed into cycles) AS> I hope you can help, there is nowhere else to look for help.I only have everything for fast font. I don't want to "slow down" ;) Have a nice conversation, Alexander.

Hello Valerij! Tuesday, 08 October 2002, at 14:20:49, Valerij Kozhevnikoff -> Alexander Shushkov. VK> ;--------------------------------------- VK> ;min: 577 VK> ;max: 1079 VK> ;byte: 114 VK> ╘═══< End file: print42a.asm >══════════ Long outdated. Here's the last one: ╒═════════════════< Begin file: print42a.asm >═════════════════╕ ;************************************************ ;PRINT CHARACTER (a), X:0-255, Y:0-23. ;(c) 2000 JAM&POL, VIVID, MAS. ;************************************************ ; in: a - number of the character to print ;--------------------------------------- PR42_A ld d,FONT/256: ld e,a ld bc,#0000 PR42_Y EQU $-2 ;c - Y PR42_X EQU $-1 ;b - X ;t=21 ;------------------- ;calculate the address on the screen. ld a,c: and %00011000 or #40: ld h,a: ld a,c xor b: and %00000111: xor b rrca: rrca: rrca: ld l,a ;t=57 ;------------------- ;print at even X-coordinate... ld a,b: ld b,8: rrca rrca: jr nc,PR42_A0 ;109 rrca: jr c,PR42_A6 ;120 ;115 ;------------------- ;print from 2 pixels - %00111111 ld c,%00111111 PR42_A2_ld a,(de): rrca: rrca xor (hl): and c: xor (hl) ld (hl),a: inc h,d djnz PR42_A2_ret ;t=7+61*8-5+10=500 +115=615 ;------------------- PR42_A0 rrca: jr c,PR42_A4 ;print from 0 pixels - %11111100 ld c,%00000011: ex de,hl PR42_A0_ ld a,(de): and c: or (hl) ld (de),a: inc h,d djnz PR42_A0_ ret ;t=22+46*8-5+10=395 +109=504 ;------------------- ;print with 4 pixels - %00001111-1 PR42_A4 ld c,%11000000 PR42_A4_ rrd: ld a,(de) rrca: rrca: rrca: rrca rld: inc l xor (hl): and c: xor (hl) ld (hl),a: dec l: inc h,d djnz PR42_A4_ ret ;t=7+113*8-5+10=916 +125=1041 ;------------------- ;print with 6 pixels - %00000011-11110000 PR42_A6 ld a,(de) rlca: rlca: ld c,a xor (hl): and %00000011 xor (hl): ld (hl),a: inc l ld a,c: rrd ld (hl),a: dec l: inc h,d djnz PR42_A6 ret ;t=105*8-5+10=845 +120=965 ;-------------------------------------- ;504,615,965,1041 bps / 102 bytes ╘═════════════════< End file: print42a.asm >═══════════════════╛ Ha cleaning exx not foam. And people asked not for fast-font ... Nice connections, Valerij.

Hello Valerij! Tuesday, 08 October 2002, at 14:21:23, Valerij Kozhevnikoff -> Alexander Shushkov. VK> This flow can be speeded up a little. VK> Here: HL = address on screen VK> DE = address in font VK> B = 8 VK> PR42_A6 LD A,(HL) ;07 VK> RRCA : RRCA : LD C,A ;12 VK> LD A,(DE) ;07 VK> RLCA : RL C : RLCA : RL C ;24 VK> LD (HL),C : INC L : RRD ;27 VK> LD (HL),A : DEC L : INC H,D ;19 VK> DJNZ PR42_A6 ;13 VK> EXX : RET ;14 VK> ;--- VK> ;109*8-5+14 = 881 It can be even faster ;) Stream A4 begs to be rewritten faster, but for some reason it doesn't work ;( And the most interesting optimization in block printing is 4 symbols with pixel lines, wave and amble ;) Like 19,000 clock cycles per 50 bytes to print a line. 2all: What options do you have? ;) Have a nice conversation, Valerij.

Hello Valerij! VK> What is more important to you? To consume little memory, or to work quickly? VK> Take the driver from Isdos. Soretz was with me somewhere... VK> If speed is not too critical, I can give you a 5*8 printer from ZXZIP. VK> It may be slow, but it’s clearly visible and more information fits onto the screen. I need your more or less decent speed and I also need memory for others goals. The 5*8 printing machine doesn’t look very nice, but I would also like some beauty. Alexander

Hello Valerij! Thanks for the procedure. I'll test it and compare it with others. Alexander

*You will live long, Alexander!* It was Oct 15, 2002, you gave birth to a whole footcloth for Valerij Kozhevnikoff, about "A fast 6*8 printing procedure is needed." She intrigued me, I'm sending oncoming VK>> If speed is not too critical, I can give a printer 5*8 from VK>> ZXZIP. It may be slow, but it’s clearly visible and there’s more information on the screen VK>> fits in. AS> I need your more or less decent speed and I also need memory for AS> other purposes. Printer 5*8 does not look very nice, but beauty AS> too AS> I would like to. The most beautiful printing machine is a proportional font. /That’s all, Alexander, what follows is only the truth.../