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From: ggw@ethos.UUCP (Gregory Woodbury)
Newsgroups: comp.lang.forth
Subject: Re: TIL design topics
Message-ID: <923@ethos.UUCP>
Date: Wed, 26-Nov-86 01:18:39 EST
Article-I.D.: ethos.923
Posted: Wed Nov 26 01:18:39 1986
Date-Received: Wed, 26-Nov-86 20:14:14 EST
References: <1001@usl.UUCP> <754@argon.idec.stc.co.uk>
Reply-To: ggw@ethos.UUCP (Gregory Woodbury)
Organization: Humanities Forum at ethos, Durham, NC
Lines: 31
Keywords: Roll Your Own Language

In article <754@argon.idec.stc.co.uk> howellg@idec.stc.co.uk (Gareth Howell) writes:
>In article <1001@usl.UUCP> elg@usl.UUCP (Eric Lee Green) writes:
}>
}>I am currently designing a small threaded language in which to program
}>my fairly new Commodore 128. I don't particularly like FORTH, it is
}>excruciatingly slow on a 6502, and the command names are just aweful
}>
>Have you considered swapping your 6502 for a Western Digital 65802
>processor.  This is a pin for pin replacement that has an expanded
>register and instruction set; including instructions that speed up
>words like NEXT.  Have a look at "Implementing FORTH on a New
>Processor: FORTH for the 65816 and 65802" by John Bowling of Starlight
>FORTH Systems.  It was presented at the 1984 Rochester FORTH
>conference.

The only problem is that the C-128 CPU is an 8502 which is a 6510 work-alike
that has additional lines for external control devices and co-processors.
I have been looking around for details of the 8502, but can't locate data sheets
for it.  Additionally, on the C-128, you should consider using the MMUs
ability to relocate the stack and page 0 to alternate locations, this frees
additional space for the implementations of stack based operations.

------------------------------------------
Gregory G. Woodbury				The usual disclaimers apply
CEO, Research Triangle C-64/128 User's Group
{duke|mcnc|rti-sel}!ethos!ggw                 The line eater is a boojum snark!
-- 
------------------------------------------
Gregory G. Woodbury				The usual disclaimers apply
CEO, Research Triangle C-64/128 User's Group
{duke|mcnc|rti-sel}!ethos!ggw                 The line eater is a boojum snark!