Mark Garlanger
Mark Garlanger
Added official Heath software programs for the H88 cassette interface. These programs were originally written for the H8 and it's cassette interface, but needed updating to support the H89's 8250...
Disabling the border fixes the off-center issue of the active area, and adjusting the visarea makes it similar to what a real h19/h89 screen would look like.
Verified with the build artifacts on this PR that the DE check prevents the crash in Windows (tested with a load prior to the original revert and saw the crash...
Adds the SigmaSoft and Systems Interactive Graphics Controller (IGC) device for the H89 computer. Unlike the other graphics upgrades for the Heath H19 which had all the changes/connections in the...
Initial code for the Heath H-88-1 Hard-sectored controller for the H-89 family of systems. This supported up to 3 floppy drives. This initial code implements the I/O ports of the...
Here is an alternative to the PR adding floppy hard-sectored support - https://github.com/mamedev/mame/pull/11705. There are 2 key differences between this PR and the existing open PR linked above: 1. It...
Uncommented code in mc6845.cpp which fixes the heathkit gp19 device when operating in 50 line mode. I've made the uncommented code conditional requiring the system wanting to use it to...
### MAME version 0.259 ### System information Macbook Pro 16" M1. Mac OS 14.0, bgfx. ### INI configuration details ```INI ``` ### Emulated system/software h19 with tlb slot device gp19...
Functional change: - Adds writing to standard RAM when H89 has a full 64k and lower 8k is in ROM/special RAM mode. Changes include: - Changed to use u8/u16/u32. -...
General cleanup including - Removed method declarations that were not used/implemented. - Changed to use u8/u16/u32. - Add consistent horizontal spacing for readability. - Removed some duplicate comments.