num2txt (4bit to char) — ZXNet «code.zx»

From Evgeny Goljakov To Alexander Bondarenko 5 June 2003

Hello Alexander. Sat 7 Jun 02 Eugene Palenock -> Alexander Bondarenko: I recommend this: ==== in: a=[#00-#0f] out: a=["0"-"9","A"-"F"] CP#0A SBC A,#69 DAA ==== For a more detailed study, read I. Roshchin’s article for memory: mathematical calculations on Z80, auxiliary procedure, there is a link to the original source. And then there’s what I wouldn’t do: EP> If it's fast then so EP> ld bc, 303fh EP> ld a, d EP> rra EP> rra EP> rra EP> rra EP> or a, b EP> and a, c EP> cp '9'+1+30h EP> jp c, m1a EP> add a, 7 EP> m1a: ld (buff+0), al EP> ld a, d EP> or a, b EP> and a, c EP> cp '9'+1+30h EP> jp c, m1b EP> add a, 7 EP> m1b: ld (buff+1), al EP> ld a, eEP> rra EP> rra EP> rra EP> rra EP> or a, b EP> and a, c EP> cp '9'+1+30h EP> jp c, m1c EP> add a, 7 EP> m1c: ld (buff+2), al EP> ld a, d EP> or a, b EP> and a, c EP> cp '9'+1+30h EP> jp c, m1d EP> add a, 7 EP> m1d: ld (buff+3), al EP> ret EP> buff: db '1234

From Ivan Roshin To All 11 June 2003

Hello, All! Thu 5 Jun 2003 Evgeny Goljakov wrote to Alexander Bondarenko: EG> I recommend this: EG> ==== EG> in: a=[#00-#0f] EG> out: a=["0"-"9","A"-"F"] EG> CP #0A EG> SBC A,#69 EG> DAA EG> ==== EG> For a more detailed study, read the article by I. Roshchin on EG> memory: mathematical calculations on Z80, auxiliary EG> procedure, there is a link to the source. If anyone needs it, I can post the latest version of this here articles (“More about programming arithmetic operations”). Volume - 35 KB ZIP. Best regards, Ivan Roshchin.

From Vladimir Karpenko To Ivan Roshin 13 June 2003

Hello Ivan IR> If anyone needs it, I can upload the latest version of this here IR> articles ("More about programming arithmetic operations"). IR> Volume - 35 KB ZIP. Come on! [ZX][Sprinter registered developer][rw1p2][NedoPC][A600HD] Bye

From Alexander Bondarenko To Ivan Roshin 16 June 2003

*Hello, Ivan!* Catch my ideas about the subject "num2txt (4bit to char)", which I was talking about at 11 Jun 2003 your footcloth to comrade. All. EG>> For a more detailed study, read the article by I. Roshchin on EG>> memory: mathematical calculations on Z80, auxiliary EG>> procedure, there is a link to the source. IR> If anyone needs it, I can upload the latest version of this here IR> articles ("More about programming arithmetic operations"). IR> Volume - 35 KB ZIP. Come on, come on - come in handy. /That’s all, Ivan, you can scroll further.../