DIY_EFI Digest Friday, 4 December 1998 Volume 03 : Number 582 In this issue: Re: Re: HC11 & Edelbrock ProFlow Re: Re: HC11 & Edelbrock ProFlow Re: Re: HC11 & Edelbrock ProFlow Re: IC Identify from DENSO EFI controller.. help? See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Orin Eman Date: Fri, 4 Dec 1998 00:24:12 -0800 (PST) Subject: Re: Re: HC11 & Edelbrock ProFlow > Tom Sharpe wrote: > > I forgot where I got them.... from a list of op codes somewhere. > > > > 7B (D) 6B (X) 186B (Y) = TIM (Test immediate to memory????) > > 75 (D) 65 (X) 1865 (Y) = EIM (same as EORA except to memory) > > 72 (D) 62(X) 1862 (Y) = OIM (same as ORAA except to memory) > Those aren't standard 68HC11 instructions. Are you sure they are in > code? Could it be that you disassembled a data area as if it were code? > If they are actually used as real opcodes, then Motorola is being > sneaky. The 'HC11 is supposed to trap all illegal opcodes - thus > preventing programmers from using the interesting results of undefined > opcodes. Moto could have added these opcodes (under the table) at some > point. This isn't unheard of - some Intel 8085's contain some very > useful extra opcodes. The direct and X register versions above match the Hitachi HD6303. Perhaps it's a Hitachi variant, or Motorola merged Hitachi changes back into their CPUs. Orin. ------------------------------ From: Mike Morrin Date: Fri, 04 Dec 1998 21:23:15 +1300 Subject: Re: Re: HC11 & Edelbrock ProFlow At 08:03 pm 12/3/98 -0800, Ludis Langens wrote: >Tom Sharpe wrote: >> I forgot where I got them.... from a list of op codes somewhere. >> >> 7B (D) 6B (X) 186B (Y) = TIM (Test immediate to memory????) >> 75 (D) 65 (X) 1865 (Y) = EIM (same as EORA except to memory) >> 72 (D) 62(X) 1862 (Y) = OIM (same as ORAA except to memory) > >Those aren't standard 68HC11 instructions. Are you sure they are in >code? Could it be that you disassembled a data area as if it were code? Don't shoot me if I'm wrong, as I have not worked with 6303 for several years, but I think those instructions are present in the Hitachi 6303, which was a 6803 derivative, if memory serves, it had no Y register, and the XGDX instruction had a different opcode from the HC11, otherwise they were code compatible. regards, Mike ------------------------------ From: Mike Morrin Date: Fri, 04 Dec 1998 21:23:15 +1300 Subject: Re: Re: HC11 & Edelbrock ProFlow At 08:03 pm 12/3/98 -0800, Ludis Langens wrote: >Tom Sharpe wrote: >> I forgot where I got them.... from a list of op codes somewhere. >> >> 7B (D) 6B (X) 186B (Y) = TIM (Test immediate to memory????) >> 75 (D) 65 (X) 1865 (Y) = EIM (same as EORA except to memory) >> 72 (D) 62(X) 1862 (Y) = OIM (same as ORAA except to memory) > >Those aren't standard 68HC11 instructions. Are you sure they are in >code? Could it be that you disassembled a data area as if it were code? Don't shoot me if I'm wrong, as I have not worked with 6303 for several years, but I think those instructions are present in the Hitachi 6303, which was a 6803 derivative, if memory serves, it had no Y register, and the XGDX instruction had a different opcode from the HC11, otherwise they were code compatible. regards, Mike ------------------------------ From: wrm@xxx.za (Wouter de Waal) Date: Fri, 04 Dec 1998 11:06:38 +0200 Subject: Re: IC Identify from DENSO EFI controller.. help? Hi all *snip* >Hitachi HD63B40P 28DIP 6800 programmable timer > but no second source or data sheet available from IC master or Hitachi > >Hitachi HD63B21P 40DIP 6800 PIA > but no second source or data sheet available from IC master or Hitachi Try looking for 6840 and 6821. *Very* common Motorola peripherals. Hitachi second sourced many Moto 68 components, sometimes improving them (6309 vs 6809), and labelled them 63xx instead of 68xx. >ND MG2530 40DIP ? Processor? That number does look *slightly* familiar. Maybe used in an old arcade game or something. Wouter ------------------------------ End of DIY_EFI Digest V3 #582 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".