Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.forth > #135281

Re: Ragsdale Forth assembler history

Show all headers | View raw

On 30/07/2026 7:50 am, Johann Klasek - swap last two domainparts wrote:
> Hi folks,
> 
> sometimes ago (2012) I did some re-work on a 65C02 assembler derived
> from the well known Ragsdale Assembler published in c't magazin,
> 1984/01, p. 72, "65C02 Assembler in FORTH".
> 
> The aim was to support WDC commands (not just those from Rockwell). In
> addition to a number of performance improvements (which were due to
> shortcomings in the Ragsdale code), several new features were
> introduced: certain structure commands, as well as loop or conditional
> blocks, can now (using the word `FAR') span code sections of more than
> 127 bytes.
> Recently, in 2026, a number of further changes were made to improve
> runtime performance.
> 
> https://klasek.at/forth/ also covers a number of other Forth topics,
> though the main focus there is on assemblers and disassemblers.
> 
> My test environment is a C64 Forth/79 from Performance Micro Products,
> but I don't think porting it would be a problem (at least on little-
> endian platforms).

Interesting.  While I left the 6502 behind long ago, I also had need to upgrade
Cassady's 8080 assembler to Z80 and again to eZ80.  I deliberately retained
Intel's mnemonics (with TDL extensions) knowing Zilog's would be an expensive
PITA for no demonstrable gain.  Indeed Zilog themselves would have preferred to
use Intel's but fearing legal action, hired a third party to devise a new set:

https://www.retrotechnology.com/restore/TDLmonitor.html

Back to comp.lang.forth | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Ragsdale Forth assembler history "Johann Klasek - swap last two domainparts" <johann+usenet@at.klasek.invalid> - 2026-07-29 21:50 +0000
  Re: Ragsdale Forth assembler history dxf <dxforth@gmail.com> - 2026-07-30 13:18 +1000
    Re: Ragsdale Forth assembler history "Johann Klasek - swap last two domainparts" <johann+usenet@at.klasek.invalid> - 2026-07-31 11:04 +0000

csiph-web