09-07-2020, 02:04 PM
Hi
I decided to buy an eprom module for the HP-71b that is placed in the card reader port. I have burned 2 TI 27c256 emproms but as soon as I try to CAT :port(5) the HP-71b just goes blank until I press cancel. The .bin images were tested in emu71 as IRAMs and worked fine. The burning was also verified as ok. Any thoughts as to why this may be happening ? I guess I could try a different brand of eprom. Is there a special format for writing EPROMs for the HHP eprom module? I note both eprom images are filled with zeros at the end to fill the eprom ?
Any thoughts appreciated
Richard
I decided to buy an eprom module for the HP-71b that is placed in the card reader port. I have burned 2 TI 27c256 emproms but as soon as I try to CAT :port(5) the HP-71b just goes blank until I press cancel. The .bin images were tested in emu71 as IRAMs and worked fine. The burning was also verified as ok. Any thoughts as to why this may be happening ? I guess I could try a different brand of eprom. Is there a special format for writing EPROMs for the HHP eprom module? I note both eprom images are filled with zeros at the end to fill the eprom ?
Any thoughts appreciated
Richard